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JB/T 6141.4-2025Heavy-duty gear - Part 4: Metallographic determination of carbon content on carburized surface (English PDF)

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Issued by

Ministry of Industry and Information Technology

Level / Type

National · Recommended

Issue date

July 2, 2025

Implementation date

February 1, 2026

Scope

JB/T 6141.4-2025 (Heavy-duty gear - Part 4: Metallographic determination of carbon content on carburized surface) is available as an English-translated PDF.

JB/T 6141.4-2025 — This standard specifies the material, heat treatment requirements, and testing locations for carburized parts of heavy-duty gears, and describes the carbon content detection and evaluation methods.

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Document preview — JB/T 6141.4-2025

National Standard of the People's Republic of China

ICS: 21.200
Classification: J 17
Replacing: JB/T 6141.4-1992

Issued by: Ministry of Industry and Information Technology

What this standard covers1
Document data2

What this standard covers

This standard specifies the material, heat treatment requirements, and testing locations for carburized parts of heavy-duty gears, and describes the carbon content detection and evaluation methods. This standard applies to the metallographic determination of the carbon content on the carburized surface of low-carbon alloy steel heavy-duty gear parts; the determination of the carbon content on the carburized surface of other steel grades is subject to the same method.

Document data

International classification (ICS): 21.200.

Chinese classification (CCS): J17.

Estimated length of the Chinese original: 12,150 words.

Supersedes the earlier edition JB/T 6141.4-1992.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 8 pages — is available in the English PDF.

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