GB 4239-1991 Cold-rolled stainless steel and heat-resistant steel strip
Some standard content:
urc 669. 14. 018. 8-418
National Standard of the People's Republic of China
GB4239—91
Cold rolled stainless steel and heat-resisting steel strips
Cold rolled stainless steel and heat-resisting steel strips1991-03-26Promulgated
Implemented on 1991-11-01
State Bureau of Technical Supervision
National Standard of the People's Republic of China
Cold rolled stainless steel and heat-resisting steel strips1Subject content and applicable scope
CB 4239—91
Replaces GB4239-84
GB2598—81
(Potential resistance part)
This standard specifies the product classification, dimensions, technical requirements, test methods, packaging marks and quality certificates of stainless steel and heat-resistant steel cold-rolled strips.
This standard applies to cold-rolled stainless steel and heat-resistant steel strips with a thickness of ≤4mm (hereinafter referred to as steel strips). 2 Referenced standards
GB 222
GB 230
GB 232
GB 708
GB2975
GB3076
Methods for sampling samples for chemical analysis of steel and allowable deviations of chemical composition of finished products Chemical analysis methods for steel and alloys
Methods for tensile testing of metals
Methods for testing Rockwell hardness of metals
Methods for bending testing of metals
General provisions for acceptance, packaging, marking and quality certification of steel plates and strips Dimensions, shapes, weights and allowable deviations of cold-rolled steel plates and strips Sampling methods for mechanical and process performance tests of steel materials Tensile testing methods for metal sheets (strips)
GB 4334. 1
GB 4334. 2
GB 4334. 3
GB 4334. 4
GE 4334. 5
GB 4334. 6
GB 4340
GB 6397
3 Terminology
10% oxalic acid corrosion test method for stainless steel
Sulfuric acid-ferric sulfate corrosion test method for stainless steelStainless steel
65% nitric acid corrosion test method
Nitric acid-hydrofluoric acid corrosion test method for stainless steelStainless steel
Vegetable acid-copper sulfate corrosion test method
5% sulfuric acid corrosion test method for stainless steel
Gold-end Vickers hardness test method
Metal drawing test specimen
Terminology symbols are:
Soft steel strip
Low cold-work hardening steel strip
Semi-cold-work hardening steel strip
Cold-work hardening steel strip
Special cold-work hardening steel strip
Trimmed steel strip
Untrimmed steel strip
Approved by the Technical Supervision Department of the State Council on March 26, 1991
1991-11 01 Implementation
Width Ordinary Precision Steel Strip
Width High Precision Steel Strip
Product Classification
Categories and Brands
4239 -- 91
Steel strips are divided into five categories according to the organization to be levied, with a total of 48 brands. The categories and brands are listed in Table 1. Table
Classification and grades
Austenite type
Note: The grades in brackets are not recommended,
1Cr:7Mn6Ni5N
[Cr18Mn8Ni5N
2Cr13Mn9Ni1
ICr17Ni?
ICr17Ni8
1Cr18Nig
iCr18Ni95i3
OCr18Ni9
COC19N10
CC-19N11 (NhN
ICt12N1(IN
1Cr1HNi1?
CCr2HNi13
(Cr25Ni20
(Cr 17Ni12M02
Q0Cr17Nil4Mo2
OCt7Ni12Mo2N
C0Cr17Ni13Mo2N
QCr 18Ni12Mo2Cu2
00Cr18Ni14Ma2Cu2
OCr19M113Mo3
00Cr19NI13M03
#Cr1RN116Ma5
(1Cr18Ni9Ti)
OCr18N10Ti
(②)Other brands other than those in Table 1 may be supplied upon agreement between the two parties. The surface processing grade and its requirements shall be in accordance with the provisions in Table 2. 4.2
Austenite
Austenite-ferrite
Ferrite
Martensite
Precipitation hardening
OCrt8Nii1Nb
(KCrIRNi13S14
Cr26Ni5M02
: 00r24Ni6MD3N
：0Cr13Al
1Cr17M
00r17Ma
018Ma2
ODC30Mo2
0[Cr27M
OCT17Ni7A1
Surface processing grade
Dimensions, shape
Ring surface
GB4239-- 91
Table 2 Surface processing
Heat treatment, pickling or corresponding treatment after cold rolling
Heat treatment, pickling or similar treatment after cold rolling. Finally, the rough surface is lightly cold-rolled and then heat treatment, pickling or similar treatment is performed. Finally, the appropriate smoothness is obtained by rolling. The particle size specified in GB 2477 is 100-~120 For polishing and finishing of No. 1 grinding material, the particle size specified in GB 2477 is 150--180. For polishing finishing of No. 1 wear-resistant material, the particle size specified in GB 2477 is 240. For polishing finishing of No. 3 grinding material, the particle size specified in GB2477 is W6. For burning finishing of No. 53 grinding material, the particle size specified in GB 2177 is W50. After cold rolling, bright heat treatment is carried out. Use grinding material of appropriate particle size to polish so that the surface has continuous graining. 5.1 The standard thickness of steel strip is specified as C.30, 0.40, 0.50, 0.60, 0.70 0.80, 0.90, 1.00, 1.20, 1.50, 2.00, 2.50 3.0m. 3.50mm.
5.2 The allowable deviation of the thickness of steel strip shall be as specified in Table 3 and Table 1. The accuracy grade of steel strips with a width greater than 600mm shall be specified in the contract. If not specified, the accuracy grade B shall be used. When specified in the contract, the allowable deviation of the steel strip can be limited to the positive or negative side. However, the tolerance value at this time shall be equal to the common value specified in Table 3 and Table 4. 5.2.1 The allowable deviation of the thickness of strips with a width greater than 1250mm shall be in accordance with the accuracy grade A in GB70 standard. 5.2.2 The thickness tolerance of steel strip delivered in pickling state may exceed the negative tolerance of Table 3 and Table 4. The excess value is as follows: 0.01 mm for thickness <0.9 mm; 0.02 mm for thickness 20.9 mm. Allowable thickness tolerance 0.05~0.10 >0.10~~0.15 >0.15~0.25 20.25~0.45 >0.45~0.65 >0.65~0.90 >0.90--1. 20 | 50-~1. 80
21. 80-~2. 00
2. 00~2. 30
>2. 30--2.50
> 2. 50-- 3. 10
>3. 10~<.4. 00
0.05~0.10
>0. 10--0 . 15
>0. 15~0. 25
>0. 250. 45
>0. 45~0.65
>0. 65~0. 90
>0.90~1.20
>1. 20~1. 50||tt ||>1. 50~1. 80
>1, 80--2. 00
>2. 00~2. 30
>2. 30~2. 50
>2. 50 ~~3. 10
>3. 10~<4. 00
20--150
± 0. 070
CB4239—91
Continue the table?
Thickness allowable deviation
>150~250
± 0. 090
Table 4 Thickness allowable deviation
>250~400||tt| |-- 0. 070
Thickness tolerance
Higher precision (A)
>6001000
± 0. 060wwW.bzxz.Net
± 0 . 070
>1 000--1 250
>400--600
- 0, 060
±.080
General accuracy ( ）
>600～1250
±0, 110
GB4239—91
5.3 The allowable deviation of the width of the steel strip is in accordance with the provisions of Table 5 for ordinary precision (P). If specified in the contract, it may also be in accordance with the provisions of Table 6 for advanced precision (K). , according to the requirements of the purchaser and indicated in the contract. The allowable deviation of the steel strip width can be limited to the positive or negative side, but the tolerance letter at this time should be consistent with the tolerance specified in Table 5 or Table G. Table 5 Width normal accuracy (P) allowable deviation
Width allowable deviation
Edge state
Trimmed steel strip
Untrimmed steel strip|| tt||20--50
0. 05~~ 0. 50
>0. 50--1. 00
>1. 00 -- 1. 50|| tt||*1.5[~2. 5]
2. 50~4. 00
>50--150
20-~150
150--250
2>250 --400
400--600
Advanced precision of trimmed steel strip width (K) Allowable deviation Allowable deviation
>150~250
>250~ 400
>600--: 000>1 000-1 250
>400~600
5.4 The allowable deviation of the width of the steel strip with a width of 1250mm shall be in accordance with the provisions of GB708 standard . 5.5 The camber of trimmed steel strip is stipulated as follows: for widths of 20 to 50 mm, it shall not exceed 3 mm per meter; for widths greater than 50 mm, it shall not exceed 2 mm per meter. b.
5.6 Marking example:|| tt||>600~1000
Made of 1Ct18Ni9 steel, thickness 0.5 mm, width -100 mm, low cold work hardening, cold rolled surface, cut reverse, width is a strip with higher precision, Its mark is:
Steel strip 1Ct18Ni9-0.5×100-DY-N0.1-QK-GB 4239-916 Technical requirements
6.1 Chemical composition
6. 1.1 The chemical composition of steel (melting analysis) is as specified in Table 7~: 5
Icr17Mn6NiN
[CrJ8Mn8Ni5N
2Cr13Mn9Ni4
ICr17Ni7
ICT17NIR|| tt||ICr1BNi9
1C118NI9S3
OCt18Ni9
Q0Cr19NI10
OCr19Ni9N
OC11gNi t ONbN
OGCr18N1UN
1CrI8Ni12
OCr23Ni18
OCr25Ni20
(Cr1 7Ni12M02
00Cr17Ni14Mo2
UCrI7Ni12Mo2N
00Ct17Ni13Mo2N
DCr1 8Ni12Mo2Cu2
oocrlaNiliMu2cu2
DCr19Ni13Mo3
00Cr19Ni13Ma3
OCr18Ni16M05
1C18N9
OCr18Ni1OTi
0C18Ni11Nb
OCr18Ni13Si41| |tt||GB 4239 --- 91
0. 15 ~- 0. 25
0. 08--0. 12
.0. 0a
.0. 08
Note: 1) 0Ct18Ni135i4, alloy elements other than those listed in the table may be added if necessary. Si
2. 00~3. 00
3. 00 ~~ 5. 00
5.5D--7.50
7. 50~-1G. 00| |tt||8.00--1C.00
Table 7 Austenitic type
≤: 0. 035
Chemical composition of steel
.0.030
3. 50--5. 50
4, 00--G, CD
3.70- ~5.C0
, ~8,
7. 00--9.00
8, [0-]0,
8. 00--10.00
. [0--11. 00
8.00 --12.00
7. ~-11.50
7. 50 -~ 10. 50| |tt||H. 50~-11. 50
10. 50 ~ 13. 00
12. 00 ~-15. 00
19.00~22.00
10.00~-14. 00
12. 00~15. 00
10. 00--14. 00
[0. 50 ~- 14. 50
10. 00-~ 14. 00
12. 00~~16. 00
11. 00-- 15. 00
11, 00~ 15. 00
15 . 00--17. 00
8. 00~-11. 00
9. 00-~12. 00
9. 00 ~-13. 00
11. 50~15. 00
4239—91||tt ||16. 00-~18. 00
:7. 00~~19. 01
12. 00~~14. 00
*6. 00~18. 00
16. 00-~18. 00
17. 00~-19. 00
17. 00. ~ 19. 00
17. 00-- 10. 00
18.00-~20. 00
18, 00~-20. 00
18.00~20. 00
17. 0D--19. 00|| tt||17.0-~19. 00
22. 00--24. 00
24. 0~26. 0
16. 00--18. 00
16 , 0~ 1x. (e)
16. 00-~ 18. 00
16. 50~-18. 50
17. 00-~ 19. 00
17. ~. 19. 00
18. 00-~20. 00
18 . 00~-20. 00
16. 00~19. 00
17. 00--19, 00
17. 00~~19. 00
17.00--19.00
15,00~20,00
2. 00-~3. 00|| tt||2. 00 ~ 3. 00
2. 00 ~~ 3. 00
2. 00--3. 00
1. 20~2. 75
1. 20--2. 75
3. 00~~4 . 00
3. 00--4.00
4. 00~~6.心
0. 10~0. 25
.15~-0.30
0. 12~ 0. 22
0. 10~0. 22
0. 12--0. 22|| tt||Gul. 00-- 2, 50
Cul, 00~2. 50
5(C% --0. 02) ~ 0. 80%
Ti5×C%
N610XC%
IKr26Ni5Mn2
DOCI2INiEMaN
31oCr13A1
3200cr12
3500Ct17
1Cr17Mo
3700ct17Mo
3800Cr18M02
3900r80Mn2
400027Mo
GB4239
Austenite-ferrite steel Chemical composition
0.081,00*1.50 0.0350.030:3.00~6. 0023. 0028. 00:1. 00 ~3. 00N
≤40. 031. 001. 50 0. 0400. 030,4. 50~-7. 50 22. 00~26. 00 2. 50 --4. 000. 08-- 0. 30Table 9
Chemical composition of ferritic steel
0.0350.03011.50-14.50
41. 001. 00
0. 0301.001. 000. 0350. 030
11.00--13. 50
*1. 001. 000. 0350. 030, 14, 00--16. 000. 751. 000. 0350. 030 16. 00~18. 000.0300.751.00
00.0360. 030
16.00~19.00
0.75~1.25
1. 001. 0040.035≤0. 030| 16. 00~18. 000.0251.001.00
≤0.035 ≤0. 030
≤0. 025≤1. 001. 00≤0. 035≤0. 0300. 0100. 400.400.03040.020
16.00.~19. 00
17,00~20.00
28.50--32.00
0.0100.400400.0300.02025.00--27.500 . 75~1. 25
1. 76~2. 50
1. 50-- 2. 50
0. 75~- 1. 50
Lithium ：(I) Except for 00Cr30Mo2 and 00Cr27Mo steels, other steels are allowed to contain less than or equal to 0.60% mirror, N
A10. 10--0.30
Ti or Nb0.10~1.00
Ti.Nb, Zr alone or
total 8(C% -
N %6) --0. 80%
(2) 00Cr30Mo2, 00Ct27Mo are allowed to contain less than or equal to 0.50% nickel, less than or equal to 0.20% copper, and Ni+Cu should be ≤0.50% Table 10 Martensitic steel Chemical composition
0. 16~ 0. 26
0. 26 0. 40
0. 25~-0. 40
0. 60~~0 . 75
Note: ① The grades listed in the table are allowed to contain less than or equal to 0. ②7Cr17 can be deeply added with less than or equal to 0.75% molybdenum. Table 11 Chemical composition of DCr17Ni7A1 precipitation hardening steel, % <0.03540.030 <0.030 <11 , 50~13. 00
11, 50~~13, 50
11. 50--13. 50
12.0014. 00
12. 00~- 14. 00
15. 00~~17, 00
16.00-~18, 00
6. 50~7. 75 6. 00~18. 0d 0. 75 ~ 1, 00GB4239—91
6.1.2 When conducting finished product analysis (inspection by the purchaser or inspection by the supplier according to the purchaser's requirements), the allowable deviation value shall comply with the provisions of Table 3 in GB222 standard. For elements that are not applicable to Table 3 Or chemical composition specifications, and shall be implemented in accordance with the agreement between the supplier and the buyer. 6.2 Delivery Status
Steel strips shall generally be delivered in coils. It shall be noted in the contract that they may be delivered in straight strips. After cold rolling, the steel strips shall be heat treated as specified in Tables 12 to 16 and pickled or similarly treated. Pickling is not required after bright heat treatment. However, for heat treatment of precipitation hardened steel strips, the purchaser shall specify the type of heat treatment and shall state whether heat treatment of the steel strip or heat treatment of the sample is necessary. The steel strips may be straightened, ground or cold rolled to varying degrees. Table 12 Heat treatment system of austenitic steel strip No.
1Cr17MnGNi5N
1C-18Mn8Ni5N
2C-13Mn9Ni4
1Cr17Ni?
1Cr17Ni8
ICri8Ni9
ICrI8Ni9Si3
OCraNig
o0Cr19Ni1Q
OCr19NiSN
OCr 1SNI1 0NbN
00Cr18N10N
1Cr18NI12
DCr23Ni13
Solution treatment,
1 010~1 120 Rapid cooling
1 010~1 120 fast insurance
1 000~1 150 fast insurance
1 0101 150 fast insurance
1 010 ~1 150 fast cooling
1 010~1 150 fast cooling
1 010--1 150 fast cooling
1 010~-1 150 fast insurance
1 010-~1 150 fast cooling
1 010~1 150 fast selection
1010~1150 fast clean
1 010~1 150 fast cooling
1 010~1 150 fast cooling
1 030~1 150 Fast cooling
0C25Ni20
0Cr 17Ni12Mo2
00Cr17Ni 14M02
(Cr17Ni12Mo2N
00Cr17Ni13Mo2N
DCr 1 8Ni1 2M02Cu2
00Cr18Ni14Mo2Cu2
DCr19Ni13Mo2
00Cr 19N13Mo3
0Cr18Ni16Mo5
1G18N9
C+18NI11T
OGr18Ni11Nb
OCr18N113S14
solution treatment,
1 030~-1 180 rapid cooling
1 1%~:1 150 rapid cooling
11%~1150 rapid cooling
1 010~1 150 rapid cooling
1 010~1 150 rapid cooling
1 010~1 150 rapid cooling
1 010~1 150 rapid cooling
1 010~1 150 Quick cooling
1 010~1150Quick cooling
1 030--1 180 Quick cooling
1 000--1 10D Quick cooling
920--1150Quick cooling
980~1150Quick cooling
1 010~1 150Quick cooling
Note: For 0cr18Ni11T1, 0Cr1aN111Nb, the buyer may require stabilization treatment, at which time the heat treatment temperature is 850~930℃. Table 13 Heat treatment system of austenitic-ferritic steel strip Brand
OCr13Al
00cr12
0Cr26N15M02
0OC:24Ni6M03N
Table 14 Heat treatment system of ferritic steel strip Fire treatment,
780~830 Quick cooling or slow cooling
700~820 Quick cooling or slow cooling
780~850 Quick cooling or slow cooling
780~850 Quick cooling or slow cooling
780~950 Quick cooling or slow cooling ||t t||1Cr17Mo
00Cr17Mo
00Cr18Mo2
00Ct30Mo2
00CT27Mc
solution treatment, C
950~1100fast cooling
50~110fast cooling
annealing treatment,
780~850fast cooling or slow cooling
800~1050fast cooling
800~1050fast cooling
900~~1050fast cooling
900~~1 050 Quick cooling
GB4239
Table 15 Heat treatment system of martensitic steel strip Hot
About 750 Quick cooling or
800~-900 Short cooling
800~-900 Slow cooling
800900 Slow cooling
About 75 Empty or
800~900 Slow cooling
B00~900 Slow cooling
B0D~900 Cold
B00~900 Slow cooling
Note: (1) When the purchaser requires, annealing and tempering can be used. Annealing and tempering can be used instead of annealing to meet the requirements of mechanical properties. 980~1040 Quick cooling
1 010~1 070 Rapid cooling
Table 16 Heat treatment system of precipitation hardening steel strip No.
(Cr17N17AI
6.3 Mechanical properties
Solid solution treatment
565℃ aging
510℃ aging
Heat treatment system
10001100t: Rapid cooling
150~.400 Air cooling
15~.400 Air cooling
After solution treatment, keep at 760±15 for 90min. Cool to below 15℃ within!h, keep for 30min, then heat to 565±1cC and keep for 90min, then air cool After solution treatment, keep at 955±10℃ for 10min, air cool to room temperature, cool to 73℃ within 24=6C and keep for 8h, then heat to 510 =10℃ for 60 min and then air-cooled. The mechanical properties of all types of steel strips shall comply with the provisions of 6.3.1 to 6.3.5 of this standard. For the strength of kitchenware, it shall be measured only when the purchaser requires it (specified in the contract).
When several hardness tests are listed in parallel, one of the methods can be used for inspection according to the different sizes and states of the steel strips. 6.31 The mechanical properties of austenitic steel strips shall comply with the following provisions: 6.3.1.1 The mechanical properties of austenitic steel strips after solidification treatment shall comply with the provisions in Table 17. 6.3.1.2 The mechanical properties of steel strips delivered in different degrees of cold work hardening state shall comply with the provisions in Table 1R. Table 17 Mechanical properties of austenitic steel strips after hardening treatment Tensile test
Serial number Country
1Cr17Mn6Ni5N
1Cr18Mn8NI5N
2Cr13Mn9N14
1Cr17N17
1Cr17Ni8
Yield strength.2
not less than
tensile strength
not less than
elongation ds
not less than
hardness test
not more than
not more than ten
ICriaNig
1Ct18Ni9Si3
OCrJ8No
00Cr19N10
OCr19N19N||tt ||OCr19Ni1ONhN
0Cr18N10N
1CtIKNi12
0Cr23N113
C125Ni20||tt ||OCr17Ni12Mo2
00Cr17Ni14M02
DCr17Ni12Mo2N
DOCr17Ni13Mo2N
OCr18Ni12Mo2Cu2
00Ct18Ni14Ma?Cu2
0r19N113M3
CDCr19Ni13M03||tt| |OGr1RNi16Mo5
ICrlaNigTi
OCr18Ni10n
OCr18NIINb
OCr18Ni13$1 4
423997
Continued Table 17
Tensile test
Degree of service 40.3
Not less than
Tensile strength
Not less than
Elongation point
Not less than
3Mechanical properties of steel strips in different cold work hardening states Table 18
2Cr13Mn9NE4
State symbol
Cancer service strength o 2
Not less than
Tensile strength
Not less than
Hardness test
Not greater than
Elongation,
Not less than
2:0. 4 ~-0. 8
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