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C 7 E / Ck 7

Germany DIN C7E/Ck7 Relay iron and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: C7E/Ck7 / C 7 E / Ck 7
Category Grade Standard Region/Area Standard Content
Metals C 7 E / Ck 7 -- Germany Relay iron

Chemical composition(mass fraction)(wt.%) of the C 7 E / Ck 7

Element Min Max Similar
Si - 0.1500 -
S - 0.0350 -
P - 0.0350 -
Mn - 0.5000 -
C - 0.0800 -

Mechanical Properties of steel grade C 7 E / Ck 7

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)
824 (≥) 334 (≥) 24 11 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 332

Physical Properties of steel grade C 7 E / Ck 7

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 - -     0.43 -  
846 312 - 23.3 421   -  
469 - 22 12.2   144 442

Heat Treatment of steel grade C 7 E / Ck 7

Heat treated : 1974°C - 1569°C

Technological Curves of steel grade C 7 E / Ck 7

Cross Reference Table (Equivalent Grade) of C 7 E / Ck 7

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