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Japan DAIDO DH21 工具钢产品列表 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: DH21 / DH21
Category Grade Standard Region/Area Standard Content
Metals DH21 DAIDO TSPL Japan 工具钢产品列表

Chemical composition(mass fraction)(wt.%) of the DH21

Element Min Max Similar
V - - 1.0000
Mo - - 2.0000
Cr - - 5.3000
Mn - - 0.6000
Si - - 0.3000
C - - 0.3900

Mechanical Properties of steel grade DH21

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)
729 (≥) 644 (≥) 14 24 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 234

Physical Properties of steel grade DH21

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
13 - -     0.11 -  
348 146 - 43.3 344   -  
116 - 34 23.2   444 413

Heat Treatment of steel grade DH21

Heat treated : 1817°C - 1548°C

Technological Curves of steel grade DH21

Cross Reference Table (Equivalent Grade) of DH21

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