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S31727 Stainless Steel vs. C72500 Copper-nickel

S31727 stainless steel belongs to the iron alloys classification, while C72500 copper-nickel belongs to the copper alloys. There are 21 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is S31727 stainless steel and the bottom bar is C72500 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Poisson's Ratio 0.28
0.34
Rockwell B Hardness 83
75 to 100
Shear Modulus, GPa 78
45
Tensile Strength: Ultimate (UTS), MPa 630
420 to 780

Thermal Properties

Latent Heat of Fusion, J/g 290
210
Maximum Temperature: Mechanical, °C 1010
210
Melting Completion (Liquidus), °C 1440
1130
Melting Onset (Solidus), °C 1390
1060
Specific Heat Capacity, J/kg-K 470
390
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 24
35
Density, g/cm3 8.0
8.9
Embodied Carbon, kg CO2/kg material 4.7
3.6
Embodied Energy, MJ/kg 64
55
Embodied Water, L/kg 180
320

Common Calculations

Stiffness to Weight: Axial, points 14
7.6
Stiffness to Weight: Bending, points 24
19
Strength to Weight: Axial, points 22
13 to 24
Strength to Weight: Bending, points 20
14 to 21
Thermal Shock Resistance, points 14
14 to 27

Alloy Composition

Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 17.5 to 19
0
Copper (Cu), % 2.8 to 4.0
85.2 to 89.7
Iron (Fe), % 53.7 to 61.3
0 to 0.6
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.0
0 to 0.2
Molybdenum (Mo), % 3.8 to 4.5
0
Nickel (Ni), % 14.5 to 16.5
8.5 to 10.5
Nitrogen (N), % 0.15 to 0.21
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
1.8 to 2.8
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.2