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C72700 Copper-nickel vs. AISI 446 Stainless Steel

C72700 copper-nickel belongs to the copper alloys classification, while AISI 446 stainless steel belongs to the iron alloys. There are 29 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 AISI 446 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
200
Elongation at Break, % 4.0 to 36
23
Poisson's Ratio 0.34
0.27
Shear Modulus, GPa 44
79
Shear Strength, MPa 310 to 620
360
Tensile Strength: Ultimate (UTS), MPa 460 to 1070
570
Tensile Strength: Yield (Proof), MPa 580 to 1060
300

Thermal Properties

Latent Heat of Fusion, J/g 210
290
Maximum Temperature: Mechanical, °C 200
1180
Melting Completion (Liquidus), °C 1100
1510
Melting Onset (Solidus), °C 930
1430
Specific Heat Capacity, J/kg-K 380
490
Thermal Conductivity, W/m-K 54
17
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 11
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 36
12
Density, g/cm3 8.8
7.7
Embodied Carbon, kg CO2/kg material 4.0
2.4
Embodied Energy, MJ/kg 62
35
Embodied Water, L/kg 350
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 380
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1420 to 4770
230
Stiffness to Weight: Axial, points 7.4
15
Stiffness to Weight: Bending, points 19
26
Strength to Weight: Axial, points 14 to 34
21
Strength to Weight: Bending, points 15 to 26
20
Thermal Diffusivity, mm2/s 16
4.6
Thermal Shock Resistance, points 16 to 38
19

Alloy Composition

Carbon (C), % 0
0 to 0.2
Chromium (Cr), % 0
23 to 27
Copper (Cu), % 82.1 to 86
0
Iron (Fe), % 0 to 0.5
69.2 to 77
Lead (Pb), % 0 to 0.020
0
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0.050 to 0.3
0 to 1.5
Nickel (Ni), % 8.5 to 9.5
0 to 0.75
Niobium (Nb), % 0 to 0.1
0
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
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