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Ductile Cast Iron vs. Type 3 Magnetic Alloy

Ductile cast iron belongs to the iron alloys classification, while Type 3 magnetic alloy belongs to the nickel alloys. There are 27 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 ductile cast iron and the bottom bar is Type 3 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170 to 180
180
Elongation at Break, % 2.1 to 20
43
Poisson's Ratio 0.28 to 0.31
0.31
Shear Modulus, GPa 64 to 70
70
Shear Strength, MPa 420 to 800
380
Tensile Strength: Ultimate (UTS), MPa 460 to 920
550
Tensile Strength: Yield (Proof), MPa 310 to 670
210

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Mechanical, °C 290
910
Melting Completion (Liquidus), °C 1160
1370
Melting Onset (Solidus), °C 1120
1320
Specific Heat Capacity, J/kg-K 490
450
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
55
Density, g/cm3 7.1 to 7.5
8.7
Embodied Carbon, kg CO2/kg material 1.5
8.7
Embodied Energy, MJ/kg 21
120
Embodied Water, L/kg 43
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
190
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
120
Stiffness to Weight: Axial, points 12 to 14
12
Stiffness to Weight: Bending, points 24 to 26
22
Strength to Weight: Axial, points 17 to 35
18
Strength to Weight: Bending, points 18 to 29
17
Thermal Shock Resistance, points 17 to 35
18

Alloy Composition

Carbon (C), % 3.0 to 3.5
0 to 0.050
Chromium (Cr), % 0
2.0 to 3.0
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 0
4.0 to 6.0
Iron (Fe), % 93.7 to 95.5
9.9 to 19
Manganese (Mn), % 0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
75 to 78
Phosphorus (P), % 0 to 0.080
0 to 0.010
Silicon (Si), % 1.5 to 2.8
0 to 0.5
Sulfur (S), % 0
0 to 0.020