GB/T 4240-2009 Stainless Steel Wire and Its Related Standards Introduction

GB/T 4240-2009 Introduction to stainless steel wire and related standards
This standard specifies the terms and definitions, ordering content, classification and grade, size, shape and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of stainless steel wire. 
This standard applies to stainless steel wire (hereinafter referred to as steel wire), but does not include austenitic and precipitation hardening stainless spring steel wire, cold heading forging and welding stainless steel wire. 
This standard is modified to adopt ASTM A580:1998 (2004) "Stainless Steel Wire" (English version). 
Due to the legal requirements of China and the special needs of the industry, this standard was modified when adopting ASTM A580:1998 (2004) standard. A list of technical differences and their reasons is given in Appendix B for reference. 
This standard replaces GB/T4240-1993 "Stainless Steel Wire". Compared with GB/T4240-1993, the main changes are as follows: 
--- Added terms and definitions; 
--- Added delivery status for some grades; 
--- Added surface status regulations; 
--- Expanded diameter range, soft steel wire from 0.05 mm~14.0 mm to 0.05 mm~16.0 mm, light drawn steel wire from 0.50 mm~14.0 mm to 0.30 mm~16.0 mm, cold drawn steel wire from 0.50 mm~6.00 mm to 0.10 mm~12.0 mm; 
--- Cancelled marking examples; 
--- Expanded coil inner diameter; 
--- Modified the grade representation method; 
--- Modified the number of grades, deleted 0Cr19Ni9N, Y1Cr18Ni9Se, 0Cr18Ni11Ti, 0Cr18Ni11Nb, 00Cr19Ni11, 1Cr17Ni2, 9Cr18, a total of 7 grades, and added 12Cr17Mn6Ni5N There are 20 brands in total; the brands have increased from 23 to 36; 
--- Modified chemical composition; 
--- Adjusted mechanical properties, tightened some indicators; 
--- Modified the gauge length of tensile test specimens; 
--- Added elongation for reference for steel wire with diameter less than 1.0mm; 
--- Modified packaging regulations; 
--- Added Appendix A and Appendix B. 
Appendix A and Appendix B of this standard are both informative appendices. 
The previous versions of the standards replaced by this standard are: --- GB/T4240-1984, GB/T4240-1993. 

Cited standards
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions are applicable to this standard. 
GB/T222 Permissible deviation of chemical composition of finished steel products 
GB/T223.3 Chemical analysis methods for steel and alloys - Determination of phosphorus content by diantipyryl methane phosphomolybdic acid gravimetric method 
GB/T223.4 Determination of manganese content in steel and alloys - Potentiometric titration or visual titration method 
GB/T223.5 Determination of acid-soluble silicon and total silicon content in steel - Reduced silicomolybdate spectrophotometric method 
GB/T223.8 Chemical analysis methods for steel and alloys - Determination of aluminum content by sodium fluoride separation-EDTA titration method 
GB/T223.11 Chemical analysis methods for steel and alloys - Determination of chromium content by ammonium persulfate oxidation volumetric method 
GB/T223.17 Chemical analysis methods for steel and alloys - Determination of titanium content by diantipyryl methane photometric method 
GB/T223.18 Chemical analysis methods for steel and alloys - Determination of copper content by sodium thiosulfate separation-iodine titration method 
GB/T223.23 Determination of nickel content in steel, iron and alloy - Dimethylglyoxime spectrophotometric method 
GB/T223.25 Methods for chemical analysis of steel, iron and alloy - Dimethylglyoxime gravimetric method for determination of nickel content 
GB/T223.26 Determination of molybdenum content in steel, iron and alloy - Thiocyanate spectrophotometric method 
GB/T223.28 Methods for chemical analysis of steel, iron and alloy - α-benzoin oxime gravimetric method for determination of molybdenum content 
GB/T223.36 Methods for chemical analysis of steel, iron and alloy - Distillation separation-neutralization titration method for determination of nitrogen content 
GB/T223.37 Methods for chemical analysis of steel, iron and alloy - Distillation separation-indophenol blue photometric method for determination of nitrogen content 
GB/T223.40 Determination of niobium content in steel, iron and alloy - Chlorosulfonol S spectrophotometric method 
GB/T223.58 Methods for chemical analysis of steel, iron and alloy - Sodium arsenite-sodium nitrite titration method for determination of manganese content 
GB/T223.59 Chemical analysis methods for steel, iron and alloys-Antimony phosphomolybdate blue photometric method for the determination of phosphorus content 
GB/T223.60 Chemical analysis methods for steel, iron and alloys-Perchloric acid dehydration gravimetric method for the determination of silicon content 
GB/T223.61 Chemical analysis methods  for steel
, iron and alloys-Ammonium phosphomolybdate volumetric method for the determination of phosphorus content GB/T223.62 Chemical analysis methods for steel, 
iron and alloys-Butyl acetate extraction photometric method for the determination of phosphorus content GB/T223.63 Chemical analysis methods for steel, iron and alloys-Sodium (potassium) periodate photometric method for the determination 
of manganese content GB/T223.67 Determination of sulfur content in steel and alloys-Methylene blue spectrophotometric method 
GB/T223.68 Chemical analysis methods for steel, iron and alloys-Determination of sulfur content by potassium iodate titration after combustion in a tubular furnace 
GB/T223.69 Determination of carbon content in steel and alloys-Gas volumetric method after combustion in a tubular furnace 
GB/T223.71 Chemical analysis methods for steel and alloys - Gravimetric method for determination of carbon content after combustion in a tubular furnace 
GB/T223.72 Determination of sulfur content in steel and alloys - Gravimetric method 
GB/T228 Tensile test methods for metallic materials at room temperature (GB/T228-2002, eqvISO6892:1998) 
GB/T342-1997 Dimensions, shapes, weights and tolerances of cold-drawn round steel wire, square steel wire and hexagonal steel wire 
GB/T2103-2008 General provisions for acceptance, packaging, marking and quality certification of steel wire 
GB/T3207-2008 Silver-bright steel 
GB/T4334 Corrosion of metals and alloys Test method for intergranular corrosion of stainless 
steel GB/T4356 Stainless steel wire rod 
GB/T11170 Photoelectric emission spectroscopic analysis method for stainless steel 
GB/T20066 Sampling and preparation of samples for determination of chemical composition of steel and iron (GB/T20066-2006, ISO14284:1996, IDT) 
GB/T20123 Determination of total carbon and sulfur content of steel by infrared absorption method after combustion in a high-frequency induction furnace (conventional method) (GB/T20123-2006, ISO15350:2000, IDT) 
GB/T20124 Determination of nitrogen content of steel by inert gas fusion thermal conductivity method (conventional method) (GB/T20124-2006, ISO15351:1999, IDT)