GB/T 1174-2022Cast bearing alloy (English PDF)

1 Scope

GB/T 1174-2022 is the Chinese national standard on cast bearing alloy, in the field of metallurgy. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 12 October 2022 by the State Administration for Market Regulation; Standardization Administration of China, and has been in force since 12 October 2022. Classification: ICS 77.150.99, CCS J31. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This document specifies the cast bearing alloy designations and codes, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and quality certificates. This document applies to cast tin-based, lead-based, copper-based and aluminum-based bimetallic plain bearings, as well as copper-based, zinc-based and aluminum-based alloy integral plain bearings.

2 Normative references

The following documents are normatively referenced in this document and are indispensable for its application. For dated references, only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document.

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

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

GB/T 1173, Casting aluminium alloy

GB/T 1175, Casting zinc alloys

GB/T 1176, Casting copper and copper alloys

GB/T 5121.1, Methods for chemical analysis of copper and copper alloys - Part 1: Determination of copper content

GB/T 5121.2, Methods for chemical analysis of copper and copper alloys - Part 2: Determination of phosphorus content

GB/T 5121.3, Methods for chemical analysis of copper and copper alloys - Part 3: Determination of lead content

GB/T 5121.4, Methods for chemical analysis of copper and copper alloys - Part 4: Determination of carbon and sulfur content

GB/T 5121.5, Methods for chemical analysis of copper and copper alloys - Part 5: Determination of nickel content

GB/T 5121.6, Methods for chemical analysis of copper and copper alloys - Part 6: Determination of bismuth content

GB/T 5121.7, Methods for chemical analysis of copper and copper alloys - Part 7: Determination of arsenic content

GB/T 5121.9, Methods for chemical analysis of copper and copper alloys - Part 9: Determination of iron content

3 Terms and definitions

Terms and definitions determined by GB/T 5611 are applicable to this document.

4 Alloy designations and codes

4.1 Representation of alloy designations The cast bearing alloy designations shall be represented in accordance with the provisions of GB/T 8063.

4.2 Alloy casting method codes S - sand casting; J - permanent mold casting; Li - centrifugal casting.

4.3 Alloy heat treatment state codes T5 - solution treatment plus incomplete artificial aging.

6.1.2.2 When the analysis results are in dispute, arbitration shall be carried out according to GB/T 5121.1~5121.7, GB/T 5121.9~5121.13 and GB/T 5121.23.

6 Test methods...

7 Inspection rules

7.1 Batch Bearing alloys are generally batched according to the smelting furnace. In the case of stable production (stable personnel, raw materials, smelting process, test methods, inspection and other procedures), the same alloy smelted in one work shift and in different furnaces can also be regarded as one batch.

8 Marking, packaging, transportation, storage and quality

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Notes and Explanations

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