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China GB GH4080A 内燃机气阀用钢及合金棒材 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: GH4080A / GH 4080A
Category Grade Standard Region/Area Standard Content
Metals GH 4080A GB/T 12773 China 内燃机气阀用钢及合金棒材

Chemical composition(mass fraction)(wt.%) of the GH 4080A

Element Min Max Similar
Ti 1.8000 2.7000 -
Si - 0.8000 -
S - 0.0150 -
Pb - 0.0020 -
P - 0.0200 -
Ni - - -
Mn - 0.4000 -
Fe - 1.5000 -
Cu - 0.2000 -
Cr 18.0000 21.0000 -
Co - 2.0000 -
C 0.0400 0.1000 -
Bi - 0.0001 -
B - 0.0080 -
Al 1.0000 1.8000 -
Ag - 0.0005 -
Ti 1.8000 2.7000 -
Si - 0.8000 -
S - 0.0150 -
P - 0.0200 -
Ni - - -
Mn - 0.4000 -
Fe - 1.5000 -
Cu - 0.2000 -
Cr 18.0000 21.0000 -
Co - 2.0000 -
C 0.0400 0.1000 -
B - 0.0080 -
Al 1.0000 1.8000 -
Ti 1.8000 2.7000 -
Si - 1.0000 -
S - 0.0150 -
P - 0.0200 -
Ni - - -
Mn - 1.0000 -
Fe - 3.0000 -
Cu - 0.2000 -
Cr 18.0000 21.0000 -
Co - 2.0000 -
C 0.0400 0.1000 -
B - 0.0080 -
Al 1.0000 1.8000 -

Mechanical Properties of steel grade GH 4080A

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)
243 (≥) 791 (≥) 43 23 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 132

Physical Properties of steel grade GH 4080A

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 - -     0.13 -  
981 286 - 11.3 433   -  
512 - 32 34.2   324 232

Heat Treatment of steel grade GH 4080A

Heat treated : 1423°C - 1739°C

Technological Curves of steel grade GH 4080A

Cross Reference Table (Equivalent Grade) of GH 4080A

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