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A297 Grade HK

America ASTM A297GradeHK 一般用耐热铬铁与镍铬铁合金钢铸件规格 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A297GradeHK / A297 Grade HK
Category Grade Standard Region/Area Standard Content
Metals A297 Grade HK ASTM A297/A297M America 一般用耐热铬铁与镍铬铁合金钢铸件规格

Chemical composition(mass fraction)(wt.%) of the A297 Grade HK

Element Min Max Similar
Si - 2.0000 -
S - 0.0400 -
P - 0.0400 -
Ni 18.0000 22.0000 -
Mo - 0.5000 -
Mn - 2.0000 -
Cr 24.0000 28.0000 -
C 0.2000 0.6000 -

Mechanical Properties of steel grade A297 Grade HK

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)
547 (≥) 788 (≥) 41 22 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 333

Physical Properties of steel grade A297 Grade HK

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
44 - -     0.22 -  
647 571 - 12.3 112   -  
182 - 31 43.2   332 142

Heat Treatment of steel grade A297 Grade HK

Heat treated : 1589°C - 1175°C

Technological Curves of steel grade A297 Grade HK

Cross Reference Table (Equivalent Grade) of A297 Grade HK

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