S5

S5

S5 is an oil hardening shock resistant cold work die steel.  Similar to S1 die steel, S5 has been largely replaced by more modern materials.  This material has good wear resistance and good shock resistance.  It can be sourced in Plate, Block, and Round Bar forms.  The optimal hardness range is 56-62 HRC.

For more detailed information download the following tech bulletin PDF:
LSI-S5