Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This specification replaces GJB 2294-1995 Specification for stainless and heat-resisting steel bars for aviation.
The following main technical changes have been made with respect to GJB 2294-1995:
a) The separate smelt method of the electric arc furnace is canceled;
b) New method for representing grades is adopted, and the comparison between new and old grades is added;
c) The grade 12Cr17Mn9Ni4N and relevant technical requirements are added;
d) The two grades of precipitation hardening stainless steel, 0Cr17Ni4Cu4Nb and 0Cr17Ni7Al, as well as relevant technical requirements are deleted;
e) The grades of 2Cr3WMoV pearlitic heat-resistant steel and relevant technical requirements are deleted;
f) The inspection types and qualification levels of nonmetallic inclusions are modified;
g) The inspection methods and qualification levels of macrostructure of electroslag remelting steel are modified;
h) The re-inspection and judgment rules are modified.
This specification was proposed by the Electronic Information Base Department of the General Armaments Department of the PLA.
This specification was issued in May 1995 for the first time.
Specification for stainless and heat-resisting steel bars for aviation
1 Scope
This specification specifies the requirements for stainless and heat-resisting steel bars for aviation.
This specification is applicable to forged, rolled, cold-drawn and silvery stainless and heat-resisting steel bars for aviation whose sectional dimensions (diameter, side length or distance across flats) are not more than 250mm.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this specification. For dated reference, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this specification. However parties to agreements based on this specification are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references or references with version not indicated, the latest edition of the normative document referred to applies.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane phosphomolybdate gravimetric method for the determination of phosphorus content
GB/T 223.4 Alloyed steel - Determination of manganese content - Potentiometric or visual titration method
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.8 Methods for chemical analysis of iron, steel and alloy－The sodium fluoride separation-EDTA titration method for the determination of aluminium content
GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method
GB/T 223.13 Methods for chemical analysis of iron, steel and alloy－The ammonium ferrous sulfate titration method for the determination of vanadium content
GB/T 223.14 Methods for chemical analysis of iron, steel and alloy－The N-benzoy-N-phenylhydroxylamine extraction photometric method for the determination of vanadium content
GB/T 223.16 Methods for chemical analysis of iron, steel and alloy - The chromotropic acid photometric method for the determination of titanium content
GB/T 223.17 Methods for chemical analysis of iron steel and alloy - The diantipyrylmethane photometric method for the determination of titanium content
GB/T 223.25 Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime gravimetric method for the determination of nickel content
GB/T 223.26 Iron steel and alloy - Determination of molybdenum content - The thiocyanate spectrophotometric method
GB/T 223.36 Methods for chemical analysis of iron, steel and alloy - The neutral titration method for the determination of nitrogen content after distillation separation
GB/T 223.40 Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.43 Iron steel and alloy - Determination of tungsten content - Gravimetric method and spectrophotometric method
GB/T 223.58 Methods for chemical analysis of iron, steel and alloy - The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
GB/T 223.59 Iron steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy - The perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.61 Methods for chemical analysis of iron, steel and alloy - The ammonium phosphomolybdate volumetric method for the determination of phosphorus content
GB/T 223.62 Methods for chemical analysis of iron, steel and alloy - The butyl acetate extraction photometric method for the determination of phosphorus content
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium (potassium) periodate photometric method for the determination of manganese content
GB/T 223.64 Iron steel and alloyed - Determination of manganese content - Flame atomic absorption spectrometric method
GB/T 223.67 Iron, steel and alloy - Determination of sulfur content - Methylene blue spectrophotometric method
GB/T 223.68 Methods for chemical analysis of iron, steel and alloy - The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content
GB/T 223.69 Iron, steel and alloy - Determination of carbon contents - Gas-volumetric method after combustion in the pipe furnace
GB/T 223.71 Methods for chemical analysis of iron, steel and alloy - The gravimetric method after combustion in the pipe furnace for the determination of carbon content
GB/T 223.72 Iron steel and alloy - Determination of sulfur content - Gravimetric method
GB/T 226 Test method for macrostructure and defect of steel by etching
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1: Test method
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method
GB/T 702-2008 Hot-rolled steel bars - Dimensions, shape, weight and tolerances
GB/T 905-1994 Dimension, shape, weight and tolerance for cold-drawn round, square and hexagonal steels
GB/T 908-2008 Forged bars - Dimensions shape weight and tolerances
GB/T 1979 Standard diagrams for macrostructure and defect of structural steels
GB/T 2101 General requirement of acceptance, packaging, marking, and certification for section steel
GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing
GB/T 3207-2008 Bright steel
GB/T 4162-2008 Forged and rolled steel bars - Method for ultrasonic testing
GB/T 4226-2009 Cold finished stainless steel bar
GB/T 4334-2008 Corrosion of metals and alloys - Test methods for intergranular corrosion of stainless steels
GB/T 6394 Metal-methods for estimating the average grain size
GB/T 10121 Steel products - Method for magnetic particle inspection of tower sample
GB/T 10561-2005 Steel - Determination of content of nonmetallic inclusions - Micrographic method using standards diagrams
GB/T 11170 Stainless steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/T 15711 Steel products－Method for etch test of tower sample
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
GB/T20123 Steel and iron - Determination of total carbon and sulfur content - Infrared absorption method after combustion in an induction furnace (routine method)
GB/T 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (routine method)
GB/T 20878 Stainless and heat-resisting steels - Designation and chemical composition
YB/T 4402-2014 Micrographic method for determining content of δ-ferrite in martensitic stainless steel
YB/T 5293 Metallic materials - Forging test
ASTM A604 Standard practice for macroetch testing of consumable electrode remelted steel bars and billets
3 Requirements
3.1 Smelting method
The steel shall be smelted by using electric arc furnace + secondary refining, electric arc furnace + secondary refining + electroslag remelting, or non-vacuum induction furnace + electroslag remelting. As agreed upon between the supplier and the demander, other smelting methods may also be adopted. The specific smelting method shall be indicated in the contract.
3.2 Grades and chemical compositions
3.2.1 The grades and chemical compositions (melting analysis) of steel shall meet those specified in Table 1.
Foreword i
1 Scope
2 Normative references
3 Requirements
4 Quality assurance requirements
5 Preparation for delivery
6 Instructions
Codeofchina.com is in charge of this English translation. In case of any doubt about the English translation, the Chinese original shall be considered authoritative.
This specification replaces GJB 2294-1995 Specification for stainless and heat-resisting steel bars for aviation.
The following main technical changes have been made with respect to GJB 2294-1995:
a) The separate smelt method of the electric arc furnace is canceled;
b) New method for representing grades is adopted, and the comparison between new and old grades is added;
c) The grade 12Cr17Mn9Ni4N and relevant technical requirements are added;
d) The two grades of precipitation hardening stainless steel, 0Cr17Ni4Cu4Nb and 0Cr17Ni7Al, as well as relevant technical requirements are deleted;
e) The grades of 2Cr3WMoV pearlitic heat-resistant steel and relevant technical requirements are deleted;
f) The inspection types and qualification levels of nonmetallic inclusions are modified;
g) The inspection methods and qualification levels of macrostructure of electroslag remelting steel are modified;
h) The re-inspection and judgment rules are modified.
This specification was proposed by the Electronic Information Base Department of the General Armaments Department of the PLA.
This specification was issued in May 1995 for the first time.
Specification for stainless and heat-resisting steel bars for aviation
1 Scope
This specification specifies the requirements for stainless and heat-resisting steel bars for aviation.
This specification is applicable to forged, rolled, cold-drawn and silvery stainless and heat-resisting steel bars for aviation whose sectional dimensions (diameter, side length or distance across flats) are not more than 250mm.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this specification. For dated reference, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this specification. However parties to agreements based on this specification are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references or references with version not indicated, the latest edition of the normative document referred to applies.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane phosphomolybdate gravimetric method for the determination of phosphorus content
GB/T 223.4 Alloyed steel - Determination of manganese content - Potentiometric or visual titration method
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.8 Methods for chemical analysis of iron, steel and alloy－The sodium fluoride separation-EDTA titration method for the determination of aluminium content
GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration or potentiometric titration method
GB/T 223.13 Methods for chemical analysis of iron, steel and alloy－The ammonium ferrous sulfate titration method for the determination of vanadium content
GB/T 223.14 Methods for chemical analysis of iron, steel and alloy－The N-benzoy-N-phenylhydroxylamine extraction photometric method for the determination of vanadium content
GB/T 223.16 Methods for chemical analysis of iron, steel and alloy - The chromotropic acid photometric method for the determination of titanium content
GB/T 223.17 Methods for chemical analysis of iron steel and alloy - The diantipyrylmethane photometric method for the determination of titanium content
GB/T 223.25 Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime gravimetric method for the determination of nickel content
GB/T 223.26 Iron steel and alloy - Determination of molybdenum content - The thiocyanate spectrophotometric method
GB/T 223.36 Methods for chemical analysis of iron, steel and alloy - The neutral titration method for the determination of nitrogen content after distillation separation
GB/T 223.40 Iron, steel and alloy - Determination of niobium content by the sulphochlorophenol S spectrophotometric method
GB/T 223.43 Iron steel and alloy - Determination of tungsten content - Gravimetric method and spectrophotometric method
GB/T 223.58 Methods for chemical analysis of iron, steel and alloy - The sodium arsenite-sodium nitrite titrimetric method for the determination of manganese content
GB/T 223.59 Iron steel and alloy - Determination of phosphorus content - Bismuth phosphomolybdate blue spectrophotometric method and antimony phosphomolybdate blue spectrophotometric method
GB/T 223.60 Methods for chemical analysis of iron, steel and alloy - The perchloric acid dehydration gravimetric method for the determination of silicon content
GB/T 223.61 Methods for chemical analysis of iron, steel and alloy - The ammonium phosphomolybdate volumetric method for the determination of phosphorus content
GB/T 223.62 Methods for chemical analysis of iron, steel and alloy - The butyl acetate extraction photometric method for the determination of phosphorus content
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy - The sodium (potassium) periodate photometric method for the determination of manganese content
GB/T 223.64 Iron steel and alloyed - Determination of manganese content - Flame atomic absorption spectrometric method
GB/T 223.67 Iron, steel and alloy - Determination of sulfur content - Methylene blue spectrophotometric method
GB/T 223.68 Methods for chemical analysis of iron, steel and alloy - The potassium iodate titration method after combustion in the pipe furnace for the determination of sulfur content
GB/T 223.69 Iron, steel and alloy - Determination of carbon contents - Gas-volumetric method after combustion in the pipe furnace
GB/T 223.71 Methods for chemical analysis of iron, steel and alloy - The gravimetric method after combustion in the pipe furnace for the determination of carbon content
GB/T 223.72 Iron steel and alloy - Determination of sulfur content - Gravimetric method
GB/T 226 Test method for macrostructure and defect of steel by etching
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1: Test method
GB/T 231.1 Metallic materials - Brinell hardness test - Part 1: Test method
GB/T 702-2008 Hot-rolled steel bars - Dimensions, shape, weight and tolerances
GB/T 905-1994 Dimension, shape, weight and tolerance for cold-drawn round, square and hexagonal steels
GB/T 908-2008 Forged bars - Dimensions shape weight and tolerances
GB/T 1979 Standard diagrams for macrostructure and defect of structural steels
GB/T 2101 General requirement of acceptance, packaging, marking, and certification for section steel
GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing
GB/T 3207-2008 Bright steel
GB/T 4162-2008 Forged and rolled steel bars - Method for ultrasonic testing
GB/T 4226-2009 Cold finished stainless steel bar
GB/T 4334-2008 Corrosion of metals and alloys - Test methods for intergranular corrosion of stainless steels
GB/T 6394 Metal-methods for estimating the average grain size
GB/T 10121 Steel products - Method for magnetic particle inspection of tower sample
GB/T 10561-2005 Steel - Determination of content of nonmetallic inclusions - Micrographic method using standards diagrams
GB/T 11170 Stainless steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)
GB/T 15711 Steel products－Method for etch test of tower sample
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition
GB/T20123 Steel and iron - Determination of total carbon and sulfur content - Infrared absorption method after combustion in an induction furnace (routine method)
GB/T 20124 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (routine method)
GB/T 20878 Stainless and heat-resisting steels - Designation and chemical composition
YB/T 4402-2014 Micrographic method for determining content of δ-ferrite in martensitic stainless steel
YB/T 5293 Metallic materials - Forging test
ASTM A604 Standard practice for macroetch testing of consumable electrode remelted steel bars and billets
3 Requirements
3.1 Smelting method
The steel shall be smelted by using electric arc furnace + secondary refining, electric arc furnace + secondary refining + electroslag remelting, or non-vacuum induction furnace + electroslag remelting. As agreed upon between the supplier and the demander, other smelting methods may also be adopted. The specific smelting method shall be indicated in the contract.
3.2 Grades and chemical compositions
3.2.1 The grades and chemical compositions (melting analysis) of steel shall meet those specified in Table 1.
Contents of GJB 2294A-2014
Foreword i
1 Scope
2 Normative references
3 Requirements
4 Quality assurance requirements
5 Preparation for delivery
6 Instructions
