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S21904 Stainless Steel vs. C70260 Copper

S21904 stainless steel belongs to the iron alloys classification, while C70260 copper belongs to the copper alloys. There are 29 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 S21904 stainless steel and the bottom bar is C70260 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Elongation at Break, % 17 to 51
9.5 to 19
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 78
44
Shear Strength, MPa 510 to 620
320 to 450
Tensile Strength: Ultimate (UTS), MPa 700 to 1000
520 to 760
Tensile Strength: Yield (Proof), MPa 390 to 910
410 to 650

Thermal Properties

Latent Heat of Fusion, J/g 290
220
Maximum Temperature: Mechanical, °C 980
200
Melting Completion (Liquidus), °C 1400
1060
Melting Onset (Solidus), °C 1350
1040
Specific Heat Capacity, J/kg-K 480
390
Thermal Conductivity, W/m-K 14
160
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
40 to 50
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
40 to 51

Otherwise Unclassified Properties

Base Metal Price, % relative 15
31
Density, g/cm3 7.7
8.9
Embodied Carbon, kg CO2/kg material 3.0
2.7
Embodied Energy, MJ/kg 43
43
Embodied Water, L/kg 160
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 160 to 310
46 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 2070
710 to 1810
Stiffness to Weight: Axial, points 14
7.3
Stiffness to Weight: Bending, points 25
18
Strength to Weight: Axial, points 25 to 36
16 to 24
Strength to Weight: Bending, points 23 to 29
16 to 21
Thermal Diffusivity, mm2/s 3.8
45
Thermal Shock Resistance, points 15 to 21
18 to 27

Alloy Composition

Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 19 to 21.5
0
Copper (Cu), % 0
95.8 to 98.8
Iron (Fe), % 59.5 to 67.4
0
Manganese (Mn), % 8.0 to 10
0
Nickel (Ni), % 5.5 to 7.5
1.0 to 3.0
Nitrogen (N), % 0.15 to 0.4
0
Phosphorus (P), % 0 to 0.045
0 to 0.010
Silicon (Si), % 0 to 1.0
0.2 to 0.7
Sulfur (S), % 0 to 0.030
0
Residuals, % 0
0 to 0.5