GB/T 3203-2016Carburizing steels for bearings (English PDF)

1 Scope

This Standard specifies the classifications and codes, order contents, size, shape, technical requirements, test methods, inspection rules, packaging, marks and quality certificate of carburizing steels for bearing.

This Standard is applicable to hot-rolled, forged, cold-drawn carburizing steels for bearing and bright round steel (hereinafter referred to as steel) for production of bearing rings and rolling body use.

Agreed by the supplier and the purchaser, the steels of other designations and sizes shall be supplied. The requirements shall be specified in the contract.

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 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 223.9, Iron steel and alloy - Determination of aluminium content -

Chrom azurol S photometric method

GB/T 223.11, Iron, Steel and Alloy - Determination of Chromium Content -

Visual Titration or Potentiometric Titration Method

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, 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 223.59, Iron, Steel and Alloy - Determination of Phosphorus Content

- Bismuth Phosphomolybdate Blue Spectrophotometric Method and

Antimony Phosphomolybdate Blue Spectrophotometric Method

GB/T 223.60, Methods for chemical analysis of iron steel and alloy - The perchloric acid dehydration gravimetric method for the determination of silicon content

GB/T 223.63, Methods for chemical analysis of iron, steel and alloy--The sodium (potassium) periodate photometric 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, Iron, Steel and Alloy-Determination of Carbon Contents-

Gas-volumetric Method after Combustion in the Pipe Furnace

GB/T 223.77, Methods for chemical analysis of iron, steel and alloy - The flame atomic absorption spectrometric method for the determination of calcium content

GB/T 223.82, Steel and iron - Determination of hydrogen content - Inert gas impulse fusion heat conductivity method

GB/T 223.84, Steel and iron - Determination of titanium content -

Diantipyrylmethane spectrophotometric method

GB/T 224-2008, Determination of depth of decarburization of steels

GB/T 225, Steel-hardenability test by end quenching (Jominy test)

GB/T 226, Etch test for macrostructure and defect of steels

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

GB/T 229, Metallic Materials - Charpy Pendulum Impact Test Method

GB/T 231.1, Metallic materials - Brinell hardness test - Part 1. Test method

GB/T 702-2008, Hot-rolled Steel Bars - Dimensions, Shape, Weight and

Tolerances

GB/T 905-1994, Dimension, shape, weight and tolerance for cold-drawn round, square and hexagonal steels

GB/T 908-2008, Forged Bars - Dimensions, Shape, Weight and Tolerances

GB/T 1979, Standard diagrams for macrostructure and defect of structural steels

GB/T 2101, General provisions on acceptance, package, marking and quality certificate for profile steel

GB/T 2975, Steel and Steel Products - Location and Preparation of Test

Pieces for Mechanical Testing

GB/T 3207-2008, Bright steel

GB/T 4162, Forged and Rolled Steel Bars - Method for Ultrasonic Testing

GB/T 4336, Carbon and low-alloy steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (routine method)

GB/T 6394-2002, Metal - Methods for estimating the average grain size

GB/T 10561-2005, Steel - Determination of Content of Nonmetallic

Inclusions - Micrographic Method Using Standards Diagrams

GB/T 11261, Steel and Iron-Determination of oxygen content - The pulse heating inert gas fusion-infra-red absorption method

GB/T 15711, Steel Products - Method for Etch Test of Tower Sample

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 20125, Low-alloy steel - Determination of multi-element contents -

Inductively coupled plasma atomic emission spectrometric method

YB/T 4307, Iron, Steel and Alloy - Determination of Oxygen, Nitrogen and

Hydrogen Contents - TOF-mass Spectroscopy Method after Fusion in a

Current of Inert Gas

3 Classifications and codes