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ACI-ASTM CF20 Steel vs. C71580 Copper-nickel

ACI-ASTM CF20 steel belongs to the iron alloys classification, while C71580 copper-nickel 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 ACI-ASTM CF20 steel and the bottom bar is C71580 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
75
Elastic (Young's, Tensile) Modulus, GPa 200
140
Elongation at Break, % 50
40
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
51
Tensile Strength: Ultimate (UTS), MPa 530
330
Tensile Strength: Yield (Proof), MPa 250
110

Thermal Properties

Latent Heat of Fusion, J/g 300
230
Maximum Temperature: Mechanical, °C 970
260
Melting Completion (Liquidus), °C 1420
1180
Melting Onset (Solidus), °C 1410
1120
Specific Heat Capacity, J/kg-K 480
400
Thermal Conductivity, W/m-K 16
39
Thermal Expansion, µm/m-K 17
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
4.7

Otherwise Unclassified Properties

Base Metal Price, % relative 16
41
Density, g/cm3 7.8
8.9
Embodied Carbon, kg CO2/kg material 3.1
5.1
Embodied Energy, MJ/kg 44
74
Embodied Water, L/kg 150
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
100
Resilience: Unit (Modulus of Resilience), kJ/m3 160
47
Stiffness to Weight: Axial, points 14
8.5
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 19
10
Strength to Weight: Bending, points 19
12
Thermal Diffusivity, mm2/s 4.3
11
Thermal Shock Resistance, points 11
11

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.070
Chromium (Cr), % 18 to 21
0
Copper (Cu), % 0
65.5 to 71
Iron (Fe), % 64.2 to 74
0 to 0.5
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0 to 1.5
0 to 0.3
Nickel (Ni), % 8.0 to 11
29 to 33
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
0 to 0.050
Residuals, % 0
0 to 0.5