T1 High Speed Steel AISI T1 Tool Steel is an important Tungsten-type high speed steel according to ASTM/A600 standard. This material has high hardness and red hardness which can remain 57 HRC when the temperature is 500°C.
1.3355 / HS18-0-1 DIN 1.3355 / HS18-0-1 Steel is a common Tungsten-type high speed steel. HS18-0-1 steel has high hardness and red hardness. The 1.3355 steel can remain 57 HRC when the temperature is 500°C.