Standard No.:	GJB 3325A-2019
English Name:	Specification for ultra-high strength steel forgings for aerospace solid rocket motors
Chinese Name:	航天固体火箭发动机用超高强度钢锻件规范
Professional Classification:	GJB    Professional Standard - Military
Issued on:	2019-12-08
Implemented on:	2020-1-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	5500 words
Translation Price(USD):	240.0
Delivery:	via email in 1 business day

GJB 3325A-2019 Specification for ultra-high strength steel forgings of aerospace solid rocket motor 1 Scope This standard specifies the requirements for ultra-high strength steel forgings of aerospace solid rocket motors. This standard applies to hot-rolled forgings of 30Si2MnCrMoVE, 31Si2MnCrMoVE and 30Cr3SiNiMoVA. It may apply to hot-rolled rings by reference. 2 Normative References The following normative documents contain provisions which, through reference in this text, constitute provisions of this specification. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this specification. However, parties using this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. GB/T 222 Permissible tolerances for chemical composition of steel products GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total silicon content - Reduced molybdosilicate spectrophotometric method 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 223.19 Methods for chemical analysis of iron, steel and alloy - The neocuproine-chloroform extraction photometric method for the determination of copper content GB/T 223.23 Iron, steel and alloy - Determination of nickel content - The dimethylglyoxime spectrophotometric method GB/T 223.26 Iron, steel and alloy - Determination of molybdenum content - The thiocyanate 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 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 231.1 Metallic materials - Brinell hardness test - Part 1: Test method GB/T 1979 Standard diagrams for macrostructure and defect of structural steels GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing GB/T 4161 Metallic materials - Determination of plane-strain fracture toughness GB/T 4336 Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method) GB/T 6394 Determination of estimating the average grain size of metal GB/T 10561-2005 Determination of content of nonmetallic inclusions in steel - Micrographic method using standard diagrams GB/T 12362 Die forging tolerances and machining allowances GB/T 13299 Steel - Determination of microstructure GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition

Contents Foreword i 1 Scope 2 Normative References 3 Requirements 4 Quality assurance requirements 5 Preparation for delivery 6 Matters to be noted