美国易切削硬质合金钢：C-1C-2C-3C-4C-5C-50C-6C-60C-60AC-7C-7AC-8C-8A13-8Moph14-8MoPH15-7Mo15-5PH17-4PHAM-350美国结构钢的:1005100610081010101110121013101510161017101810191020美国合金钢部分如:A242A440A441A529A572A588A606A607A618A633A656A690A709A715A808A812A841A871)