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Grade 20 Cast Iron vs. C71520 Copper-nickel

Grade 20 cast iron belongs to the iron alloys classification, while C71520 copper-nickel belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is grade 20 cast iron and the bottom bar is C71520 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
140
Elongation at Break, % 9.6
10 to 45
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 69
51
Shear Strength, MPa 180
250 to 340
Tensile Strength: Ultimate (UTS), MPa 160
370 to 570
Tensile Strength: Yield (Proof), MPa 98
140 to 430

Thermal Properties

Latent Heat of Fusion, J/g 280
230
Melting Completion (Liquidus), °C 1380
1170
Melting Onset (Solidus), °C 1180
1120
Specific Heat Capacity, J/kg-K 490
400
Thermal Conductivity, W/m-K 46
32
Thermal Expansion, µm/m-K 11
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
5.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
5.8

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
40
Density, g/cm3 7.5
8.9
Embodied Carbon, kg CO2/kg material 1.5
5.0
Embodied Energy, MJ/kg 21
73
Embodied Water, L/kg 44
280

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13
54 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 27
67 to 680
Stiffness to Weight: Axial, points 13
8.6
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 5.8
12 to 18
Strength to Weight: Bending, points 8.7
13 to 17
Thermal Diffusivity, mm2/s 13
8.9
Thermal Shock Resistance, points 6.0
12 to 19

Alloy Composition

Carbon (C), % 3.1 to 3.4
0 to 0.050
Copper (Cu), % 0
65 to 71.6
Iron (Fe), % 92.1 to 93.9
0.4 to 1.0
Lead (Pb), % 0
0 to 0.020
Manganese (Mn), % 0.5 to 0.7
0 to 1.0
Nickel (Ni), % 0
28 to 33
Phosphorus (P), % 0 to 0.9
0 to 0.2
Silicon (Si), % 2.5 to 2.8
0
Sulfur (S), % 0 to 0.15
0 to 0.020
Zinc (Zn), % 0
0 to 0.5
Residuals, % 0
0 to 0.5