GB/T 24588-2019Stainless steel spring wires (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard replaces GB/T 24588-2009 "Stainless steel wires for spring". Compared with GB/T 24588-2009, main technical changes are as follows:

- tightened requirements for allowable diameter deviation of steel wires (see 6.2 of this Edition, 6.2 of Edition 2009);

- added 4 designations: 07Cr19Ni10, 06Cr18Ni11Ti, 12Cr18Mn12Ni2N and 04Cr12Ni8Cu2TiNb as well as relevant requirements (see Table 1, Table 4, Table 5, Table 6 and Table 7 of this Edition, Table 1, Table 4 and Table 5 of Edition 2009);

- modified representation modes for some designations: modified 06Cr19Ni9 to 06Cr19Ni10, 06Cr19Ni9N to 06Cr19Ni10N, 12Cr17Mn8Ni3Cu3N to 12Cr16Mn8Ni3Cu3N (see Table 1, Table 4, Table 5 of this Edition, Table 1, Table 4, Table 5 of Edition 2009);

- tightened nitrogen content of 12Cr18Mn9Ni5N and 12Cr16Mn8Ni3Cu3N, from 0.05%~0.30% to 0.05%~0.25% (see Table 4 of this Edition, Table 4 of Edition 2009);

- expanded size range of steel wire twist test; modified nominal diameter from 0.50mm~4.00mm to 0.50mm~6.00mm (see 7.5.1 of this Edition, 7.5.1 of Edition 2009);

- modified requirements for surface state of steel wires (see 7.2.2 of this Edition, 7.2.2 of Edition 2009);

- added technical requirements and methods for intergranular corrosion test of austenitic stainless steel (see 7.7 and Table 8 of this Edition);

- added comparison between different editions of designations of this Standard (see Annex A of this Edition).

1 Scope

This Standard specifies terms and definitions, order content, designations and groups, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marks and quality certificate for stainless steel spring wires.

This Standard is applicable to Austenitic and precipitation-hardening stainless-steel spring wires that are used to make springs (hereinafter referred to as steel wires).

2 Normative references

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

GB/T 222, Method of sampling steel for determination of chemical composition and permissible variations for product analysis

GB/T 223.4, Alloyed steel - Determination of manganese content - Potentiometric or visual titration method

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 223.8, Methods for chemical analysis of iron, steel and alloy - The sodium fluoride separation - EDTA titration method for the determination of aluminum content

GB/T 223.11, Iron, Steel and Alloy - Determination of Chromium Content - Visual Titration or Potentiometric Titration Method

GB/T 223.17, Methods for chemical analysis of iron, steel and alloy - The diantipyrylmethane photometric method for the determination of titanium content

GB/T 223.18, Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium Thiosulfate Separation Iodimetric 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 223.25, Methods for chemical analysis of iron, steel and alloy - The dimethylglyoxime gravimetric method for the determination of nickel content

GB/T 223.26, Iron, Steel and Alloy - Determination of Molybdenum Content - The Thiocyanate Spectrophotometric Method

GB/T 223.28, Methods for chemical analysis of iron, steel and alloy - The alpha-benzoinoxime gravimetric method for the determination of molybdenum content

GB/T 223.36, Methods for chemical analysis of iron, steel and alloy - The neutral titration method for the determination of nitrogen content after distillation separation

GB/T 223.40, Iron, Steel and Alloy - Determination of Niobium Content by the Sulphochlorophenol S Spectrophotometric Method

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 223.64, Iron, Steel and Alloy - Determination of Manganese Content - Flame Atomic Absorption Spectrometric Method

GB/T 223.85, Steel and iron - Determination of sulfur content - Infrared absorption method after combustion in an induction furnace

GB/T 223.86, Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace

GB/T 228.1, Metallic materials - Tensile testing - Part 1: Method of test at room temperature

GB/T 238, Metallic materials - Wire - Reverse bend test

GB/T 239.1, Metallic materials - Wire - Part 1: Simple torsion test

GB/T 342-2017, Dimension, shape, mass and tolerance of cold-drawn round square and hexagonal steel wires

GB/T 2103-2008, General requirements for acceptance, packing, marking and quality certification of steel wire

GB/T 2976, Metallic materials - Wire - Wrapping test

GB/T 4240, Stainless steel wires

GB/T 4334-2008, Corrosion of metals and alloys - Test methods for intergranular corrosion of stainless steels

GB/T 4356, Stainless steel wire rods

GB/T 11170, Stainless steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (Routine method)

GB/T 20066, Steel and Iron-Sampling and Preparation of Samples for the Determination of Chemical Composition

GB/T 20123, Steel and iron - Determination of total carbon and sulfur content Infrared absorption method after combustion in an induction furnace (routine method)

GB/T 20124, Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas

GB/T 20878, Stainless and heat-resisting steels - Designation and chemical composition

3 Terms and definitions

For the purposes of this document, the terms and definitions defined in GB/T 4240, GB/T 20878 as well as the followings apply.

4 Order content

Order contract or order sheet according to this Standard shall include the following information: […]

7 Technical requirements

8 Test methods

Test items and test methods of steel wires shall comply with provisions of Table 8.

9 Inspection rules