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C72700 Copper-nickel vs. EN 1.4729 Stainless Steel

C72700 copper-nickel belongs to the copper alloys classification, while EN 1.4729 stainless steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is C72700 copper-nickel and the bottom bar is EN 1.4729 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
190
Elongation at Break, % 4.0 to 36
15
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 44
75

Thermal Properties

Latent Heat of Fusion, J/g 210
300
Maximum Temperature: Mechanical, °C 200
850
Melting Completion (Liquidus), °C 1100
1420
Melting Onset (Solidus), °C 930
1380
Specific Heat Capacity, J/kg-K 380
490
Thermal Conductivity, W/m-K 54
24
Thermal Expansion, µm/m-K 17
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 11
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 36
7.5
Density, g/cm3 8.8
7.6
Embodied Carbon, kg CO2/kg material 4.0
2.1
Embodied Energy, MJ/kg 62
29
Embodied Water, L/kg 350
100

Common Calculations

Stiffness to Weight: Axial, points 7.4
14
Stiffness to Weight: Bending, points 19
25
Thermal Diffusivity, mm2/s 16
6.5

Alloy Composition

Carbon (C), % 0
0.3 to 0.5
Chromium (Cr), % 0
12 to 14
Copper (Cu), % 82.1 to 86
0
Iron (Fe), % 0 to 0.5
80.4 to 86.7
Lead (Pb), % 0 to 0.020
0
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0.050 to 0.3
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 8.5 to 9.5
0 to 1.0
Niobium (Nb), % 0 to 0.1
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
1.0 to 2.5
Sulfur (S), % 0
0 to 0.030
Tin (Sn), % 5.5 to 6.5
0
Zinc (Zn), % 0 to 0.5
0
Residuals, % 0 to 0.3
0