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Grade 20 Cast Iron vs. C70600 Copper-nickel

Grade 20 cast iron belongs to the iron alloys classification, while C70600 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 C70600 copper-nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
120
Elongation at Break, % 9.6
3.0 to 34
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 69
46
Shear Strength, MPa 180
190 to 330
Tensile Strength: Ultimate (UTS), MPa 160
290 to 570
Tensile Strength: Yield (Proof), MPa 98
63 to 270

Thermal Properties

Latent Heat of Fusion, J/g 280
220
Melting Completion (Liquidus), °C 1380
1150
Melting Onset (Solidus), °C 1180
1100
Specific Heat Capacity, J/kg-K 490
390
Thermal Conductivity, W/m-K 46
44
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
9.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
9.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
33
Density, g/cm3 7.5
8.9
Embodied Carbon, kg CO2/kg material 1.5
3.4
Embodied Energy, MJ/kg 21
51
Embodied Water, L/kg 44
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13
6.5 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 27
16 to 290
Stiffness to Weight: Axial, points 13
7.7
Stiffness to Weight: Bending, points 25
19
Strength to Weight: Axial, points 5.8
9.1 to 18
Strength to Weight: Bending, points 8.7
11 to 17
Thermal Diffusivity, mm2/s 13
13
Thermal Shock Resistance, points 6.0
9.8 to 19

Alloy Composition

Carbon (C), % 3.1 to 3.4
0
Copper (Cu), % 0
84.7 to 90
Iron (Fe), % 92.1 to 93.9
1.0 to 1.8
Lead (Pb), % 0
0 to 0.050
Manganese (Mn), % 0.5 to 0.7
0 to 1.0
Nickel (Ni), % 0
9.0 to 11
Phosphorus (P), % 0 to 0.9
0
Silicon (Si), % 2.5 to 2.8
0
Sulfur (S), % 0 to 0.15
0
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.5