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Brazil NBR ClassC Roud carbon steel spring wire – Specification and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: ClassC / Class C
Category Grade Standard Region/Area Standard Content
Metals Class C ABNT NBR 11414 Brazil Roud carbon steel spring wire – Specification

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

Element Min Max Similar
C 0.7000 1.0400 -
Mn 0.3000 1.5000 -
P - 0.0300 -
S - 0.0300 -
Si - 0.3500 -
Cu - 0.1200 -

Mechanical Properties of steel grade 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)
792 (≥) 647 (≥) 11 44 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 132

Physical Properties of steel grade 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
14 - -     0.22 -  
452 272 - 24.3 443   -  
272 - 43 12.2   413 314

Heat Treatment of steel grade Class C

Heat treated : 1214°C - 1336°C

Technological Curves of steel grade Class C

Cross Reference Table (Equivalent Grade) of Class C

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