AISI H-21

Description


H21 Steel is a hot work tool steel for oil or air solidifying to grow high hot quality, maintenance of hardness, and warmth checking resistance. This is mostly utilized as hot work devices, instruments for manufacture of hollows, screws, rivets, nuts and bolts. Die casting tools, forming dies, die inserts, hot shear blades.

Equivalent Grades

American German Japanese China Poland
  (W.Nr) (DIN)      
AISI H-21 1.2581X30WCrV9-3SKD-53Cr2W8VWWV

Chemical Composition (AISI H-21)

  C Si Mn P S Cr Mo V W Co Ni
AISI H-21

Properties

Coefficient of thermal expansionat °C20-10020-20020-30020-40020-50020-60020-700
10-6 m/(m*K)11.211.912.212.512.81313.2



Thermal Conductivity at °C100400675
W/(m*K)2729.829.1


Applications

1.Pressure Die Casting Tools

2.Extrusion

3.Forming of parts

4.Container for Metal Tube

5.Copper Extrusion


Heat Treatment

Soft annealing °CCoolingHardness HB
780 – 810Slowlymax. 240



Hardening °CQuenchingHardness after quenching HRC
1000 – 1130Oil or hot bath, 600 – 650 °C53



Tempering °C after Quenching100200300400500550600650700
HRC494949495151504646
Tempreing Curve: