in particular, tool steel, tool steel with high carbon content

摘要

1364235 Tool steels APV PARAMOUNT Ltd 9 Sept 1971 [16 June 1970] 29262/70 Heading C7A [Also in Division B3] A tool steel having the composition 0À4-2À5% C, 0-2À0% Si, 0-4À0% Mn, 0-25% W, 0-15% Mo, 0-10% V, 0-15% Co, 0-15% Cr, balance Fe and impurities, is centrifugally cast. The preferred steels are those having the percentage compositions the balance in each case being iron and impurities.