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Grade 20 Cast Iron vs. C70700 Copper-nickel

Grade 20 cast iron belongs to the iron alloys classification, while C70700 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 grade 20 cast iron and the bottom bar is C70700 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
73
Elastic (Young's, Tensile) Modulus, GPa 180
120
Elongation at Break, % 9.6
39
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 69
46
Shear Strength, MPa 180
220
Tensile Strength: Ultimate (UTS), MPa 160
320
Tensile Strength: Yield (Proof), MPa 98
110

Thermal Properties

Latent Heat of Fusion, J/g 280
220
Melting Completion (Liquidus), °C 1380
1120
Melting Onset (Solidus), °C 1180
1060
Specific Heat Capacity, J/kg-K 490
390
Thermal Conductivity, W/m-K 46
59
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
11
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
12

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
34
Density, g/cm3 7.5
8.9
Embodied Carbon, kg CO2/kg material 1.5
3.4
Embodied Energy, MJ/kg 21
52
Embodied Water, L/kg 44
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13
100
Resilience: Unit (Modulus of Resilience), kJ/m3 27
51
Stiffness to Weight: Axial, points 13
7.6
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 5.8
10
Strength to Weight: Bending, points 8.7
12
Thermal Diffusivity, mm2/s 13
17
Thermal Shock Resistance, points 6.0
12

Alloy Composition

Carbon (C), % 3.1 to 3.4
0
Copper (Cu), % 0
88.5 to 90.5
Iron (Fe), % 92.1 to 93.9
0 to 0.050
Manganese (Mn), % 0.5 to 0.7
0 to 0.5
Nickel (Ni), % 0
9.5 to 10.5
Phosphorus (P), % 0 to 0.9
0
Silicon (Si), % 2.5 to 2.8
0
Sulfur (S), % 0 to 0.15
0
Residuals, % 0
0 to 0.5