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S21800 Stainless Steel vs. C72700 Copper-nickel

S21800 stainless steel belongs to the iron alloys classification, while C72700 copper-nickel belongs to the copper alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is C72700 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
120
Elongation at Break, % 40
4.0 to 36
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 75
44
Shear Strength, MPa 510
310 to 620
Tensile Strength: Ultimate (UTS), MPa 740
460 to 1070
Tensile Strength: Yield (Proof), MPa 390
580 to 1060

Thermal Properties

Latent Heat of Fusion, J/g 340
210
Maximum Temperature: Mechanical, °C 900
200
Melting Completion (Liquidus), °C 1360
1100
Melting Onset (Solidus), °C 1310
930
Specific Heat Capacity, J/kg-K 500
380
Thermal Expansion, µm/m-K 16
17

Otherwise Unclassified Properties

Base Metal Price, % relative 15
36
Density, g/cm3 7.5
8.8
Embodied Carbon, kg CO2/kg material 3.1
4.0
Embodied Energy, MJ/kg 45
62
Embodied Water, L/kg 150
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
20 to 380
Resilience: Unit (Modulus of Resilience), kJ/m3 390
1420 to 4770
Stiffness to Weight: Axial, points 14
7.4
Stiffness to Weight: Bending, points 26
19
Strength to Weight: Axial, points 27
14 to 34
Strength to Weight: Bending, points 24
15 to 26
Thermal Shock Resistance, points 17
16 to 38

Alloy Composition

Carbon (C), % 0 to 0.1
0
Chromium (Cr), % 16 to 18
0
Copper (Cu), % 0
82.1 to 86
Iron (Fe), % 59.1 to 65.4
0 to 0.5
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 7.0 to 9.0
0.050 to 0.3
Nickel (Ni), % 8.0 to 9.0
8.5 to 9.5
Niobium (Nb), % 0
0 to 0.1
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0
Silicon (Si), % 3.5 to 4.5
0
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
5.5 to 6.5
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.3