Standard No.:	GJB 6055-2007
English Name:	Specification for 907A prefiled military ship
Chinese Name:	舰艇用907A型钢规范
Professional Classification:	GJB    Professional Standard - Military
Issued on:	2007-08-06
Implemented on:	2007-11-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	5500 words
Translation Price(USD):	165.0
Delivery:	via email in 1 business day

GJB 6055-2007 Specification for 907A prefiled of military ship 1 Scope This specification specifies the technical requirements, quality assurance requirements and delivery preparation for 907A prefiled of military ship. This specification is applicable to the 5 and 18 gauge cast 907A bulb flat steel and 907A angle steel with a side thickness not exceeding 14mm, which are used in structures of military ship. 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 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, the latest editions of the normative document referred to applies. GB 222-1984 Method of sampling steel for determination of chemical composition and permissible variations for product analysis GB/T 223.5 Methods for chemical analysis of iron, steel and alloy - The reduced molybdosilicate spectrophotometric method for the determination of acid-soluble silicon content GB/T 223.11 Methods for chemical analysis of iron, steel and alloy - The ammonium persulfate oxidation volumetric method for the determination of chromium 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 Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime spectrophotometric method for the determination of nickel content GB/T 223.59 Methods for chemical analysis of iron, steel and alloy - The reduced molybdoantimonyl phosphoric acid photometric method for the determination of phosphorus content GB/T 223.64 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of manganese content 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 Methods for chemical analysis of iron, steel and alloy - The gas-volumetric method after combustion in the pipe furnace for the determination of carbon content GB/T 228 Metallic materials - Tensile testing at ambient temperature GB/T 229 Metallic materials - Charpy notch impact test GB/T 232 Metallic materials - Bend test GB 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 9787 Hot-rolled equal-leg angle steel - Dimensions, shape, weight and tolerances GB 9788 Hot-rolled unequal-leg angle steel - Dimensions, shape, weight and tolerances GB 9945-1988 Bulb flat steel for shipbuilding 3 Requirements 3.1 Smelting method Oxygen converter or electric furnace smelting shall be adopted for the steel. 3.2 Chemical composition 3.2.1 Composition I (Code: 907A-I)

Contents Foreword II 1 Scope 2 Normative references 3 Requirements 4 Quality assurance requirements 5 Delivery preparation 6 Instructions