Standard No.:	GB 1220-1992
English Name:	Stainless steel bars
Chinese Name:	不锈钢棒
Chinese Classification:	H44    Profile steel and deformed steel
Professional Classification:	GB    National Standard
ICS Classification:	77.140.60 77.140.60    Steel bars and rods 77.140.60
Source Content Issued by:	State Technical Supervision Bureau
Issued on:	1992-01-01
Implemented on:	1993-6-1
Status:	superseded
Superseded by:	GB/T 1220-2007 Stainless steel bars
Superseded on:	2007-12-1
Abolished on:	2007-12-01
Superseding:	GB 1220-1984 Stainless steel bars
Target Language:	English
File Format:	PDF
Word Count:	11000 words
Translation Price(USD):	330.0
Delivery:	via email in 1 business day

1 Subject content and applicable scope This standard specifies the dimension, shape, technical requirements, test methods, acceptance rules, as well as packaging, marking and quality certificate for stainless steel bars. This standard is applicable to hot-rolled and forged stainless steel bars with the dimensions no more than 250 mm and the chemical composition also applicable to steel ingots and billets. 2 Normative references GB 222 Method of sampling steel for determination of chemical composition and permissible variations for product analysis GB 223 Methods for chemical analysis of iron, steel and alloy GB 226 Etch test for macrostructure and defect of steels GB 228 Metallic materials - Tensile testing GB 229 Metallic materials - Charpy impact test (U-notch) GB 230 Metallic materials－Rockwell hardness test GB 231 Metallic materials - Brinell hardness test GB 233 Metallic materials - Forging test GB 702 Hot-rolled round and square steels - Dimension, shape, weight and tolerance GB 704 Dimensions, shape, weight and tolerances for hot-rolled flats GB 705 Hot-rolled hexagonal and octagonal steel bars - Dimensions, shape, weight and tolerance GB 908 Forged round and square steels - Dimension, shape, weight and tolerance GB 1979 Standard diagrams for macrostructure and defect of structural steels GB 2101 General requirement of acceptance, packaging, marking, and certification for section steel GB 2975 Rules for sampling in mechanical and technological testing of steel products GB 4334.1 Method of 10 percent oxalic acid etch test for stainless steels GB 4334.2 Method of ferric sulfate-sulfuric acid test for stainless steels GB 4334.3 Method of 65 percent nitric acid test for stainless steels GB 4334.4 Method of nitric-hydrofluoric acid test for stainless steels GB 4334.5 Method of copper sulfate-sulfuric acid test for stainless steels GB 4334.6 Test method for stainless steels in 5% sulfuric acid GB 4340 Metallic materials - Vickers hardness test method GB 6394 Metal-methods for estimating the average grain size GB 6397 Metallic materials - Test pieces for tensile testing GB 10121 Steel products - Method for magnetic particle inspection of tower sample GB 10561 Steel - Determination of content of non-metallic inclusion - Micrographic method using standard diagrams YB 47 Testing method of hair cutting pattern in tower lathe YB 201 Varieties of flat steel forged by structural steel 3 Classification 3.1 Steel bars shall be classified by the processing methods to be used into the following two types. The processing methods used for the steel bars shall be indicated in the contract, and those not indicated shall be regarded as machining. a steel for press working (hot press working, billets for upset forging and cold drawing); b steel for machining.

1 Subject content and applicable scope 2 Normative references 3 Classification 4 Dimension, shape and tolerance 5 Technical requirements 6 Test methods 7 Inspection rules 8 Packaging, marking and quality certificate Annex A (Informative) Characteristics and uses of stainless steel Annex B (Informative) Comparison table of stainless steel designations in this Standard and those of other Countries