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C70700 Copper-nickel vs. EN 1.7725 Steel

C70700 copper-nickel belongs to the copper alloys classification, while EN 1.7725 steel belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is C70700 copper-nickel and the bottom bar is EN 1.7725 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 73
250 to 300
Elastic (Young's, Tensile) Modulus, GPa 120
190
Elongation at Break, % 39
14
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 46
73
Tensile Strength: Ultimate (UTS), MPa 320
830 to 1000
Tensile Strength: Yield (Proof), MPa 110
610 to 860

Thermal Properties

Latent Heat of Fusion, J/g 220
250
Maximum Temperature: Mechanical, °C 220
440
Melting Completion (Liquidus), °C 1120
1460
Melting Onset (Solidus), °C 1060
1420
Specific Heat Capacity, J/kg-K 390
470
Thermal Conductivity, W/m-K 59
39
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 12
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 34
2.9
Density, g/cm3 8.9
7.8
Embodied Carbon, kg CO2/kg material 3.4
1.8
Embodied Energy, MJ/kg 52
24
Embodied Water, L/kg 300
54

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
110 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 51
980 to 1940
Stiffness to Weight: Axial, points 7.6
13
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 10
29 to 35
Strength to Weight: Bending, points 12
25 to 28
Thermal Diffusivity, mm2/s 17
11
Thermal Shock Resistance, points 12
24 to 29

Alloy Composition

Carbon (C), % 0
0.27 to 0.34
Chromium (Cr), % 0
1.3 to 1.7
Copper (Cu), % 88.5 to 90.5
0
Iron (Fe), % 0 to 0.050
95.7 to 97.5
Manganese (Mn), % 0 to 0.5
0.6 to 1.0
Molybdenum (Mo), % 0
0.3 to 0.5
Nickel (Ni), % 9.5 to 10.5
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0
0 to 0.6
Sulfur (S), % 0
0 to 0.030
Vanadium (V), % 0
0.050 to 0.15
Residuals, % 0 to 0.5
0