Standard No.:	JB/T 6979-1993
English Name:	Large and Middle Steel Forged Modules Quality Grading (Supersonic Wave and Impurities)
Chinese Name:	大中型钢质锻制模块（超声波和夹杂物） 质量分级
Chinese Classification:	J32    Forging and pressing
Professional Classification:	JB    Professional Standard - Machinery
Issued by:	Beijing Mechanical and Electrical Research Institute
Issued on:	1993-7-27
Implemented on:	1994-7-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	4000 words
Price(USD):	120.00
Delivery:	via email in 1~3 business day

本标准规定了钢质锻模块按不同受力状况的分类规则及各类模块在不同使用范围的质量分级指标。 本标准由适用于锤锻、对击锤锻、平锻、机械压力机锻、辊锻、液压机锻钢质模块，本标准也适用于有色金属压铸和塑料成型等工艺用钢质模块。