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Database: 189760 (25 Oct 2025)
TB/T 3212.1-2009 English PDF
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TB/T 3212.1-2009
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Metallographic atlas for metallographic microstructure examination of low alloy cast steel for rolling stock. Part 1: Grades B and B+ cast steel
Obsolete
TB/T 3212.1-2009
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Basic data
Standard ID
TB/T 3212.1-2009 (TB/T3212.1-2009)
Description (Translated English)
Metallographic atlas for metallographic microstructure examination of low alloy cast steel for rolling stock. Part 1: Grades B and B+ cast steel
Sector / Industry
Railway & Train Industry Standard (Recommended)
Classification of Chinese Standard
S30
Classification of International Standard
45.060.01
Word Count Estimation
13,137
Date of Issue
2009-11-11
Date of Implementation
2010-05-01
Older Standard (superseded by this standard)
TB/T 3012-2006
Regulation (derived from)
Industry standard filing Notice 2010 No. 8 (No. 128 overall)
Issuing agency(ies)
Ministry of Railways of the People's Republic of China
Summary
This standard specifies the B grade steel (ZG25MnNi), B + grade steel (ZG25MnCrNi) metallographic examination of the technical requirements, test methods, inspection rules, microstructure and ratings chart. This standard applies after normalizing heat treatment or normalizing heat treatment of B grade steel (ZG25MnNi), B + grade steel (ZG25MnCrNi) metallographic examination.