JB/T 9749.1-2015Internal combustion engines - Bearing shells - Part 1: Cast copper-lead alloy bearing shells - Metallographic examination (English PDF)
内燃机 轴瓦 第1部分：铸造铜铅合金轴瓦 金相检验
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Issued by
MIIT
Level / Type
Industry · Recommended
Issue date
April 30, 2015
Implementation date
October 1, 2015
Scope
JB/T 9749.1-2015 is the English-translated version of 内燃机 轴瓦 第1部分：铸造铜铅合金轴瓦 金相检验.
JB/T 9749.1-2015 deals with the metallographic examination of cast copper-lead alloy bearing shells for internal combustion engines, and it is a recommended Chinese machinery industry standard.
Part 1 lays down the technical requirements, the test methods and the grading applied when the microstructure of such bearing shells is assessed. It is written for the examination of cast copper-lead alloy shells whose lead content runs from 20 percent to 33 percent.
It quotes GB/T 1151. It replaces JB/T 9749-1999. The work is filed under the Chinese classification J92, and the Ministry of Industry and Information Technology is the issuing body.
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Document preview — JB/T 9749.1-2015
National Standard of the People's Republic of China
- Replacing
- JB/T 9749-1999
Issued by: Ministry of Industry and Information Technology of the People's Republic of China
Contents
- Foreword
- Scope
- Normative references
- About this standard
- Related standards
- Classification and status
1 Foreword
JB/T 9749.1-2015 was issued by MIIT on 30 April 2015 and has been in force since 1 October 2015.
It is one of 3 parts of the JB/T 9749 series.
2 Scope
JB/T 9749.1-2015 deals with the metallographic examination of cast copper-lead alloy bearing shells for internal combustion engines, and it is a recommended Chinese machinery industry standard. Part 1 lays down the technical requirements, the test methods and the grading applied when the microstructure of such bearing shells is assessed. It is written for the examination of cast copper-lead alloy shells whose lead content runs from 20 percent to 33 percent. It quotes GB/T 1151. It replaces JB/T 9749-1999. The work is filed under the Chinese classification J92, and the Ministry of Industry and Information Technology is the issuing body.
3 Normative references
JB/T 9749.1-2015 cites the following standards, which apply in full or in part through the references made to them in its clauses.
GB/T 1151
4 About this standard
Issued by: MIIT
English translation: about 15 pages
5 Related standards
Other parts of this standard:
JB/T 9749-1999 — Cast copper-lead alloy bearing shells - Metallographic examination
JB/T 9749.2-2008 — Part 2: Inspection specification for bearing shells with precision electroplated overlay
6 Classification and status
Prefix JB/T: recommended standard.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of JB/T 9749.1
| Edition | Title | Revision | Status |
|---|---|---|---|
| JB/T 9749.1-2015 | Internal combustion engines - Bearing shells - Part 1: Cast copper-lead alloy bearing shells - Metallographic examination | current edition | Current |
| JB/T 9749-1999 | Internal combustion engines - Bearing shells - Part 1: Cast copper-lead alloy bearing shells - Metallographic examination | previous edition | Superseded |
This page sells the current edition, JB/T 9749.1-2015. Earlier editions are listed for reference only.
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Related Standards
GB/T 1151-2023 — Internal combustion engines - Main and connecting rod bearings - Specifications
JB/T 9749.2-2008 — Internal combustion engines - Bearing shells - Part 2: Inspection specification for bearing shells with precision electroplated overlay
JB/T 10062-2026 — Probes used in ultrasonic flaw detection - Testing methods for performance
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JB/T 9749.1-2015
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