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England B.S. HC4 Specification for 3% chromium-molybdenum steel castings (620-770 N/mm2) and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: HC4 / HC 4
Category Grade Standard Region/Area Standard Content
Metals HC 4 BS HC 4 England Specification for 3% chromium-molybdenum steel castings (620-770 N/mm2)

Chemical composition(mass fraction)(wt.%) of the HC 4

Element Min Max Similar

Mechanical Properties of steel grade HC 4

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)
511 (≥) 981 (≥) 21 42 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 132

Physical Properties of steel grade HC 4

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
23 - -     0.13 -  
129 864 - 42.3 432   -  
858 - 21 23.2   334 333

Heat Treatment of steel grade HC 4

Heat treated : 1884°C - 1591°C

Technological Curves of steel grade HC 4

Cross Reference Table (Equivalent Grade) of HC 4

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