This standard specifies the dimensions, shape, technical requirements, test methods, inspection rules, packaging, marks and quality certificates of high-speed tool steel plates. This standard applies to cold-rolled steel sheets with a thickness not greater than 4mm and hot-rolled steel sheets with a thickness not greater than 10mm.
GB/T 9941-1988 history
2009GB/T 9941-2009 High speed tool steel sheets and plates
1988GB/T 9941-1988 High speed tool steel sheets and plates--Technical requirements