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ASTM H21

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UNS T20819 UNS T20821
#ASTM # # #H21

Description

ASTM H21 Tool Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel: ASTM H21
Category Type Steel Grade Standard Country Application
Steel GradesTool Steel ASTM H21
ASTM H11
UNS T20811
ASTM H12
UNS T20812
ASTM H13
UNS T20813
ASTM H14
UNS T20814
ASTM H19
UNS T20819

Chemical composition(mass fraction)(wt.%) of the ASTM H21

C
≤		 Si
≤		 Mn
≤		 P
≤		 S
≤		 Cr Ni
 0.26-0.36 0.15-0.5 0.15-0.4  0.03  0.03  3-3.75  
Mo Al W Nb Ti V Ce
    8.5-10.0     0.3-0.6  
N Co Pb B Other    
             
             

Mechanical Properties of steel grade ASTM H21

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
733 (≥) 792 (≥) 41 33 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 313

Physical Properties of steel grade ASTM H21

Temperature
(°C)		 Modulus of elasticity
(GPa)		 Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)		 Specific thermal capacity
(J/kg·°C)		 Specific electrical resistivity
(Ω mm²/m)		 Density
(kg/dm³)		 Poisson’s coefficient, ν
32 - -     0.32 -  
143 631 - 12.3 421   -  
369 - 32 43.2   331 344

Heat Treatment of steel grade ASTM H21

Heat treated : 1232°C - 1981°C

Technological Curves of steel grade ASTM H21

Cross Reference Table (Equivalent Grade) of ASTM H21

Grade Standard Country Application
ASTM 1030 ASTM USA General use carbon steel bar
ASTM 1005 ASTM USA General use carbon steel bar
ASTM 1006 ASTM USA General use carbon steel bar
ASTM 1008 ASTM USA General use carbon steel bar
ASTM 1010 ASTM USA General use carbon steel bar
ASTM 1013 ASTM USA General use carbon steel bar
ASTM 1015 ASTM USA General use carbon steel bar
ASTM 1016 ASTM USA General use carbon steel bar
ASTM 1017 ASTM USA General use carbon steel bar
ASTM 1018 ASTM USA General use carbon steel bar
ASTM 1019 ASTM USA General use carbon steel bar
ASTM 1020 ASTM USA General use carbon steel bar
ASTM 1021 ASTM USA General use carbon steel bar
ASTM W1-A ASTM USA Carbon tool steel
ASTM A182 F55 ASTM USA Super Duplex
ASTM 431 ASTM USA Martensitic special steel
ASTM 440A ASTM USA Martensitic special steel
ASTM 440B ASTM USA Martensitic special steel
ASTM 440C ASTM USA Martensitic special steel
ASTM 501 ASTM USA Martensitic special steel
UNS T20819 UNS T20821
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