Standard No.:	YB/T 153-1999
English Name:	Standard diagrams for macrostructure and defect in quality carbon structural steel and alloy structural steel continuous casting blank
Chinese Name:	优质碳素结构钢和合金结构钢连铸方坯低倍组织缺陷评级图
Chinese Classification:	H24    Metallographic testing method
Professional Classification:	YB    Professional Standard - Metallurgy
Issued by:	China Administration of Metallurgical Industry
Issued on:	1999-08-19
Implemented on:	2000-1-1
Status:	superseded
Superseded by:	YB/T 153-2015 Standard diagrams for macrostructure and defects in high quality structural steel continuous casting blank
Superseded on:	2015-10-1
Language:	English
File Format:	PDF
Word Count:	14000 words
Price(USD):	420.00
Delivery:	via email in 1~5 business day

本标准规定了优质碳素结构钢合合金结构钢连铸方（矩形）坯及圆坯（以下简称连铸坯）的低倍组织缺陷形貌特征、产生原因和评级原则。
本标准适用于评定优质碳素结构钢、合金结构钢、弹簧钢等连铸坯的横截面酸蚀低倍组织缺陷。连铸坯尺寸范围为：100～300mm的方或矩形坯，90～350mm圆坯。其他尺寸的连铸坯可参照使用。