H21

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.

Chemical Composition

CSiMnCrVW
0.310.30.292.80.58.5

Standards

H211.258132CDV12-28

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
Soft annealing °CCoolingHardness HB
780 – 810Slowlymax. 240
Hardening °CQuenchingHardness after quenching HRC
1000 – 1130Oil or hot bath, 600 – 650 °C53
Tempering °C after Quenching100200300400500550600650700
HRC494949495151504636