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International ISO 2CD78B Steel wire rod - Part 2: Quality requirements for unalloyed steel wire rods for conversion to wire and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: 2CD78B / 2CD78B
Category Grade Standard Region/Area Standard Content
Metals 2CD78B ISO 8457-2 International Steel wire rod - Part 2: Quality requirements for unalloyed steel wire rods for conversion to wire

Chemical composition(mass fraction)(wt.%) of the 2CD78B

Element Min Max Similar
Si 0.1000 0.3500 -
S - 0.0400 -
P - 0.0400 -
Mn 0.6000 1.0000 -
C 0.7500 0.8000 -

Mechanical Properties of steel grade 2CD78B

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)
591 (≥) 685 (≥) 13 14 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 431

Physical Properties of steel grade 2CD78B

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 - -     0.12 -  
872 439 - 13.3 443   -  
416 - 22 42.2   331 414

Heat Treatment of steel grade 2CD78B

Heat treated : 1913°C - 1462°C

Technological Curves of steel grade 2CD78B

Cross Reference Table (Equivalent Grade) of 2CD78B

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