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S21900 Stainless Steel vs. C70700 Copper-nickel

S21900 stainless steel belongs to the iron alloys classification, while C70700 copper-nickel belongs to the copper alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S21900 stainless steel and the bottom bar is C70700 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
73
Elastic (Young's, Tensile) Modulus, GPa 200
120
Elongation at Break, % 50
39
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 78
46
Shear Strength, MPa 510
220
Tensile Strength: Ultimate (UTS), MPa 710
320
Tensile Strength: Yield (Proof), MPa 390
110

Thermal Properties

Latent Heat of Fusion, J/g 290
220
Maximum Temperature: Mechanical, °C 980
220
Melting Completion (Liquidus), °C 1400
1120
Melting Onset (Solidus), °C 1350
1060
Specific Heat Capacity, J/kg-K 480
390
Thermal Conductivity, W/m-K 14
59
Thermal Expansion, µm/m-K 17
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
11
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
12

Otherwise Unclassified Properties

Base Metal Price, % relative 15
34
Density, g/cm3 7.7
8.9
Embodied Carbon, kg CO2/kg material 3.0
3.4
Embodied Energy, MJ/kg 43
52
Embodied Water, L/kg 160
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 300
100
Resilience: Unit (Modulus of Resilience), kJ/m3 380
51
Stiffness to Weight: Axial, points 14
7.6
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 26
10
Strength to Weight: Bending, points 23
12
Thermal Diffusivity, mm2/s 3.8
17
Thermal Shock Resistance, points 15
12

Alloy Composition

Carbon (C), % 0 to 0.080
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
88.5 to 90.5
Iron (Fe), % 59.4 to 67.4
0 to 0.050
Manganese (Mn), % 8.0 to 10
0 to 0.5
Nickel (Ni), % 5.5 to 7.5
9.5 to 10.5
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
Residuals, % 0
0 to 0.5