Standard No.:	DL/T 674-1999
English Name:	The gradational standard of spherular pearlite for carbon steel No.20 used in fossil power plant
Chinese Name:	火电厂用20号钢珠光体球化评级标准
Chinese Classification:	H26    Metal nondestructive testing method
Professional Classification:	DL    Professional Standard - Electricity
Issued by:	NDRC
Issued on:	1999-8-2
Implemented on:	1999-10-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	10000 words
Price(USD):	300.00
Delivery:	via email in 1~3 business day

本标准规定了火电厂用20号钢珠光体球化的评级方法。
本标准适用于按GB3087、GB5310标准供货的20号钢火电厂管道、管件在高温下长期使用后的珠光体球化等级评定，也适用于用20号钢钢板、条钢、型钢制造的构件在高温下长期使用后的珠光体球化等级评定。
其他与20号钢相类似的材料亦可参照执行。