S1

S1

S1 is an oil hardening shock resisting cold work die steel.  This grade has largely been replaced by more modern materials but is still utilized in specific applications.  It can be sourced in Plate, Block, and Round Bar forms.  The optimal hardness range is 49-56 HRC.

For more detailed information download the tech bulletin PDF below:
AISI S-1 Oil Hardening Shock Steel