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Grade 4 Class C

India IS Grade4ClassC Alloy Steel Castings Suitable for Pressure Service and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Grade4ClassC / Grade 4 Class C
Category Grade Standard Region/Area Standard Content
Metals Grade 4 Class C IS 7899 India Alloy Steel Castings Suitable for Pressure Service

Chemical composition(mass fraction)(wt.%) of the Grade 4 Class C

Element Min Max Similar
Si - 0.8000 -
S - 0.0450 -
P - 0.0400 -
Ni 0.4000 0.8000 -
Mo 0.1500 0.3000 -
Mn - 1.0000 -
Cr 0.4000 0.8000 -
C - 0.3000 -

Mechanical Properties of steel grade Grade 4 Class C

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)
185 (≥) 883 (≥) 24 21 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 434

Physical Properties of steel grade Grade 4 Class C

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
11 - -     0.33 -  
995 631 - 21.3 243   -  
994 - 14 31.2   222 431

Heat Treatment of steel grade Grade 4 Class C

Heat treated : 1533°C - 1287°C

Technological Curves of steel grade Grade 4 Class C

Cross Reference Table (Equivalent Grade) of Grade 4 Class C

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