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S21904 Stainless Steel vs. C71000 Copper-nickel

S21904 stainless steel belongs to the iron alloys classification, while C71000 copper-nickel belongs to the copper alloys. There are 24 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 S21904 stainless steel and the bottom bar is C71000 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
130
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 78
49
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
320 to 560

Thermal Properties

Latent Heat of Fusion, J/g 290
230
Maximum Temperature: Mechanical, °C 980
240
Melting Completion (Liquidus), °C 1400
1200
Melting Onset (Solidus), °C 1350
1150
Specific Heat Capacity, J/kg-K 480
400
Thermal Conductivity, W/m-K 14
43
Thermal Expansion, µm/m-K 17
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
6.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
6.6

Otherwise Unclassified Properties

Base Metal Price, % relative 15
37
Density, g/cm3 7.7
8.9
Embodied Carbon, kg CO2/kg material 3.0
4.3
Embodied Energy, MJ/kg 43
63
Embodied Water, L/kg 160
290

Common Calculations

Stiffness to Weight: Axial, points 14
8.2
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 25 to 36
10 to 18
Strength to Weight: Bending, points 23 to 29
12 to 17
Thermal Diffusivity, mm2/s 3.8
12
Thermal Shock Resistance, points 15 to 21
12 to 20

Alloy Composition

Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
73.5 to 80.5
Iron (Fe), % 59.5 to 67.4
0.5 to 1.0
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 8.0 to 10
0 to 1.0
Nickel (Ni), % 5.5 to 7.5
19 to 23
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5