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C72700 Copper-nickel vs. SAE-AISI A8 Steel

C72700 copper-nickel belongs to the copper alloys classification, while SAE-AISI A8 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is C72700 copper-nickel and the bottom bar is SAE-AISI A8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
190
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 44
74
Tensile Strength: Ultimate (UTS), MPa 460 to 1070
700 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 210
270
Melting Completion (Liquidus), °C 1100
1480
Melting Onset (Solidus), °C 930
1430
Specific Heat Capacity, J/kg-K 380
470
Thermal Conductivity, W/m-K 54
37
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
8.3
Electrical Conductivity: Equal Weight (Specific), % IACS 11
9.5

Otherwise Unclassified Properties

Base Metal Price, % relative 36
8.5
Density, g/cm3 8.8
7.9
Embodied Carbon, kg CO2/kg material 4.0
2.3
Embodied Energy, MJ/kg 62
31
Embodied Water, L/kg 350
73

Common Calculations

Stiffness to Weight: Axial, points 7.4
14
Stiffness to Weight: Bending, points 19
24
Strength to Weight: Axial, points 14 to 34
25 to 68
Strength to Weight: Bending, points 15 to 26
22 to 44
Thermal Diffusivity, mm2/s 16
9.9
Thermal Shock Resistance, points 16 to 38
22 to 62

Alloy Composition

Carbon (C), % 0
0.5 to 0.6
Chromium (Cr), % 0
4.8 to 5.5
Copper (Cu), % 82.1 to 86
0 to 0.25
Iron (Fe), % 0 to 0.5
88.5 to 91.9
Lead (Pb), % 0 to 0.020
0
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0.050 to 0.3
0 to 0.5
Molybdenum (Mo), % 0
1.2 to 1.7
Nickel (Ni), % 8.5 to 9.5
0 to 0.3
Niobium (Nb), % 0 to 0.1
0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0.75 to 1.1
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 5.5 to 6.5
0
Tungsten (W), % 0
1.0 to 1.5
Zinc (Zn), % 0 to 0.5
0
Residuals, % 0 to 0.3
0