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China HB K4242 航空用高温合金热处理工艺 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: K4242 / K4242
Category Grade Standard Region/Area Standard Content
Metals K4242 HB/Z 140 China 航空用高温合金热处理工艺

Chemical composition(mass fraction)(wt.%) of the K4242

Element Min Max Similar
Cu - 0.2000 -
Pb - 0.0020 -
Bi - 0.0001 -
Ag - 0.0005 -
Si 0.2000 0.4500 -
Mn 0.2000 0.5000 -
Nb - 0.2500 -
Fe - 0.7500 -
Ti - 0.3000 -
Al - 0.2000 -
Mo 10.0000 11.0000 -
W - 0.2000 -
Co 9.5500 11.0000 -
Ni - - -
Cr 20.0000 23.0000 -
C 0.2700 0.3500 -

Mechanical Properties of steel grade K4242

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)
764 (≥) 524 (≥) 42 21 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 442

Physical Properties of steel grade K4242

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
21 - -     0.34 -  
342 531 - 31.3 314   -  
379 - 12 41.2   122 241

Heat Treatment of steel grade K4242

Heat treated : 1757°C - 1499°C

Technological Curves of steel grade K4242

Cross Reference Table (Equivalent Grade) of K4242

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