C75 Structural Steel to DIN 17222 (1979)

C75 - Specification & Application

  • DIN 17222 (1979) - Cold Rolled Steel Strips for Springs; Technical Conditions of Delivery

Cold Rolled Steel Strips for Springs; Technical Conditions of Delivery

Chemical composition(wt.%) of C75 grade: to DIN 17222 (1979)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.70 0.80
Si 0.15 0.35
Mn 0.60 0.80
P - 0.045
S - 0.045
Cr - -
Ni - -
Mo - -
Cu - -

C75 - Detail

Cold Rolled Steel Strips for Springs; Technical Conditions of Delivery

Mechanical properties of grade C75 DIN 17222 (1979)

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
372 (≥) 949 (≥) 21 11 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 312

Physical properties of grade C75 DIN 17222 (1979)

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
973 (≥) 141 (≥) 11 11 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 413
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
878 713 377

Equivalent Products

We can customize the production of C75 grade, contact us for the best solution.
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