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DIN C75 Details

Cold Rolled Steel Strips for Springs; Technical Conditions of Delivery

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C75 Application:Cold Rolled Steel Strips for Springs; Technical Conditions of Delivery
Category Type Grade Designations
Grades Structural Steel C75 Germany - DIN , DIN 17222 (1979) - Cold Rolled Steel Strips for Springs; Technical Conditions of Delivery
Chemical composition(mass fraction)(wt.%)
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 - -
Mechanical properties of grade C75
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)
213 (≥) 628 (≥) 21 13 32 Solution and Aging, Annealing, Ausaging, Q+T,etc 141
Physical properties of grade C75
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
743 (≥) 196 (≥) 14 21 41 Solution and Aging, Annealing, Ausaging, Q+T,etc 124
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
716 855 947
C75 Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
C75 DIN Germany
Cold Rolled Steel Strips for Springs; Technical Conditions of Delivery
C75S EN Whole
Cold rolled narrow steel strip for heat treatment - Technical delivery conditions - Part 4: Spring steels and other applications
C75W DIN Germany
High carbon steel