Carbon Tool Steel usually in the form of forged bar stock. Steel Grades for tool steel can be any of the following (depending on the application) T10/1.1645 SK3/SK4/W1A-91/2/ TC105/y10/1880/BW1B T10A/1.1545/y10A/1880 Standards are published by: DIN, JIS, ASTM, AISI, BS, SS, ISO, TOCT, GB Doug
