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EN C78D Details

Non-alloy steel wire rod for conversion to wire - Part 2: Specific requirements for general-purpose wire rod

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C78D Application:Non-alloy steel wire rod for conversion to wire - Part 2: Specific requirements for general-purpose wire rod
Category Type Grade Designations
Grades Structural Steel C78D European - EN , EN 10016-2 (1994) - Non-alloy steel rod for drawing and/or cold rolling - Part 2: Specific requirements for general purposes rod
EN ISO 16120-2 (2011) - Non-alloy steel wire rod for conversion to wire - Part 2: Specific requirements for general-purpose wire rod
Chemical composition(mass fraction)(wt.%)
Elements Min.(≥) Max.(≤) Similar Remarks
C 0.75 0.80
Si 0.10 0.30
Mn 0.50 0.80
P - 0.035
S - 0.035
Cr - 0.15
Ni - 0.20
Cu - 0.25
Mechanical properties of grade C78D
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)
624 (≥) 826 (≥) 44 13 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 423
Physical properties of grade C78D
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
178 (≥) 589 (≥) 34 43 43 Solution and Aging, Annealing, Ausaging, Q+T,etc 443
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
941 468 435
C78D 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
C78D EN European
Non-alloy steel wire rod for conversion to wire - Part 2: Specific requirements for general-purpose wire rod