Cold work mould steel, similar to ASTM A2,it is a kind of widely
used steel in A. Good wear resistance, minimal distortion, good
quench-hardening ability, high pressure strength.
Air hardening tool steel which is easier to machine than D2 or D3
but offers high abrasion resistance with good toughness. steel for
pressing mold and cutting knife with heavy-loading and complex
Chemical Composition (%):
Hardness: annealing,less than or equal to 255 HB，creasingdiameter
is more than or equal to 3.95 mm ; quenching is more than or equal
to 60 HRC.