High Speed Steel
Cold Work Tool Steel
Hot Work Tool Steel
Plastic Moulding Steel

 

 
 
Hot Work Tool Steel (AISI H-21)
 
Equivalent Grades.
American
German
Japanese
China
Poland
(W.Nr.)
(DIN)
AISI H-21
1.2581
X30WCrV9-3
SKD-5
3Cr2W8V
WWV


Chemical Composition (AISI H-21)
 
 
C
Si
Mn
P
S
Cr
Mo
V
W
AISI H-21
0.30-0.40
0.15-0.30
0.20-0.40
-
-
3.00-3.75
2.00-3.00
0.30-0.50
8.75-10


  AISI H-21
 

Steel properties
Hot working steel, alloyed with tungsten giving high red strength Suitable for all types of nitriding.
 
Applications
Hot drawing dies, pressure casting moulds for heavy metals, small die inserts, deburring plates.
 
Heat treatment

Hardening from
 
1100-1150°C
In   Oil, vacuum,or hot bath
at 500-550°C

Tempering curve :-

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