Some standard content:
People's Republic of China
National Standard
High-temperature alloy hot-rolled steel plate
GB/T14995-94
China Standards Press
National Standard of the People's Republic of China
High-temperature alloy hot-rolled plate
Hot-rolled heat-resisting superalloy platesGB/T14995-94
Replaces GBn179-82
This standard applies to nickel-based and iron-based high-temperature alloy hot-rolled plates with a thickness of 4~14mm and a service temperature of 600~950℃, which can be used for high-temperature load-bearing components in aviation, aerospace, gas turbines and other industries. 1 Dimensions and Appearance
1.1 Dimensions and Permissible Deviations
1.1.1 The thickness of the plate is 414mm. The specific specifications shall be determined by negotiation between the supply and demand parties and shall be indicated in the contract. 1.1.2 The allowable deviation of the thickness, width and length of the plate shall comply with the relevant provisions of GB709-65 "Types of Hot-rolled Thick Steel Plates". 1.1.2.1 When the purchaser has special requirements, the supplier can supply plates with reduced thickness deviations by agreement between the two parties, and this should be noted in the contract. 1.1.2.2 According to the purchaser's requirements, the supplier can supply 3-4mm hot-rolled plates, and the allowable thickness deviation should be in accordance with the deviation regulations of 4mm hot-rolled plates.
1.1.3 After agreement between the supplier and the purchaser, delivery can be made in multiple lengths, and rounded corners are allowed. Plates with short lengths due to sample collection are allowed to be delivered in one piece per furnace (when the delivery is not less than 100 pieces, two pieces are allowed per furnace). 1.2 Unevenness
The unevenness of the plate in the delivery state shall not be greater than 10mm per meter. 2 Technical requirements
2.1 Grade and chemical composition
2.1.1 The grade and chemical composition (melting analysis) of the alloy shall conform to the requirements of Table 1 and 2.1.1.1~2.1.1.4. Approved by the State Bureau of Technical Supervision on April 4, 1994, and implemented on May 1, 1994
GB/T14995—94
100'0>
080~S0
08°0~
02°0~
09°0~
0°91~
10°91~
00°9~
80°0>
80°0V
80°0>
90°0>
GB/T14995—94
2.1.1.1 Either T or Nb can be added to GH1035 alloy, and both shall not be added at the same time. When GH1140 alloy is smelted in electric arc furnace, AI+Ti<1.55%; when smelted in electric furnace with electroslag or vacuum, A1+Ti2.1.1.2
<1.75%.
The presence of Pa is allowed in GH3039 alloy.
The Cu content of GH3030 and GHB3039 alloys shall not be greater than 0.20%, and the Cu content of other alloys shall be reported as analysis results. 2.1.1.4
2.1.2 Allowable deviation of chemical composition of finished plate When chemical analysis is performed on finished plate (when the purchaser inspects or the purchaser requires the supplier to inspect the chemical composition of finished plate), the allowable deviation of chemical composition of GH1140 alloy plate shall not exceed the following provisions: W
specified deviation.
With the consent of the purchaser, the chemical composition of the finished plate is also allowed to be no more than that specified in Table 4 of GB/T14992 "High Temperature Alloy Grades". 2.2 Smelting Method
The alloy shall be produced by the smelting method approved by the competent authorities of both the supply and demand parties, and shall be indicated in the quality certificate. Other smelting methods that meet the requirements of this standard may also be used for production after consultation between the supply and demand parties. 2.3 Delivery Status
The plate shall be delivered in the state after solution treatment, pickling, leveling and trimming. 2.4 Mechanical Properties
2.4.1 The mechanical properties of the plate in the delivery state shall comply with the provisions of Table 2. Table 2
New grade
GH1035
GH1131
GH1140
Original grade
Test sample status
Delivery status
Delivery status
Delivery status
Instantaneous tensile
Tensile strength
kgf/mm2
Elongation
Not less than
Sectional reduction rate
New grade
GH2018
GH2132
GH2302
GH3030
GH3039
GH3044
GH3128
Basis.
Original brand
GB/T14995-94
Continued Table 2
Test sample status
Delivery status+800±10℃×16 hours, air cooling
Delivery status+700～720℃×12~16 hours, air cooling
Delivery status
Delivery status+800±10℃×16 hours, air cooling
Delivery status
Delivery status
Delivery status
Delivery status +1200℃, air cooling
Instantaneous tensile properties
Shrinkage of area
Tensile strength
kgf/mm?
Elongation
Not less than
When the plate thickness is less than 7mm, the supplier only provides the measured data of mechanical properties and fills it in the quality certificate without making any judgment
For the high temperature tensile property test of GH1131 and GH2132 alloys, the supplier only conducts one temperature test. When it is not specified in the contract, the test shall be conducted at 650℃ and 900℃ respectively. 2.4.1.3
Basis.
GB/T14995-94
Except for GH1140 and GH3039 alloys as specified in Table 2, the other grades shall report the actual measured results and no judgment shall be made. 2.4.2 When the purchaser has special requirements and needs to add high temperature endurance performance, the performance requirements and test conditions (temperature, stress, fracture time, etc.) shall be determined by negotiation between the supply and demand parties and shall be indicated in the contract or agreement. 2.4.3 The recommended solution treatment system for the delivery status plate shall be carried out in accordance with the provisions of Table 3 (plate temperature). The supplier shall indicate the actual solution treatment system of the finished plate in the quality certificate.
GH1035
GH1131
GH1140
GH2018
GH2132
GH2302
GH3030
GH3039
GH3044
GH3128
2.5 Low power inspection
Finished product solution treatment system
1100~1140℃, air cooling
1130~1170℃, air cooling
1050~1090℃, air cooling
1100~1150℃, air cooling
980~1000℃, air cooling
1100~1130℃, air cooling
980~1020℃, air cooling
1050~1090℃, air cooling
1120~1160℃, air cooling
1140~1180℃, air cooling
The transverse macrostructure of the plate should not have shrinkage marks, inclusions, cracks, voids and pinholes. The inspection of transverse macrostructure is carried out on the alloy plate.
With the consent of the purchaser, the supplier can carry out ultrasonic flaw detection on the intermediate piece by piece instead of transverse macrostructure inspection. 2.6 Grain size
The plate should be inspected for grain size in the delivery state, and the actual measurement results should be reported and noted in the quality certificate. It is not used as a basis for judgment. 2.7 Ultrasonic flaw detection
The plate should be ultrasonically tested one by one, and the inspection results should not be stratified. 2.8 Surface quality
The surface of the plate in the delivery state should be smooth and flat, without scars, heavy skin, oxide skin, pits, and traces of over-pickling. The following defects are allowed on both sides of the plate within the deviation range (not exceeding the minimum thickness of the plate): general and local abrasions, scratches, roller indentations and small pits.
GB/T14995-94
Any defects exceeding the above provisions are allowed to be removed along the rolling direction with a fine grinding wheel with a grain size finer than 80, but the minimum thickness of the plate must be guaranteed. The cleaning area is not specified.
3 Inspection method
3.1 Size measurement method
The plate should be measured piece by piece using common dry ruler, steel tape measure and other measuring tools. The thickness of the plate should be measured at a distance of not less than 100mm from the top corner of the plate and not less than 20mm from each edge. 3.2 Method of measuring unevenness
Put the plate freely and lightly on the inspection half-table, and use a universal ruler to measure the maximum value of the wave peak or protrusion height minus the plate thickness value along the length or width direction of the plate.
3.3 Method of surface quality inspection
The surface quality of the plate should be inspected by naked eyes one by one. 3.4 Chemical analysis method,
3.4.1 The sampling method for chemical analysis of alloys shall be in accordance with the relevant provisions of GB22263 "Method for sampling samples for chemical analysis of steel", and one sample shall be taken from each furnace. For plates finally produced by electroslag or vacuum arc furnace, the elements C, A1, and T shall be sampled and analyzed from the head and tail of the ingot, and other specified analysis elements shall be sampled and analyzed only from the head of the ingot. 3.4.2 The chemical analysis of the plate can be carried out according to the general method, but the arbitration analysis shall be carried out according to YB790-75 "Chemical Analysis Method of High Temperature Alloys". The arbitration analysis method of the chemical analysis method of elements not specified or not applicable in YB790-75 shall be determined by negotiation between the supply and demand parties.
3.5 Ultrasonic flaw detection method
Ultrasonic flaw detection of plates can be carried out according to the supplier's general method or the method agreed upon by the supplier and the buyer. 3.6 Low-power, high-power and mechanical property test methods 3.6.1 Each batch of specimens for low-power, high-power and mechanical property tests should be cut in the transverse direction (perpendicular to the rolling direction) at a distance of not less than 50mm from the plate or the edge of the plate, but the supplier should ensure that the longitudinal properties of the alloy plate must meet the requirements of this standard. 3.6.2 The number, location and test method of the specimens cut from each test plate should be as specified in Table 4. Table 4
Test Items
Board Transverse Low Power
Grain Size
Room Temperature Tensile
High Temperature Tensile
Number of Samples
Test Method
GB/T14999.2—94
GB/T14999.4—94
GB228-76
YB941-78
Sampling Location
One End One Tail
One Side One Middle
One Side One Middle
One Side One Middle
Note: When the plate thickness is not less than 7.0mm, the mechanical properties test specimen specification adopts round specimen. When it is less than 7.0mm, non-standard specimens can be prepared. 3.6.3 When the purchaser retests, the high temperature tensile and high temperature endurance tests can be carried out according to other common methods. 4 Inspection rules
4.1 Acceptance
The acceptance of plates shall be conducted by the technical supervision department of the supplier, and the purchaser shall have the right to inspect the plates in accordance with the provisions of this standard. 4.2 Batches
GB/T14995-94
The plates shall be submitted for inspection in batches, and each batch shall consist of plates of the same alloy grade, furnace number, size and heat treatment system. 4.2.11
4.2.2 For plates of the same alloy grade, furnace number and heat treatment system, if their thickness is the same but their length and width are different, they may be sampled and inspected from the same batch.
4.2.3 The number of plates selected for each batch for inspection shall be as follows: 1 plate for less than 100 plates;
2 plates for 100 plates or more.
4.3 Re-inspection
4.3.1 When a test result does not meet the requirements of this standard, it is allowed to take double the number of samples for re-inspection of the unqualified item. The sample should be cut from the original unqualified plate. If the re-inspection result is still unqualified, the whole batch of plates should be scrapped. 4.3.2 The supplier has the right to classify and reprocess (heat treatment, rolling, etc.) the plates that fail the re-inspection and submit them as a new batch for acceptance. The number of batches of the same batch of plates shall not exceed two. 4.4 Quality objection
After receiving the materials from the supplier, the purchaser shall inspect the materials as soon as possible in accordance with the provisions of this standard. If the materials are found to be unqualified in the inspection, they shall be immediately reported to the supplier. When the supplier receives the quality objection from the purchaser, it shall also negotiate with the purchaser in a timely manner. 4.5 Arbitration test
When the supply and demand parties have differences on a test result, the arbitration test shall be conducted by an arbitration unit agreed by both parties or designated by the competent department. The high temperature tensile test and high temperature endurance test methods shall be determined by the arbitration unit. 4.6 Handling of metallurgical defects
When the demander finds metallurgical defects on finished or semi-finished parts and the defects are confirmed by both parties, the supplier shall return the goods and make up for them when the demander requests. If the supplyer and the demander are unable to determine the nature of the defects, they may request arbitration by an arbitration unit designated by the superior department or agreed by both parties in order to make a final conclusion. 5 Packaging, marking and quality certificate
5.1 Plates shall be marked with obvious marks on each sheet, indicating the alloy grade, furnace number and specification. 5.2 The same batch of plates shall be tightly packed into bundles for delivery, and the weight of each bundle shall not exceed 2t. When the demander has special requirements for packaging, it shall be indicated in the contract.
5.3 Each batch of plates shall be hung with a label indicating: alloy grade, furnace number, specification, number of sheets, weight and supplier name. 5.4 Each batch of alloy plates supplied shall be accompanied by the supplier's quality certificate. The quality certificate shall include the supplier's name, buyer's name, contract number, standard number, alloy grade, smelting method, furnace number, specification, number of sheets, weight, delivery date and various inspection results specified in this standard or contract or agreement (including secondary inspection results if re-inspection is carried out), and shall be stamped with the seal of the technical supervision department. 5.5 In addition to the requirements specified in this standard, other requirements for packaging, marking and quality certificates shall be in accordance with GB247-80 "General Provisions for Acceptance, Packaging, Marking and Quality Certificates of Steel Plates and Strips". Additional Notes:
This standard was proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard was drafted by Fushun Steel Plant.
The main drafters of this standard are Li Yi and Yao Yongfeng. This standard is entrusted to the Standardization Institute of the Ministry of Metallurgy for interpretation. Book number: 155066·0-14995
China Standards Press
Printed in December 1997
Price 8.00 yuan3 The number of plates selected for each batch of inspection is as follows: 1 plate for less than 100 plates;
2 plates for 100 or more plates.
4.3 Re-inspection
4.3.1 When a certain inspection result does not meet the requirements of this standard, it is allowed to take double the number of samples for re-inspection of the unqualified item. The sample should be cut from the original unqualified plate. If the re-inspection result is still unqualified, the whole batch of plates should be scrapped. 4.3.2 The supplier has the right to classify and reprocess (heat treatment, rolling, etc.) the plates that fail the re-inspection and submit them as a new batch for acceptance. The number of batches of the same batch of plates shall not exceed two times. 4.4 Quality objection
After receiving the materials from the supplier, the purchaser shall inspect the materials as soon as possible in accordance with the provisions of this standard. If the materials are found to not meet the requirements of this standard during the inspection, they shall be immediately reported to the supplier. When the supplier receives the quality objection from the purchaser, it shall also negotiate with the purchaser in a timely manner. 4.5 Arbitration test
When the supplier and the buyer disagree on the results of a test, the arbitration test shall be conducted by an arbitration unit agreed by both parties or designated by the competent department. The high-temperature tensile and high-temperature endurance test methods shall be determined by the arbitration unit. 4.6 Handling of metallurgical defects
When the buyer finds metallurgical defects on finished or semi-finished parts and the defects are confirmed by the supplier and the buyer, the supplier shall return the goods and make up for them when the buyer requests. If the supplier and the buyer are unable to determine the nature of the defects, they may request arbitration by an arbitration unit designated by the superior department or agreed by both parties in order to make a final conclusion. 5 Packaging, marking and quality certificate
5.1 The plates shall be marked with obvious marks one by one, indicating the alloy grade, furnace number and specification. 5.2 The same batch of plates shall be tightly packed into bundles for delivery, and the weight of each bundle shall not exceed 2t. When the buyer has special requirements for packaging, it shall be indicated in the contract.
5.3 Each batch of plates shall be hung with a label indicating: alloy grade, furnace number, specification, number of sheets, weight and supplier name. 5.4 Each batch of alloy plates supplied shall be accompanied by the supplier's quality certificate. The quality certificate shall include the supplier's name, buyer's name, contract number, standard number, alloy grade, smelting method, furnace number, specification, number of sheets, weight, delivery date and various inspection results specified in this standard or contract or agreement (if re-inspection is carried out, the secondary inspection results shall be included), and the stamp of the technical supervision department shall be stamped. 5.5 In addition to the requirements specified in this standard, other requirements for packaging, marking and quality certificates shall be in accordance with GB247-80 "General Provisions for Acceptance, Packaging, Marking and Quality Certificates of Steel Plates and Strips". Additional Notes:
This standard was proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard was drafted by Fushun Steel Plant.
The main drafters of this standard are Li Yi and Yao Yongfeng. This standard is entrusted to the Standardization Research Institute of the Ministry of Metallurgy for interpretation. Book number: 155066·0-14995
China Standards Press
Printed in December 1997
Price 8.00 yuan3 The number of plates selected for each batch of inspection is as follows: 1 plate for less than 100 plates;
2 plates for 100 or more plates.
4.3 Re-inspectionwwW.bzxz.Net
4.3.1 When a certain inspection result does not meet the requirements of this standard, it is allowed to take double the number of samples for re-inspection of the unqualified item. The sample should be cut from the original unqualified plate. If the re-inspection result is still unqualified, the whole batch of plates should be scrapped. 4.3.2 The supplier has the right to classify and reprocess (heat treatment, rolling, etc.) the plates that fail the re-inspection and submit them as a new batch for acceptance. The number of batches of the same batch of plates shall not exceed two times. 4.4 Quality objection
After receiving the materials from the supplier, the purchaser shall inspect the materials as soon as possible in accordance with the provisions of this standard. If the materials are found to not meet the requirements of this standard during the inspection, they shall be immediately reported to the supplier. When the supplier receives the quality objection from the purchaser, it shall also negotiate with the purchaser in a timely manner. 4.5 Arbitration test
When the supplier and the buyer disagree on the results of a test, the arbitration test shall be conducted by an arbitration unit agreed by both parties or designated by the competent department. The high-temperature tensile and high-temperature endurance test methods shall be determined by the arbitration unit. 4.6 Handling of metallurgical defects
When the buyer finds metallurgical defects on finished or semi-finished parts and the defects are confirmed by the supplier and the buyer, the supplier shall return the goods and make up for them when the buyer requests. If the supplier and the buyer are unable to determine the nature of the defects, they may request arbitration by an arbitration unit designated by the superior department or agreed by both parties in order to make a final conclusion. 5 Packaging, marking and quality certificate
5.1 The plates shall be marked with obvious marks one by one, indicating the alloy grade, furnace number and specification. 5.2 The same batch of plates shall be tightly packed into bundles for delivery, and the weight of each bundle shall not exceed 2t. When the buyer has special requirements for packaging, it shall be indicated in the contract.
5.3 Each batch of plates shall be hung with a label indicating: alloy grade, furnace number, specification, number of sheets, weight and supplier name. 5.4 Each batch of alloy plates supplied shall be accompanied by the supplier's quality certificate. The quality certificate shall include the supplier's name, buyer's name, contract number, standard number, alloy grade, smelting method, furnace number, specification, number of sheets, weight, delivery date and various inspection results specified in this standard or contract or agreement (if re-inspection is carried out, the secondary inspection results shall be included), and the stamp of the technical supervision department shall be stamped. 5.5 In addition to the requirements specified in this standard, other requirements for packaging, marking and quality certificates shall be in accordance with GB247-80 "General Provisions for Acceptance, Packaging, Marking and Quality Certificates of Steel Plates and Strips". Additional Notes:
This standard was proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard was drafted by Fushun Steel Plant.
The main drafters of this standard are Li Yi and Yao Yongfeng. This standard is entrusted to the Standardization Research Institute of the Ministry of Metallurgy for interpretation. Book number: 155066·0-14995
China Standards Press
Printed in December 1997
Price 8.00 yuan
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