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Spain UNE C79 Steels for hot-formed and heat-treated spring and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: C79 / C 79
Category Grade Standard Region/Area Standard Content
Metals C 79 UNE 36015 Spain Steels for hot-formed and heat-treated spring

Chemical composition(mass fraction)(wt.%) of the C 79

Element Min Max Similar
Si 0.1500 0.4000 -
S - 0.0350 -
P - 0.0350 -
Mn 0.5000 0.8000 -
C 0.7200 0.8500 -

Mechanical Properties of steel grade C 79

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)
663 (≥) 864 (≥) 13 32 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 344

Physical Properties of steel grade C 79

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
24 - -     0.34 -  
499 662 - 23.3 444   -  
212 - 33 23.2   413 421

Heat Treatment of steel grade C 79

Heat treated : 1871°C - 1829°C

Technological Curves of steel grade C 79

Cross Reference Table (Equivalent Grade) of C 79

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