GB/T 38884-2020High temperature stainless steels for bearing (English PDF)

1 Scope

This standard specifies the classification and code, order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, markings and quality certificates of high temperature stainless steels for bearing.

This standard applies to hot-rolled or forged round steel, cold-drawn round steel and steel wire (hereinafter referred to as steel) for the manufacture of stainless steel bearings that can withstand high temperatures of 300 °C ~ 400 °C.

2 Normative references

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) are applicable to this standard.

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 223.23 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 223.53 Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrophotometric method for the determination of copper content

GB/T 223.62 Methods for chemical analysis of iron, steel and alloy - The tower sample

GB/T 10561-2005 Steel - Determination of content of nonmetallic inclusions - Micrographic method using standards diagrams

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

GB/T 13298 Inspection methods of microstructure for metals

GB/T 14979-1994 Eutectic carbide of steel - Micrographic method using Standard diagrams

GB/T 15711 Inspection of non-metallic inclusions of steel - Etching test method of tower samples

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 32548 Determination of iron, tin, antimony, cerium, lead and bismuth - Inductively coupled plasma - mass spectrometric method

GB/T 36026-2018 High-strength corrosion-resistant alloy bars for oil and gas engineering

YB/T 4395 Steel - Determination of molybdenum, niobium and tungsten contents - Inductively coupled plasma atomic emission spectrometric method

YB/T 4396 Stainless steel - Determination of multi-element contents - Inductively coupled plasma atomic emission spectrometric method

3 Classification and code

3.1 Steels are divided into the following two categories according to the processing methods used:

a) Steel for pressure processing UP;

b) Steel for cutting UC.

3.2 Steels are divided into the following two categories according to their end use: […]

6 Technical requirements

6.12.2 The total decarburization depth on each side of the cold-drawn round steel and steel wire surface shall not be greater than 1.5% of the nominal diameter.

6.12.3 There shall be no decarburized layer on the surface of the stripped and polished steel.