Some standard content:
1 Scope
National Standard of the People's Republic of China
Seamless steel tubes and pipes for high pressure boiler
Seamless steel tubes and pipes for high pressure boilerGB53101995
Replaces GB5310-85
This standard specifies the dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of seamless steel tubes for high pressure boilers.
This standard is applicable to the manufacture of high-quality carbon structural steel, alloy structural steel and non-heat-resistant steel seamless steel tubes for steam boilers and pipelines at high pressure and above.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard by being applicable in this standard: When this standard is published, the versions shown are valid. All standards are subject to revision, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB222—84 Sampling method for chemical analysis of steel and allowable deviation of chemical composition of finished products GB223.588 Chemical analysis methods for steel and alloys Oxalic acid-ferrous sulfate silicon lead blue photometric method for determination of chromium content GB/T223.10-91 Chemical analysis methods for iron and steel and alloys Copper iron reagent separation-chromium Tianken S photometric method for determination of aluminum content CB/T223.11—91 Chemical analysis methods for steel and alloys Ammonium persulfate oxidation method for determination of chromium content GB/T223.12:-91 Chemical analysis methods for steel and alloys Sodium carbonate separation-diphenylcarbazide photometric method for determination of chromium content GB223.14—89 Chemical analysis methods for steel and alloys Molybdenum Determination of vanadium content by reagent extraction photometric method GB223.17-89 Chemical analysis of gold content in steel Hall method Determination of titanium content by diantipyrine dichloroethane photometric method GB223.19-89 Chemical analysis methods for steel and alloys Determination of steel content by new cuproline-trichloroethane extraction photometric method GB/T223.23-94 Chemical analysis methods for steel and alloys Determination of nickel content by 1-ketone spectrophotometric method GB223.26-80 Chemical analysis methods for steel and alloys Determination of aluminum content by thiochloride direct photometric method GB/T223.2794 Chemical analysis methods for steel and alloys Determination of lead content by thiochloride-butyl acetate extraction spectrophotometric method GB223.37-89 Steel improvement Alloy chemical analysis method: Distillation separation-indigophenol monitoring photometric determination of fluorine content GB223.40-85 Iron and steel and alloy chemical analysis method: Ion exchange separation-sulfuron phenol S photometric determination of fluorine content GB223.41-85 Iron and steel alloy chemical analysis method: Ion exchange separation-pyrogallol photometric determination of tungsten content GB/I223.44-91 Iron and steel and alloy chemical analysis method: tetrachloride-thiocyanate-chlorine calcined extraction spectrophotometric determination of tungsten content GB223.59-87 Iron and steel and alloy chemical analysis method: Antimony, phosphorus and molybdenum blue photometric determination of phosphorus content GB223.63-88 Iron and steel and alloy chemical analysis method: High Sodium (potassium) iodate photometric method for determination of manganese GB223.68—89 Chemical analysis methods for steel and alloys Combustion-potassium iodate volumetric method for determination of sulfur content GB223.69-89 Chemical analysis methods for steel and alloys Combustion gas penetration method for determination of carbon content GB/T223.75—91 Chemical analysis methods for steel and alloys Alcohol distillation curcumin photometric method for determination of boron toe GB224—87 Determination of decarburization depth of steel GB226—91 Acid etching method for macrostructure and defects of steel Approved by State Administration of Technical Supervision on October 10, 1995
Implementation on March 1, 1996
Metallic drawing test method
GB 228—87
GB241--90Method for hydraulic pressure test of metal tube
GB242-82Metal arm expansion test method
GB246—82Metal tube flattening test method
GB 5310---1995
GB1979—80Structural steel macrostructure defect rating diagramGB2102—88Acceptance, packaging, marking and quality certificate of steel tubeGB/T229—1994Metal Charpy notch impact test methodGB3652--83Metal tube high temperature tensile test methodGB 4163—84
GB 5777-86
GB 6395—86
GB 6397-86
GB 7735-87
GB 1056189
Ultrasonic flaw detection method for stainless steel tube
Ultrasonic flaw detection method for seamless steel tube
Metal high temperature tensile endurance test method
Metal tensile test specimen
Eddy current flaw detection method for steel tube
Microscopic evaluation method for non-metal inclusions in steel GB/T 12606—90
GB/T 13298-91
YB/T 5137--93
Magnetic leakage flaw detection method for steel tube and round steel
Method for metal microstructure examination
Seamless steel tube for high temperature
YB/T 5148--93
Method for determination of average grain size of metal
3 Dimensions, shape and weight
3.1 Outside diameter and wall thickness
3.1.1 The outside diameter and wall thickness of hot-rolled (extruded, expanded) and cold-rolled (rolled) steel pipes shall comply with the provisions of Table 1 and Table 2 respectively. According to the requirements of the purchaser, after negotiation between the supply and demand parties, steel pipes of other specifications other than those specified in Table 1 and Table 2 may be supplied. Nominal outer diameter
0.98h1.20
GB5310-1995
Table 1 Nominal outer diameter and wall thickness of hot-rolled (extruded) steel pipes, mm
2.71 2.89
3.33:3.55
Note: The small size in brackets is not recommended, 1.72
Theoretical quantity, kg/m
4. 88 : 5. 52
6. 98 : 7. 55
7. 897.99
10. 51|11: 39
10.3611. 33,12. 28
13.50|15.09
15.7817.291
24.14.26.24
12.6713.42
13.9611.80
15. 0711. 98
17.4818.54
18.5919.73
19.7020.51
20. 9922.29
25.62 27.22
25.8927.7929.68
32.2831.40
Nominal outer diameter
GB 5310—1995
Table 1 (continued)
Nominal wall thickness, mm
Theoretical weight, kg/m
18.94,2 0.20
21.1:22.44
22.7924.36
30.1632.15
23.3 025.65
30.1832.3834,5236.62
32.2634,62
36.6239 ,65
36.74!40.t3
38.9642.59
45-37149.64
51. 54:56.
46.1649.69
53.8658.02
Note: The scale in brackets is not recommended,
24.73↓25.74
53. 2756. 4259. 53
70.2374,2C
85.0890.35
9.9931.07
4.3379.90
93, 31100, 61104. 1
.89115.
100.76105.89110.920.98130.80135.62.43101.40
107.32113.19119.01124,
78136.17147.37152.8
132.1 8140.
116.69125.32133.90142.
42.24152,03161.
150. 52.160
160.85172.
67.79179.
178.14:190.
150. 92159, 35167.
171.24181.52191,76201.9
4176.07192,5
83.08194.10205.(17216.00226
9208.917.01
87248. 47269.88280.5
190.97202.48213.95225.37296.574259.32281.72292.8
42251.53275.60299
Nominal outer diameter
68. 60|72. 5076.2079. 70
GB 5310-1995
Table 1 (end)
Nominal weight, mm
Theoretical weight.kg/m
76.9481.18858229.96831
85.279.13/5.13p.22104.81
91.0496.67102. 007 3112. 35
107. 71114. 62123. 3
127.84134.
19121.82h36.25
123.74131.88139.8247.5165.11162.46159.53h.7140,4149,83159.0668.0817 6.9 | |tt | 71205.07218.24231.21213. 94 | | tt | 66371.13107.38630. 562.0520.08256.1272.23287.5302.317,67332.42346.9768256.1674.1292. 9310.1628.6
271 85291. 88310. 72329. 85348. 79367, 5291. t9312. 1p32. 91353. 573. 04)22
.57449.4
43403.7943.269.03187.82500.1528.9h
61 510,96541.53563.95575.65611.6384193.2044.10577.04601.24677.12555.965 11.35530,1558.53821.43647.84665.20707.2303.1325.1347.71369.31390.71 1.2132.03153.4174.36504.1632554.8613.15651.0257B.91597.26742.214505. 43638. 20570.
591.84354.57595.41725.52745,35794.0323.14546.62369,90392.98115. 87138.55161.04183.JtNote: It is not recommended to use the size less than 20
CB 5310—1995
1*818*92
992189
6222191
15'0701*6131**1,e7*2
6581e71
20'etse'v1!
81*21155*1E
1801 11'01
1 89-t
GB 5310—1995
3.1.2 The allowable deviation of the outer diameter and wall thickness shall comply with the provisions of Table 3. The allowable deviation of the size of the heat-expanded tube shall be negotiated by the supply and demand parties. According to the requirements of the demander, after negotiation between the two parties and indicated in the contract, steel tubes with deviations other than those specified in Table 3 may be produced. Table 3 Allowable deviation of outer diameter and wall thickness Types of copper tubes Hot-rolled (umbilical) tubes Lingpu (breast) tubes 3.2 Length 3.2.1 Through-band length The usual length of steel tubes is 4000~12000mm, ordinary Allowable deviation ±1.0% (minimum value is ±0.5mm) +15% 1 The minimum value is 10.48mm; 10%!
-0. 32 mm!
=0, 20 mm
--12 yuan
0.35% (minimum ±0.3 mm)
+10% (minimum 0.2 mm)
After negotiation between the supply and demand parties, short steel pipes with a length of not less than 3000 mm and not exceeding 5% of the total weight of the batch of steel pipes can be delivered. 3.2.2 Fixed length and multiple lengths
Fixed length and multiple lengths should be within the normal length range, and the allowable deviation of the total length is +20 mm. The length of each multiple is subject to the following provisions to add a cut margin,
Ds159mm..
>-159mm..
3.3 Curvature
-5l0mn
.10~15mm
The curvature of the steel pipe shall not be greater than the following provisions: S≤15 tit.......5 mm/m
S>15~30 mm*.*2. U mm/m
S>30 mm.....
.3.0 mm/m
The total curvature of the header pipe shall not be greater than 12mm. 3.4 End shape
Both ends of the steel arm should be cut into angles and burrs should be removed. 3.5 Ovality and wall thickness unevenness
GB 5310—1995
According to the requirements of the purchaser, after negotiation between the supply and demand parties, and indicated in the contract, the ovality and wall thickness unevenness of the steel pipe shall not exceed 80% of the outer diameter and wall thickness tolerances respectively.
3.6 Delivery weight
3.6.1 The steel pipe shall be delivered by actual weight or by theoretical weight. The theoretical weight of high-quality carbon structural steel pipes and alloy structural steel pipes is shown in Table 1 and Table 2. The theoretical weight of steel pipe per meter (the density of steel is 7.8kg/dm2) is calculated according to formula (1):
W= 0. 024 66(DS)S
Theoretical weight of steel pipe per meter, kg;
W—
S—nominal wall thickness of steel pipe, mm;
D)—nominal outer diameter of steel pipe, mm.
The theoretical weight of austenitic stainless heat-resistant steel pipe is 1.015 times of the theoretical weight in Table 1 and Table 2. (1)
3.6.2 According to the requirements of the purchaser, after negotiation between the two parties and indicated in the contract, the allowable deviation between the actual weight and theoretical weight of the delivered steel pipe is: Single steel pipe
Steel pipe with a minimum batch size of 1 t
3.7 Marking example
Pipe made of 12Cr1MoVG steel with an outer diameter of 108mm and a wall thickness of 8mm a) Hot rolled (extruded, expanded) steel pipe with ordinary grade precision in diameter and wall thickness and a length of 5500mm. Its mark is: Steel pipe 12Cr1MaVG-108X8×5500-GB53101995 b) Cold cut ( Rolled) steel pipe, the diameter is high-grade precision, the wall thickness is ordinary-grade precision, the length is 8000mm, and its mark is: Steel pipe dial (rolled) 12Cr1MoVG-108 high × 8 × 8000 GB5310-19954 Technical requirements
4.1 Steel grade and chemical composition
4.1.1 Steel grade and chemical composition (melting analysis) shall comply with the provisions of Table 1, and the steel pipe shall be accepted according to the melting composition 4.1.2 If the purchaser requires finished product analysis, it should be indicated in the contract. The allowable deviation of the chemical composition of the finished steel back shall comply with the provisions of GB222. 4.2 Reversal method
4.2.1 Steel manufacturing method
Steel can be manufactured by furnace, electric furnace or by open hearth, electric furnace, oxygen converter and refining outside the furnace: 1Cr18Ni9,1Cr19Ni11Nh and 10Cr9Mo1VVb steels are made by electric furnace plus external refining or electroslag remelting. Steels made by directly using ingots or continuous casting and rolling must be refined externally. Ingots can also be made by electroslag remelting. Other smelting methods can also be used after consultation between the supply and demand parties. When the purchaser specifies a certain smelting method, it should be indicated in the contract. 4.2.2 Manufacturing method of forged and rolled tubes
The manufacturing and requirements of forged and rolled tubes should comply with the provisions of YB/T5137. 4.2.3 Manufacturing method of steel pipes
Steel pipes are manufactured by hot rolling (extrusion, expansion) or cold drawing (rolling) seamless methods. When the purchaser specifies a certain method to manufacture steel pipes, it should be indicated in the contract.
4.3 Delivery status
Steel pipes are delivered after heat treatment according to the heat treatment system specified in Table 5. The heat treatment system should be filled in the quality certificate. CB 5310-1995
200000
~90 °0
os00800
oo0oto0
000805
[~900'0~2z '0 [
~09 -1
--80 *0
-06 *0
-2t '0
~06 ℃
--60*0
--of*0
-~~2t0
00 108-0
~-2T 0
H!LISAOWEIE!
GB5310—1995
sso.ojosoo
~00°6
~00 21
4.4 Mechanical properties
GB 5310--1995
4.4.1 The mechanical properties of the steel pipe in the delivery state shall comply with the provisions of Table 6. For steel pipes with an outer diameter greater than or equal to 76mm and a wall thickness greater than or equal to 14mm, a longitudinal impact test shall be conducted. For steel pipes with an outer diameter greater than or equal to 219mm and a wall thickness greater than or equal to 25mm, a transverse mechanical property test shall be conducted instead of a longitudinal mechanical property test.
-One of the three punching test specimens is allowed to have an impact energy 30% lower than the minimum value specified in Table 6, but the arithmetic half mean of the three test specimens shall not be less than the specified value in Table 6.
Table 5 Heat treatment system of steel pipe
20MnG25MnG
15MoGu
20MoGl
12CrMoGn
15CiMoGJ
12r2MoGJ
[2CrIMnVG1
12Cr2MoWVTiE
12Cr3MoVSiTiB||t t||IoCr9MntVNh
1C+18Ni9
1Cr19NiitNb
Heat treatment system
900~930℃ normalizing, the hot rolled tube rolling temperature is not less than 9U0℃, it can replace normalizing 900~930 quenching + hot rolled tube final rolling temperature is not less than 900℃ + it can replace normalizing 910～940℃ normalizing
900~930 normalizing. 670~720℃: quenching, holding time: periodic furnace is more than 21. Continuous furnace is too much for 1h930~960C normalizing: E80~720℃ tempering + holding time: periodic furnace is more than 2h. Continuous furnace is more than 1h900--960T normalizing. 700-750℃ tempering. It can also be heated to 900-960℃, furnace cooled to 700℃ and kept warm for more than 1h, air cooled to 980-1020℃ normalized, and the holding time is 1min per millimeter of wall thickness, not less than 20min. 72u～750℃ tempering, holding time, periodic furnace is more than 2h. Continuous furnace is more than 1h. When the wall thickness is greater than 30mm to 4mm, forced cooling should be carried out. When the wall thickness is greater than 40mm, quenching and tempering treatment should be carried out. Firing temperature is 950~990℃, tempering temperature is 720~760℃, holding time is more than 2h for periodic furnace 10001035r normalizing, holding time: 1.5min per meter of wall thickness, but not less than 20min. 760-790℃ tempering, holding time: periodic furnace is more than 2h. Continuous furnace is more than 1h 1040~1090℃ normalizing, holding time is 1.5min per millimeter of thickness. Not less than 20min. 72~770℃ tempering, holding time: periodic furnace is more than 2h. 2b, continuous furnace greater than 1b1040--1060℃ normalizing, holding time: 1.5min per meter thick, but not ≥ 20min, 770~790℃ tempering, holding time: periodic furnace for 2h. Continuous furnace for more than 1h solution treatment, solution overflow 1040T
solution treatment: hot rolling (extrusion, expansion) tube, solution temperature|050>℃, cold drawing (rolling> tube solid drop temperature 105℃1) When hot rolling 15MoG, 20MoG.12CrMoi, 15C:rMoG, 12Cr2MoG, 12(cr1MuVc; when the final rolling temperature of the steel pipe meets the normalizing temperature specified in Table 5, hot rolling can be used instead of normalizing:
High quality carbon inspection||tt| |Structural steel
Structural steel
Stainless steel
12CrMaG:
15CrMoc
12Cr2MoG\
12Cr1MoVG
[2C12MoWTiB
12Cr3MaVSiTiB
10Cr9MelVNh
1Ct18Ni
ICr19Ni11Nh
GB5310—1995
Mechanical properties of steel pipe
Mechanical properties
Tensile strength
410~550
450~-600||t t||410--560
440--640
450-~600
470~640
540735
610~805
Service point
Elongation
Impact power Tensile strength
Transverse mechanical properties
Service point
Elongation
Divine strike power
1) For steel pipes made of 12Cr2MuG steel, when the wall thickness is not more than 3mm and the outer diameter is not more than 30mm or when the wall thickness is greater than 16mm~4mm, the yield point is allowed to be reduced by 10MPa; when the thickness is greater than 40mm, the yield point is allowed to be reduced by 20MPa. 4.4.2 The recommended data of the minimum value of the high temperature specified non-proportional elongation stress and the endurance strength of 100,000 h of the finished pipe are shown in Appendix A (suggestive Appendix) and Appendix B (suggestive Appendix). According to the requirements of the purchaser and the test temperature is specified in the contract, the supplier can provide the high temperature specified non-proportional elongation stress value of the steel pipe (.). The value is for reference. 4.5 Process performance
4.5.1 Flattening test
Steel pipes with an outer diameter greater than 22 mm and 400 mm and a wall thickness not greater than 40 mm are subjected to flattening test. The distance between the plates after the steel pipe is fanned is calculated according to formula (2),
(1+a)s
Formula: H—distance between plates, mmt
S—nominal wall thickness of the steel pipe, mm;3 Delivery status
The steel pipe is delivered after heat treatment according to the heat treatment system specified in Table 5. The heat treatment system should be filled in the quality certificate. CB 5310-1995
200000
~90 °0
os00800
oo0oto0
000805
[~900'0~2z '0 [
~09 -1
--80 *0
-06 *0
-2t '0
~06 ℃
--60*0
--of*0
-~~2t0
00 108-0
~-2T 0
H!LISAOWEIE!
GB5310—1995
sso.ojosoo
~00°6
~00 21
4.4 Mechanical properties
GB 5310--1995
4.4.1 The mechanical properties of the steel pipe in the delivery state shall comply with the provisions of Table 6. For steel pipes with an outer diameter greater than or equal to 76mm and a wall thickness greater than or equal to 14mm, a longitudinal impact test shall be conducted. For steel pipes with an outer diameter greater than or equal to 219mm and a wall thickness greater than or equal to 25mm, a transverse mechanical property test shall be conducted instead of a longitudinal mechanical property test.
-One of the three punching test specimens is allowed to have an impact energy 30% lower than the minimum value specified in Table 6, but the arithmetic half mean of the three test specimens shall not be less than the specified value in Table 6.
Table 5 Heat treatment system of steel pipe
20MnG25MnG
15MoGu
20MoGl
12CrMoGn
15CiMoGJ
12r2MoGJ
[2CrIMnVG1
12Cr2MoWVTiE
12Cr3MoVSiTiB||t t||IoCr9MntVNh
1C+18Ni9
1Cr19NiitNb
Heat treatment system
900~930℃ normalizing, the hot rolled tube rolling temperature is not less than 9U0℃, it can replace normalizing 900~930 quenching + hot rolled tube final rolling temperature is not less than 900℃ + it can replace normalizing 910～940℃ normalizing
900~930 normalizing. 670~720℃: quenching, holding time: periodic furnace is more than 21. Continuous furnace is too much for 1h930~960C normalizing: E80~720℃ tempering + holding time: periodic furnace is more than 2h. Continuous furnace is more than 1h900--960T normalizing. 700-750℃ tempering. It can also be heated to 900-960℃, furnace cooled to 700℃ and kept warm for more than 1h, air cooled to 980-1020℃ normalized, and the holding time is 1min per millimeter of wall thickness, not less than 20min. 72u～750℃ tempering, holding time, periodic furnace is more than 2h. Continuous furnace is more than 1h. When the wall thickness is greater than 30mm to 4mm, forced cooling should be carried out. When the wall thickness is greater than 40mm, quenching and tempering treatment should be carried out. Firing temperature is 950~990℃, tempering temperature is 720~760℃, holding time is more than 2h for periodic furnace 10001035r normalizing, holding time: 1.5min per meter of wall thickness, but not less than 20min. 760-790℃ tempering, holding time: periodic furnace is more than 2h. Continuous furnace is more than 1h 1040~1090℃ normalizing, holding time is 1.5min per millimeter of thickness. Not less than 20min. 72~770℃ tempering, holding time: periodic furnace is more than 2h. 2b, continuous furnace greater than 1b1040--1060℃ normalizing, holding time: 1.5min per meter thick, but not ≥ 20min, 770~790℃ tempering, holding time: periodic furnace for 2h. Continuous furnace for more than 1h solution treatment, solution overflow 1040T
solution treatment: hot rolling (extrusion, expansion) tube, solution temperature|050>℃, cold drawing (rolling> tube solid drop temperature 105℃1) When hot rolling 15MoG, 20MoG.12CrMoi, 15C:rMoG, 12Cr2MoG, 12(cr1MuVc; when the final rolling temperature of the steel pipe meets the normalizing temperature specified in Table 5, hot rolling can be used instead of normalizing:
High quality carbon inspection||tt| |Structural steel
Structural steel
Stainless steel
12CrMaG:
15CrMoc
12Cr2MoG\
12Cr1MoVG
[2C12MoWTiB
12Cr3MaVSiTiB
10Cr9MelVNh
1Ct18Ni
ICr19Ni11Nh
GB5310—1995
Mechanical properties of steel pipe
Mechanical propertiesWww.bzxZ.net
Tensile strength
410~550
450~-600||t t||410--560
440--640
450-~600
470~640
540735
610~805
Service point
Elongation
Impact power Tensile strength
Transverse mechanical properties
Service point
Elongation
Divine strike power
1) For steel pipes made of 12Cr2MuG steel, when the wall thickness is not more than 3mm and the outer diameter is not more than 30mm or when the wall thickness is greater than 16mm~4mm, the yield point is allowed to be reduced by 10MPa; when the thickness is greater than 40mm, the yield point is allowed to be reduced by 20MPa. 4.4.2 The recommended data of the minimum value of the high temperature specified non-proportional elongation stress and the endurance strength of 100,000 h of the finished pipe are shown in Appendix A (suggestive Appendix) and Appendix B (suggestive Appendix). According to the requirements of the purchaser and the test temperature is specified in the contract, the supplier can provide the high temperature specified non-proportional elongation stress value of the steel pipe (.). The value is for reference. 4.5 Process performance
4.5.1 Flattening test
Steel pipes with an outer diameter greater than 22 mm and 400 mm and a wall thickness not greater than 40 mm are subjected to flattening test. The distance between the plates after the steel pipe is fanned is calculated according to formula (2),
(1+a)s
Formula: H—distance between plates, mmt
S—nominal wall thickness of the steel pipe, mm;3 Delivery status
The steel pipe is delivered after heat treatment according to the heat treatment system specified in Table 5. The heat treatment system should be filled in the quality certificate. CB 5310-1995
200000
~90 °0
os00800
oo0oto0
000805
[~900'0~2z '0 [
~09 -1
--80 *0
-06 *0
-2t '0
~06 ℃
--60*0
--of*0
-~~2t0
00 108-0
~-2T 0
H!LISAOWEIE!
GB5310—1995
sso.ojosoo
~00°6
~00 21
4.4 Mechanical properties
GB 5310--1995
4.4.1 The mechanical properties of the steel pipe in the delivery state shall comply with the provisions of Table 6. For steel pipes with an outer diameter greater than or equal to 76mm and a wall thickness greater than or equal to 14mm, a longitudinal impact test shall be conducted. For steel pipes with an outer diameter greater than or equal to 219mm and a wall thickness greater than or equal to 25mm, a transverse mechanical property test shall be conducted instead of a longitudinal mechanical property test.
-One of the three punching test specimens is allowed to have an impact energy 30% lower than the minimum value specified in Table 6, but the arithmetic half mean of the three test specimens shall not be less than the specified value in Table 6.
Table 5 Heat treatment system of steel pipe
20MnG25MnG
15MoGu
20MoGl
12CrMoGn
15CiMoGJ
12r2MoGJ
[2CrIMnVG1
12Cr2MoWVTiE
12Cr3MoVSiTiB||t t||IoCr9MntVNh
1C+18Ni9
1Cr19NiitNb
Heat treatment system
900~930℃ normalizing, the hot rolled tube rolling temperature is not less than 9U0℃, it can replace normalizing 900~930 quenching + hot rolled tube final rolling temperature is not less than 900℃ + it can replace normalizing 910～940℃ normalizing
900~930 normalizing. 670~720℃: quenching, holding time: periodic furnace is more than 21. Continuous furnace is too much for 1h930~960C normalizing: E80~720℃ tempering + holding time: periodic furnace is more than 2h. Continuous furnace is more than 1h900--960T normalizing. 700-750℃ tempering. It can also be heated to 900-960℃, furnace cooled to 700℃ and kept warm for more than 1h, air cooled to 980-1020℃ normalized, and the holding time is 1min per millimeter of wall thickness, not less than 20min. 72u～750℃ tempering, holding time, periodic furnace is more than 2h. Continuous furnace is more than 1h. When the wall thickness is greater than 30mm to 4mm, forced cooling should be carried out. When the wall thickness is greater than 40mm, quenching and tempering treatment should be carried out. Firing temperature is 950~990℃, tempering temperature is 720~760℃, holding time is more than 2h for periodic furnace 10001035r normalizing, holding time: 1.5min per meter of wall thickness, but not less than 20min. 760-790℃ tempering, holding time: periodic furnace is more than 2h. Continuous furnace is more than 1h 1040~1090℃ normalizing, holding time is 1.5min per millimeter of thickness. Not less than 20min. 72~770℃ tempering, holding time: periodic furnace is more than 2h. 2b, continuous furnace greater than 1b1040--1060℃ normalizing, holding time: 1.5min per meter thick, but not ≥ 20min, 770~790℃ tempering, holding time: periodic furnace for 2h. Continuous furnace for more than 1h solution treatment, solution overflow 1040T
solution treatment: hot rolling (extrusion, expansion) tube, solution temperature|050>℃, cold drawing (rolling> tube solid drop temperature 105℃1) When hot rolling 15MoG, 20MoG.12CrMoi, 15C:rMoG, 12Cr2MoG, 12(cr1MuVc; when the final rolling temperature of the steel pipe meets the normalizing temperature specified in Table 5, hot rolling can be used instead of normalizing:
High quality carbon inspection||tt| |Structural steel
Structural steel
Stainless steel
12CrMaG:
15CrMoc
12Cr2MoG\
12Cr1MoVG
[2C12MoWTiB
12Cr3MaVSiTiB
10Cr9MelVNh
1Ct18Ni
ICr19Ni11Nh
GB5310—1995
Mechanical properties of steel pipe
Mechanical properties
Tensile strength
410~550
450~-600||t t||410--560
440--640
450-~600
470~640
540735
610~805
Service point
Elongation
Impact power Tensile strength
Transverse mechanical properties
Service point
Elongation
Divine strike power
1) For steel pipes made of 12Cr2MuG steel, when the wall thickness is not more than 3mm and the outer diameter is not more than 30mm or when the wall thickness is greater than 16mm~4mm, the yield point is allowed to be reduced by 10MPa; when the thickness is greater than 40mm, the yield point is allowed to be reduced by 20MPa. 4.4.2 The recommended data of the minimum value of the high temperature specified non-proportional elongation stress and the endurance strength of 100,000 h of the finished pipe are shown in Appendix A (suggestive Appendix) and Appendix B (suggestive Appendix). According to the requirements of the purchaser and the test temperature is specified in the contract, the supplier can provide the high temperature specified non-proportional elongation stress value of the steel pipe (.). The value is for reference. 4.5 Process performance
4.5.1 Flattening test
Steel pipes with an outer diameter greater than 22 mm and 400 mm and a wall thickness not greater than 40 mm are subjected to flattening test. The distance between the plates after the steel pipe is fanned is calculated according to formula (2),
(1+a)s
Formula: H—distance between plates, mmt
S—nominal wall thickness of the steel pipe, mm;Tempering at 700-750℃. It can also be heated to 900-960℃, furnace cooled to 700℃ and kept warm for more than 1h, air cooled to 980-1020℃ normalizing, the holding time is 1min per millimeter of wall thickness, not less than 20min. 72u～750℃ tempering, holding time, periodic furnace is more than 2h. Continuous furnace is more than 1h. When the wall thickness is greater than 30mm to 4mm, forced cooling should be carried out. When the wall thickness is greater than 40mm, quenching and tempering treatment should be carried out. Firing temperature is 950~990℃, tempering temperature is 720~760℃, holding time is more than 2h for periodic furnace 10001035r normalizing, holding time: 1.5min per meter of wall thickness, but not less than 20min. 760-790℃ tempering, holding time: periodic furnace is more than 2h. Continuous furnace is more than 1h 1040~1090℃ normalizing, holding time is 1.5min per millimeter of thickness. Not less than 20min. 72~770℃ tempering, holding time: periodic furnace is more than 2h. 2b, continuous furnace greater than 1b1040--1060℃ normalizing, holding time: 1.5min per meter thick, but not ≥ 20min, 770~790℃ tempering, holding time: periodic furnace for 2h. Continuous furnace for more than 1h solution treatment, solution overflow 1040T
solution treatment: hot rolling (extrusion, expansion) tube, solution temperature|050>℃, cold drawing (rolling> tube solid drop temperature 105℃1) When hot rolling 15MoG, 20MoG.12CrMoi, 15C:rMoG, 12Cr2MoG, 12(cr1MuVc; when the final rolling temperature of the steel pipe meets the normalizing temperature specified in Table 5, hot rolling can be used instead of normalizing:
High quality carbon inspection||tt| |Structural steel
Structural steel
Stainless steel
12CrMaG:
15CrMoc
12Cr2MoG\
12Cr1MoVG
[2C12MoWTiB
12Cr3MaVSiTiB
10Cr9MelVNh
1Ct18Ni
ICr19Ni11Nh
GB5310—1995
Mechanical properties of steel pipe
Mechanical properties
Tensile strength
410~550
450~-600||t t||410--560
440--640
450-~600
470~640
540735
610~805
Service point
Elongation
Impact power Tensile strength
Transverse mechanical properties
Service point
Elongation
Divine strike power
1) For steel pipes made of 12Cr2MuG steel, when the wall thickness is not more than 3mm and the outer diameter is not more than 30mm or when the wall thickness is greater than 16mm~4mm, the yield point is allowed to be reduced by 10MPa; when the thickness is greater than 40mm, the yield point is allowed to be reduced by 20MPa. 4.4.2 The recommended data of the minimum value of the high temperature specified non-proportional elongation stress and the endurance strength of 100,000 h of the finished pipe are shown in Appendix A (suggestive Appendix) and Appendix B (suggestive Appendix). According to the requirements of the purchaser and the test temperature is specified in the contract, the supplier can provide the high temperature specified non-proportional elongation stress value of the steel pipe (.). The value is for reference. 4.5 Process performance
4.5.1 Flattening test
Steel pipes with an outer diameter greater than 22 mm and 400 mm and a wall thickness not greater than 40 mm are subjected to flattening test. The distance between the plates after the steel pipe is fanned is calculated according to formula (2),
(1+a)s
Formula: H—distance between plates, mmt
S—nominal wall thickness of the steel pipe, mm;Tempering at 700-750℃. It can also be heated to 900-960℃, furnace cooled to 700℃ and kept warm for more than 1h, air cooled to 980-1020℃ normalizing, the holding time is 1min per millimeter of wall thickness, not less than 20min. 72u～750℃ tempering, holding time, periodic furnace is more than 2h. Continuous furnace is more than 1h. When the wall thickness is greater than 30mm to 4mm, forced cooling should be carried out. When the wall thickness is greater than 40mm, quenching and tempering treatment should be carried out. Firing temperature is 950~990℃, tempering temperature is 720~760℃, holding time is more than 2h for periodic furnace 10001035r normalizing, holding time: 1.5min per meter of wall thickness, but not less than 20min. 760-790℃ tempering, holding time: periodic furnace is more than 2h. Continuous furnace is more than 1h 1040~1090℃ normalizing, holding time is 1.5min per millimeter of thickness. Not less than 20min. 72~770℃ tempering, holding time: periodic furnace is more than 2h. 2b, continuous furnace greater than 1b1040--1060℃ normalizing, holding time: 1.5min per meter thick, but not ≥ 20min, 770~790℃ tempering, holding time: periodic furnace for 2h. Continuous furnace for more than 1h solution treatment, solution overflow 1040T
solution treatment: hot rolling (extrusion, expansion) tube, solution temperature|050>℃, cold drawing (rolling> tube solid drop temperature 105℃1) When hot rolling 15MoG, 20MoG.12CrMoi, 15C:rMoG, 12Cr2MoG, 12(cr1MuVc; when the final rolling temperature of the steel pipe meets the normalizing temperature specified in Table 5, hot rolling can be used instead of normalizing:
High quality carbon inspection||tt| |Structural steel
Structural steel
Stainless steel
12CrMaG:
15CrMoc
12Cr2MoG\
12Cr1MoVG
[2C12MoWTiB
12Cr3MaVSiTiB
10Cr9MelVNh
1Ct18Ni
ICr19Ni11Nh
GB5310—1995
Mechanical properties of steel pipe
Mechanical properties
Tensile strength
410~550
450~-600||t t||410--560
440--640
450-~600
470~640
540735
610~805
Service point
Elongation
Impact power Tensile strength
Transverse mechanical properties
Service point
Elongation
Divine strike power
1) For steel pipes made of 12Cr2MuG steel, when the wall thickness is not more than 3mm and the outer diameter is not more than 30mm or when the wall thickness is greater than 16mm~4mm, the yield point is allowed to be reduced by 10MPa; when the thickness is greater than 40mm, the yield point is allowed to be reduced by 20MPa. 4.4.2 The recommended data of the minimum value of the high temperature specified non-proportional elongation stress and the endurance strength of 100,000 h of the finished pipe are shown in Appendix A (suggestive Appendix) and Appendix B (suggestive Appendix). According to the requirements of the purchaser and the test temperature is specified in the contract, the supplier can provide the high temperature specified non-proportional elongation stress value of the steel pipe (.). The value is for reference. 4.5 Process performance
4.5.1 Flattening test
Steel pipes with an outer diameter greater than 22 mm and 400 mm and a wall thickness not greater than 40 mm are subjected to flattening test. The distance between the plates after the steel pipe is fanned is calculated according to formula (2),
(1+a)s
Formula: H—distance between plates, mmt
S—nominal wall thickness of the steel pipe, mm;
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