Standard No.:	QJ 500A-1998
English Name:	Technical Specifications for Carbon Steel or Alloy Structural Steel Forgings
Chinese Name:	碳素钢、合金结构钢锻件技术条件
Chinese Classification:	V11    Metal casting and forging materials used for aviation and aerospace
Professional Classification:	QJ    Professional Standard - Aerospace
ICS Classification:	49.025.10 49.025.10    Steels 49.025.10
Source Content Issued by:	China Aerospace Corporation
Issued on:	1998-08-05
Implemented on:	1999-2-5
Status:	valid
Superseding:	QJ 500-1989
Target Language:	English
File Format:	PDF
Word Count:	8000 words
Translation Price(USD):	240.0
Delivery:	via email in 1 business day

QJ 500A-1998 Specification for carbon steel forgings and alloy structural steel forgings 1 Scope 1.1 Subject content This specification specifies the classification, requirements and quality assurance requirements of carbon steel forgings and alloy structural steel forgings. 1.2 Application scope This specification is applicable to carbon steel and alloy structural steel free forgings, die forgings and rolled forgings for aerospace products. 1.3 Classification According to the working conditions, stress conditions, importance, and the stability of raw materials and processes of the parts, forgings are classified into three classes: I, II, and III. a. Class I forgings: Parts intended for service under working conditions involving complex stresses, shock, vibration and heavy loads. If such a part fails or is damaged, it will directly lead to serious consequences for the product, resulting in a class accident, or although the part is not subject to high stress, its damage will endanger personal safety or cause system function failure, leading to significant economic losses. b. Class II forgings: Parts intended for service under working conditions involving fixed heavy loads and moderate shock and vibration. If such a part fails or is damaged, it may directly cause the failure or damage of other parts or components. Once damaged during service, such a part will affect the normal operation of a certain part of the product, but will not lead to a class accident or endanger personal safety, nor will it cause system function failure. c. Class III forgings: Parts intended for service under fixed loads without shock or vibration; or parts that are subject to small loads, for which strength calculation is not required and a large safety factor is applied; as well as forgings other than those of the two classes mentioned above. 2 Normative references GB/T 222-84 Method of sampling steel for determination of chemical composition and permissible variations for product analysis GB/T 223.1-81 Determination of carbon content in iron, steel and alloy GB/T 223.2-81 Determination of sulphur content in iron, steel and alloy GB/T 223.3-88 Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane phosphomolybdate gravimetric method for the determination of phosphorus content GB/T 223.4-88 Methods for chemical analysis of iron, steel and alloy - The volumetric method for determination of manganese content by ammonium nitrate oxidation GB/T 223.5-88 Methods for chemical analysis of iron, steel and alloy - The oxalic acid-ferrous sulfate molybdosilicate blue complex photometric method for the determination of silicon content GB/T 223.6-94 Methods for chemical analysis of iron, steel and alloy - The neutralization titrimetric method for the determination of boron content GB/T 223.7-81 Determination of iron content in alloy and powder GB/T 223.8-91 Methods for chemical analysis of iron, steel and alloy - The sodium fluoride separation-EDTA volumetric method for the determination of aluminium content GB/T 223.9-89 Methods for chemical analysis of iron, steel and alloy－The chrom azurol S photometric method for the determination of aluminium content GB/T 223.10-91 Methods for chemical analysis of iron, steel and alloy－The cupferron separation-chrome azurol S photometric method for the determination of aluminium content GB/T 223.11-91 Methods for chemical analysis of iron, steel and alloy - The ammonium persulfate oxidation volumetric method for the determination of chromium content GB/T 223.12-91 Methods for chemical analysis of iron, steel and alloy - The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content GB/T 223.13-89 Methods for chemical analysis of iron, steel and alloy－The ammonium ferrous sulfate volumetric method for the determination of vanadium content GB/T 223.14-89 Methods for chemical analysis of iron, steel and alloy - The N-benzoyl-N-phenylhydroxylamine extraction photometric method for the determination of vanadium content GB/T 223.15-82 Chemical analysis of iron, steel and alloy - The determination of titanium by gravimetric method GB/T 223.16-91 Methods for chemical analysis of iron, steel and alloy - The chromotropic acid photometric method for the determination of titanium content GB/T 223.17-89 Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane photometric method for the determination of titanium content GB/T 223.18-94 Methods for chemical analysis of iron, steel and alloy - The sodium thiosulfate separation iodimetric method for the determination of copper content GB/T 223.19-89 Methods for chemical analysis of iron, steel and alloy - The neocuproine-chloroform extraction photometric method for the determination of copper content GB/T 223.20-94 Methods for chemical analysis of iron, steel and alloy - The potentiometric titration method for the determination of cobalt content GB/T 223.21-94 Methods for chemical analysis of iron, steel and alloy - The 5-Cl-PADAB spectrophotometric method for the determination of cobalt content GB/T 223.22-94 Methods for chemical analysis of iron, steel and alloy - The nitroso-R-salt spectrophotometric method for the determination of cobalt content GB/T 223.23-94 Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime spectrophotometric method for the determination of nickel content GB/T 223.24-94 Methods for chemical analysis of iron, steel and alloy - The extraction separation - The dimethylglyoxime spectrophotometric method for the determination of nickel content GB/T 223.25-94 Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime gravimetric method for the determination of nickel content GB/T 223.26-89 Methods for chemical analysis of iron, steel and alloy - The thiocyanate direct photometric method for the determination of molybdenum content GB/T 223.27-94 Methods for chemical analysis of iron, steel and alloy - The thiocyanate-butyl acetate extraction spectrophotometric method for the determination of molybdenum content GB/T 223.28-89 Methods for chemical analysis of iron, steel and alloy - The α-benzoinoxime gravimetric method for the determination of molybdenum content GB/T 223.29-84 Methods for chemical analysis of iron, steel and alloy - The xylenol orange photometric method for determination of lead content after carrier precipitation GB/T 223.30-94 Methods for chemical analysis of iron, steel and alloy - The arsenazo III spectrophotometric method for the determination of zirconium content after separation by p-bromomandelic acid GB/T 223.31-94 Methods for chemical analysis of iron, steel and alloy - The distillation-molybdenum blue spectrophotometric method for the determination of arsenic content GB/T 223.32-94 Methods for chemical analysis of iron, steel and alloy - The hypophosphite reduction-iodimetric method for the determination of arsenic content GB/T 223.33-94 Methods for chemical analysis of iron, steel and alloy - The chlorophosphonago mA photometric method for the determination of cerium content after extraction separation GB/T 223.34-84 Methods for chemical analysis of iron, steel and alloy - The determination of hydrochloric acid-insoluble content of iron powders GB/T 223.35-85 Methods for chemical analysis of iron, steel and alloy - The pulse heating inert gas fusion-coulometric titration method for the determination of oxygen content GB/T 223.36-94 Methods for chemical analysis of iron, steel and alloy - The neutral titration method for the determination of nitrogen content after distillation separation GB/T 223.37-89 Methods for chemical analysis of iron, steel and alloy - The indophenol blue photometric methods for the determination of nitrogen content after distillation separation GB/T 223.38-85 Methods for chemical analysis of iron, steel and alloy - The anion-exchange separation-gravimetric method for the determination of niobium content GB/T 223.40-85 Methods for chemical analysis of iron, steel and alloy - The anion-exchange separation-sulphochlorophenol S photometric method for the determination of niobium content GB/T 223.41-85 Methods for chemical analysis of iron, steel and alloy - The anion-exchange separation-pyrogallol photometric method for the determination of tantalum content GB/T 223.42-85 Methods for chemical analysis of iron, steel and alloy - The anion-exchange separation-bromopyrogallol red photometric method for the determination of tantalum content GB/T 223.43-94 Methods for chemical analysis of iron, steel and alloy - Determination of tungsten content GB/T 223.45-94 Methods for chemical analysis of iron, steel and alloy - The cupral separation-xylidyl blue Ⅱ photometric method for the determination of magnesium content GB/T 223.46-89 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric methods for the determination of magnesium content GB/T 223.47-94 Methods for chemical analysis of iron, steel and alloy - The carrier precipitation-molybdenum blue potometric method for the determination of antimony content GB/T 223.48-85 Methods for chemical analysis of iron, steel and alloy - The semixylenol orange photometric method for the determination of bismuth content GB/T 223.49-94 Methods for chemical analysis of iron, steel and alloy - Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare tarth content GB/T 223.50-94 Methods for chemical analysis of iron, steel and alloy - The phenylfluorone-CTMAB direct photometric method for the determination of tin content GB/T 223.51-87 Methods for chemical analysis of iron, steel and alloy - The 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol photometric method for the determination of zinc content GB/T 223.52-87 Methods for chemical analysis of iron, steel and alloy - The hydroxylamine hydrochloride - Iodometric method for the determination of selenium content GB/T 223.53-87 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrophotometric method for the determination of copper content GB/T 223.54-87 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrophotometric method for the determination of nickel content GB/T 223.55-87 Methods for chemical analysis of iron, steel and alloy - The direct oscillopolarographic method for the determination of tellurium content GB/T 223.56-87 Methods for chemical analysis of iron, steel and alloy - The sulfhydryl cotton fiber separation-oscillopolarographic method for the determination of tellurium content GB/T 223.57-87 Methods for chemical analysis of iron, steel and alloy - The extraction-absorption catalytic polarographic method for the determination of cadmium content

Contents 1 Scope 2 Normative references 3 Requirements 4 Quality assurance requirements 5 Preparation for delivery 6 Explanatory notes Additional explanation: