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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)
559 (≥) 594 (≥) 23 31 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 444

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
22 - -     0.23 -  
689 411 - 34.3 324   -  
188 - 12 14.2   331 231

Heat Treatment of steel grade HC 4

Heat treated : 1583°C - 1884°C

Technological Curves of steel grade HC 4

Cross Reference Table (Equivalent Grade) of HC 4

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