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America UNS K91970 马氏体时效钢 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: K91970 / K91970
Category Grade Standard Region/Area Standard Content
Metals K91970 -- America 马氏体时效钢

Chemical composition(mass fraction)(wt.%) of the K91970

Element Min Max Similar

Mechanical Properties of steel grade K91970

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)
777 (≥) 978 (≥) 41 44 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical Properties of steel grade K91970

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
12 - -     0.12 -  
198 235 - 41.3 222   -  
575 - 34 42.2   233 123

Heat Treatment of steel grade K91970

Heat treated : 1312°C - 1742°C

Technological Curves of steel grade K91970

Cross Reference Table (Equivalent Grade) of K91970

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