GB/T 1174-2022 PDF in English
GB/T 1174-2022 (GB/T1174-2022, GBT 1174-2022, GBT1174-2022)
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Cast bearing alloy
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| GB/T 1174-1992 | English | 420 |
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Cast bearing metals
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Standards related to (historical): GB/T 1174-2022
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GB/T 1174-2022: PDF in English (GBT 1174-2022) GB/T 1174-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.99
CCS J 31
Replacing GB/T 1174-1992
Cast bearing alloy
ISSUED ON: OCTOBER 12, 2022
IMPLEMENTED ON: OCTOBER 12, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 8
4 Alloy designations and codes ... 8
5 Technical requirements ... 9
6 Test methods ... 16
7 Inspection rules ... 17
8 Marking, packaging, transportation, storage and quality certificate ... 18
Appendix A (Normative) Test pieces for hardness inspection of tin-based, lead-based
bearing alloys ... 19
Cast bearing alloy
1 Scope
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
GB/T 5121.10, Methods for chemical analysis of copper and copper alloys - Part 10:
Determination of tin content
GB/T 5121.11, Methods for chemical analysis of copper and copper alloys - Part 11:
Determination of zinc content
GB/T 5121.12, Methods for chemical analysis of copper and copper alloys - Part 12:
Determination of antimony content
GB/T 5121.13, Methods for chemical analysis of copper and copper alloys - Part 13:
Determination of aluminium content
GB/T 5121.23, Methods for chemical analysis of copper and copper alloys - Part 23:
Determination of silicon content
GB/T 5611, Foundry terminology
GB/T 8063, Designation of cast nonferrous metals and their alloys
GB/T 8888, Wrought heavy non-ferrous metal products - packing, marking,
transportation, storing and certificate of quality
GB/T 12689.1, Methods for chemical analysis of zinc and zinc alloys - Part 1:
Determination of aluminum content – Chrome azurol S-polyethylene glycol octyl
phenyl ether-ethyl pyridine bromine spectrophotometry, Chrome azurol S
spectrophotometric method and EDTA titrimetry
GB/T 12689.3, The methods for chemical analysis of zinc and zinc alloys - The
determination of cadmium content - The flame atomic absorption spectrometric
method
GB/T 12689.4, The methods for chemical analysis of zinc and zinc alloys - The
determination of copper content - The lead diethyldithio-carbamate
spectrophotometric method and the flame atomic absorption spectrometric method
and the electrolytic method
GB/T 12689.5, The methods for chemical analysis of zinc and zinc alloys - The
determination of iron content - The sulfosalicylic acid spectrometric method and the
flame atomic absorption spectrometric method
YS/T 475.1, Methods for chemical analysis of cast bearing metals - Determination
of tin content - Potassium iodate titrimetric method
YS/T 475.2, Methods for chemical analysis of cast bearing metals - Determination
of lead content - EDTA titrimetric method
YS/T 475.3, Methods for chemical analysis of cast bearing metals - Determination
of antimony content - Cerium sulfate titrimetric method
YS/T 475.4, Methods for chemical analysis of cast bearing metals - Determination
of copper content - Hyposulphite titrimetric method
YS/T 475.5, Methods for chemical analysis of cast bearing metals - Determination
of arsenic content - Molybdoantimonyarsenate blue spectrophotometric method
YS/T 475.6, Methods for chemical analysis of cast bearing metals - Determination
of aluminium content – Chrome azurol S spectrophotometric method
YS/T 475.7, Methods for chemical analysis of cast bearing metals - Determination
of lead, copper, iron, bismuth, zinc, cadmium, content - AAS method
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.
6.1.3 Composition analysis of zinc-based bearing alloy
6.1.3.1 The composition analysis of zinc-based bearing alloy shall be carried out in
accordance with the provisions of GB/T 12689.1 and GB/T 12689.3~12689.10. Where
analytical precision is guaranteed, other detection methods are allowed.
6.1.3.2 When the analysis results are in dispute, arbitration shall be carried out
according to GB/T 12689.1 and GB/T 12689.3~12689.10.
6.1.4 Composition analysis of aluminum-based bearing alloy
6.1.4.1 The composition analysis of aluminum-based bearing alloy shall be carried out
in accordance with the provisions of GB/T 20975.3~20975.5, GB/T 20975.7, GB/T
20975.8, GB/T 20975.10, GB/T 20975.12, GB/T 20975.14 and GB/T 20975.16. Where
analytical precision is guaranteed, other detection methods are allowed.
6.1.4.2 When the analysis results are in dispute, arbitration shall be carried out
according to GB/T 20975.3~20975.5, GB/T 20975.7, GB/T 20975.8, GB/T 20975.10,
GB/T 20975.12, GB/T 20975.14 and GB/T 20975.16.
6.2.1 Mechanical properties
6.2.1 The tensile test shall be carried out in accordance with the provisions of GB/T
228.1.
6.2.2 The hardness test shall be carried out in accordance with the provisions of GB/T
231.1.
6.2.3 The compression test shall be carried out in accordance with the provisions of
GB/T 16748.
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.
7.2 Sampling method
7.2.1 The test piece can be taken from the casting body or from a single-cast test piece
cast at the same time. The casting-mold conditions of the single-cast test pieces shall
be the same as those of the product castings, and the heat treatment of the test pieces
shall be carried out in the same heat treatment process as that of the same batch of
castings.
7.2.2 Mechanical property and chemical composition inspection shall be carried out in
batches, and one sample in each batch shall be inspected.
7.2.3 For the chemical composition inspection, only the main elements are required for
analysis, and the content of other elements can be randomly checked according to the
requirements of the purchaser.
7.3 Judgment and re-inspection
7.3.1 Where the chemical composition fails the first test, it is allowed to inspect two
more test pieces; if the analysis results meet the requirements, judge the batch of alloy
to be qualified, otherwise, judge it as unqualified.
7.3.2 During the mechanical property inspection, inspect one sample for the first time.
If the inspection result meets the standard requirements, judge this batch of alloy to
qualified; if not, it is allowed to inspect two more test pieces for the corresponding items.
If the analysis results meet the requirements, judge the batch of alloy as qualified,
otherwise, judge it as unqualified.
7.3.3 Where the sample has casting defects, or the inspection result is unqualified due
to the failure of the test itself, it is an invalid test and will not be counted in the number
of inspections. Replace the test pieces for a re-inspection.
7.3.4 When the hardness of the test piece is unqualified, it is allowed to take castings
of the same batch for retesting, where the number of castings to be sampled shall not
be less than five. If there are less than five castings in the same batch, inspect all of
them. Where the hardness of any casting is unqualified in the re-inspection of the
selected castings, the batch of castings shall be inspected one by one.
8 Marking, packaging, transportation, storage and quality
certificate
The marking, packaging, transportation, storage and quality certificate of the product
shall comply with the provisions of GB/T 8888.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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