Standard No.:	JB/T 2122-1977
English Name:	Metallographic Specifications for Malleable Ferritic Cast Iron
Chinese Name:	铁素体可锻铸铁 金相
Chinese Classification:	J31    Casting
Professional Classification:	JB    Professional Standard - Machinery
Issued by:	First Machinery Industry Ministry
Issued on:	1977-10-1
Implemented on:	1977-10-1
Status:	abolished
Abolished on:	2017-05-12
Language:	English
File Format:	PDF
Word Count:	6000 words
Price(USD):	180.00
Delivery:	via email in 1~3 business day

本标准为铁素体可锻铸铁金相组织分级标准。本标准主要用于指导生产，改进工艺，提高质量。当试棒由于铸造缺陷或其它原因不能按GB 978—67《可锻铸铁件分类及技术条件》作为考核质量的依据时，经生产和使用部门协商同意后，允许按选定的金相组织作为验收条件。