Products

HOT WORK STEEL

  

Shape :
Grade :

Standards

AISI H21

H21

DIN 2581

AFNOR 32CDV12-28
X30WCrV9-3
C 0.26-036Mn 0.15-0.40 Si 0.15-0.50 Cr 3.00-3.75 V 0.30-0.60
Virat Special Steels AISI H21

Virat Special Steels is the biggest Supplier and Stockiest of Hot Work Steel AISI H21.
AISI H21 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.

Steel Properties

Hot work steel with good toughness include tungsten Chromium Carbon Vanadium usually is working hardness is 40.0 to 55.0 HRC size available in round, flat and square.

Physical Properties
Coefficient of thermal expansionat °C 20-100 20-200 20-300 20-400 20-500 20-600 20-700
10-6 m/(m*K) 11.2 11.9 12.2 12.5 12.8 13.0 13.2
Thermal Conductivity at °C 100 400 675
W/(m*K) 27.0 29.8 29.1
Application

The AISI H21 tungsten hot-work tool steels are mainly used for hot-working dies and toolings, e.g., die casting, extrusion and hot-forming of parts.

Heat Treatment
Soft annealing °C Cooling Hardness HB
780 – 810 Slowly max. 240
Hardening °C Quenching Hardness after quenching HRC
1000 – 1130 Oil or hot bath, 600 – 650 °C 53
Tempering °C after Quenching 100 200 300 400 500 550 600 650 700
HRC 49 49 49 49 51 51 50 46 36
H21
DIN 2581