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GB/T 45329-2025Precious metals and their alloys wrought for ignition electrodes (English PDF)

点火电极用贵金属及其合金加工材

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

February 28, 2025

Implementation date

September 1, 2025

Scope

GB/T 45329-2025 is the English-translated version of 点火电极用贵金属及其合金加工材.

GB/T 45329-2025 is the Chinese standard for the wrought precious metals and alloys used in ignition electrodes: the platinum, iridium, rhodium, ruthenium and their alloys that form the tip of a spark plug in an engine or of an igniter in a gas turbine or a burner.

The reason a precious metal is there at all is erosion: the electrode is destroyed a little by every spark, and the service life of the plug is the life of that tip.

The standard specifies the grades and their designation, the chemical composition, the dimensions and tolerances of the wire, rod and strip supplied, the mechanical properties, the surface quality, the test methods, the inspection rules and the marking, packaging, transport and quality certificate.

For a spark plug maker, a precious metal fabricator or a buyer verifying a delivery in China, this is the text the material is bought and accepted against.

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Document preview — GB/T 45329-2025

National Standard of the People's Republic of China

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Product classification and labeling
5 Technical requirements
6 Test methods
7 Inspection rules
8 Marking, packaging, transportation, storage and accompanying documents
9 Order information
Annex A (Normative) Determination of ignition electrical ablation
Annex B (Normative) High temperature oxidation volatilization mass loss rate

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part

1.Structure and drafting rules for standardization documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by China Nonferrous Metals Industry Association. This document is under the jurisdiction of the National Technical Committee on Standardization of Nonferrous Metals (SAC/TC243). This document was drafted by: Kunming Fuernolin Technology Development Co., Ltd., Weichai Torch Technology Co., Ltd., Kunming University of Science and Technology, Kunming Guiyan New Materials Technology Co., Ltd., Tongji University, AECC Beijing Institute of Aeronautical Materials, Yunnan Academy of Science and Technology, Beijing Nonferrous Metals Institute of Metal and Rare Earth Application Co., Ltd., Shenzhen Mindray Bio-Medical Electronics Co., Ltd. The main drafters of this document are. Li Yang, Hu Guoyi, Yang Xikun, Zhou Chuan, Deng Jun, Yang Huimu, Chen Guangyun, Wang Feng, Luo Fei, Ji Jianan, Zhou Ying, Wu Haijun, Zhou Fang, Li Liguang, Deng Nanfang, Miao Yixin, Xu Hong, Zuo Pengfei. Precious metals and their alloy processed materials for ignition electrodes

7 Inspection rules

8 Marking, packaging, transportation, storage and accompanying documents

9 Order information

Annex A (Normative) Determination of ignition electrical ablation

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 30 pages — is available in the English PDF.

Referenced standards

Normative references

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