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SAE-AISI P21 Steel vs. C71640 Copper-nickel

SAE-AISI P21 steel belongs to the iron alloys classification, while C71640 copper-nickel belongs to the copper alloys. There are 23 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 SAE-AISI P21 steel and the bottom bar is C71640 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
52
Tensile Strength: Ultimate (UTS), MPa 1130
490 to 630

Thermal Properties

Latent Heat of Fusion, J/g 250
240
Melting Completion (Liquidus), °C 1450
1180
Melting Onset (Solidus), °C 1410
1120
Specific Heat Capacity, J/kg-K 470
410
Thermal Conductivity, W/m-K 41
29
Thermal Expansion, µm/m-K 12
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 9.0
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
40
Density, g/cm3 7.9
8.9
Embodied Carbon, kg CO2/kg material 2.3
5.0
Embodied Energy, MJ/kg 32
73
Embodied Water, L/kg 62
280

Common Calculations

Stiffness to Weight: Axial, points 13
8.7
Stiffness to Weight: Bending, points 24
20
Strength to Weight: Axial, points 40
15 to 20
Strength to Weight: Bending, points 31
16 to 18
Thermal Diffusivity, mm2/s 11
8.2
Thermal Shock Resistance, points 37
16 to 21

Alloy Composition

Carbon (C), % 0.18 to 0.22
0
Chromium (Cr), % 0 to 0.5
0
Cobalt (Co), % 1.1 to 1.3
0
Copper (Cu), % 0 to 0.25
61.7 to 67.8
Iron (Fe), % 92.1 to 94.2
1.7 to 2.3
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0.35 to 0.72
1.5 to 2.5
Nickel (Ni), % 3.9 to 4.3
29 to 32
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.2 to 0.4
0
Sulfur (S), % 0 to 0.030
0
Vanadium (V), % 0.15 to 0.25
0
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5