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EN 1.4971 Stainless Steel vs. C71640 Copper-nickel

EN 1.4971 stainless steel belongs to the iron alloys classification, while C71640 copper-nickel belongs to the copper alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 24 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.4971 stainless steel and the bottom bar is C71640 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 81
52
Tensile Strength: Ultimate (UTS), MPa 800
490 to 630
Tensile Strength: Yield (Proof), MPa 340
190 to 460

Thermal Properties

Latent Heat of Fusion, J/g 300
240
Maximum Temperature: Mechanical, °C 1100
260
Melting Completion (Liquidus), °C 1460
1180
Melting Onset (Solidus), °C 1410
1120
Specific Heat Capacity, J/kg-K 450
410
Thermal Conductivity, W/m-K 13
29
Thermal Expansion, µm/m-K 15
15

Otherwise Unclassified Properties

Base Metal Price, % relative 70
40
Density, g/cm3 8.4
8.9
Embodied Carbon, kg CO2/kg material 7.6
5.0
Embodied Energy, MJ/kg 110
73
Embodied Water, L/kg 300
280

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 280
130 to 750
Stiffness to Weight: Axial, points 14
8.7
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 26
15 to 20
Strength to Weight: Bending, points 23
16 to 18
Thermal Diffusivity, mm2/s 3.4
8.2
Thermal Shock Resistance, points 19
16 to 21

Alloy Composition

Carbon (C), % 0.080 to 0.16
0
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Copper (Cu), % 0
61.7 to 67.8
Iron (Fe), % 24.3 to 37.1
1.7 to 2.3
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 2.0
1.5 to 2.5
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
29 to 32
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.015
0
Tungsten (W), % 2.0 to 3.0
0
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5