AISI: H21 

 Typical Analysis :  C 0.30 ;  W 9.0 ; Cr 2.7 ; V 0.4%

  Properties : Good resistance to hot wearand heat checking. Suitable for both oil and air hardening.

  Applications :   Primarily used for processing heavy as well as light metal alloys .  Tools for metal tube and rod extrusion presses, dies, mandrels and containers for   oil cooling, rams for vertical presses, ram heads.  Tools for manufacturing screws , nuts , bolts , and rivets. Die casting tools for all materials with high melting point     & hot pressing