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China 舞钢Q/WTB 718H 供龙记合金模具钢718系列技术条件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 718H / 718H
Category Grade Standard Region/Area Standard Content
Metals 718H WYJ 103 China 供龙记合金模具钢718系列技术条件

Chemical composition(mass fraction)(wt.%) of the 718H

Element Min Max Similar
Ni 0.9000 1.2000 -
Mo 0.2000 0.5000 -
Cr 1.8000 2.0000 -
S - 0.0100 -
P - 0.0200 -
Mn 1.1000 1.5000 -
Si 0.2000 0.4500 -
C 0.3500 0.4000 -

Mechanical Properties of steel grade 718H

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)
776 (≥) 987 (≥) 14 44 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 224

Physical Properties of steel grade 718H

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
34 - -     0.43 -  
522 588 - 34.3 213   -  
361 - 44 12.2   412 232

Heat Treatment of steel grade 718H

Heat treated : 1938°C - 1553°C

Technological Curves of steel grade 718H

Cross Reference Table (Equivalent Grade) of 718H

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