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ACI-ASTM CF20 Steel vs. C70620 Copper-nickel

ACI-ASTM CF20 steel belongs to the iron alloys classification, while C70620 copper-nickel belongs to the copper alloys. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF20 steel and the bottom bar is C70620 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
120
Poisson's Ratio 0.28
0.34
Shear Modulus, GPa 77
46
Tensile Strength: Ultimate (UTS), MPa 530
300 to 570

Thermal Properties

Latent Heat of Fusion, J/g 300
220
Maximum Temperature: Mechanical, °C 970
220
Melting Completion (Liquidus), °C 1420
1120
Melting Onset (Solidus), °C 1410
1060
Specific Heat Capacity, J/kg-K 480
390
Thermal Conductivity, W/m-K 16
49
Thermal Expansion, µm/m-K 17
17

Otherwise Unclassified Properties

Base Metal Price, % relative 16
33
Density, g/cm3 7.8
8.9
Embodied Carbon, kg CO2/kg material 3.1
3.4
Embodied Energy, MJ/kg 44
51
Embodied Water, L/kg 150
300

Common Calculations

Stiffness to Weight: Axial, points 14
7.7
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 19
9.3 to 18
Strength to Weight: Bending, points 19
11 to 17
Thermal Diffusivity, mm2/s 4.3
14
Thermal Shock Resistance, points 11
10 to 20

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.050
Chromium (Cr), % 18 to 21
0
Copper (Cu), % 0
86.5 to 90
Iron (Fe), % 64.2 to 74
1.0 to 1.8
Lead (Pb), % 0
0 to 0.020
Manganese (Mn), % 0 to 1.5
0 to 1.0
Nickel (Ni), % 8.0 to 11
9.0 to 11
Phosphorus (P), % 0 to 0.040
0 to 0.2
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0 to 0.020
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.5