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Automotive Malleable Cast Iron vs. Nickel 686

Automotive malleable cast iron belongs to the iron alloys classification, while nickel 686 belongs to the nickel alloys. There are 27 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 automotive malleable cast iron and the bottom bar is nickel 686.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
220
Elongation at Break, % 1.0 to 10
51
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 70
77
Tensile Strength: Ultimate (UTS), MPa 350 to 720
780
Tensile Strength: Yield (Proof), MPa 220 to 590
350

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 1410
1380
Melting Onset (Solidus), °C 1370
1340
Specific Heat Capacity, J/kg-K 480
420
Thermal Conductivity, W/m-K 41
9.8
Thermal Expansion, µm/m-K 14
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
70
Density, g/cm3 7.6
9.0
Embodied Carbon, kg CO2/kg material 1.5
12
Embodied Energy, MJ/kg 20
170
Embodied Water, L/kg 45
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 30
320
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 950
280
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 13 to 26
24
Strength to Weight: Bending, points 14 to 24
21
Thermal Diffusivity, mm2/s 11
2.6
Thermal Shock Resistance, points 9.9 to 21
21

Alloy Composition

Carbon (C), % 2.2 to 2.9
0 to 0.010
Chromium (Cr), % 0
19 to 23
Iron (Fe), % 93.6 to 96.7
0 to 5.0
Manganese (Mn), % 0.15 to 1.3
0 to 0.75
Molybdenum (Mo), % 0
15 to 17
Nickel (Ni), % 0
49.5 to 63
Phosphorus (P), % 0.020 to 0.15
0 to 0.040
Silicon (Si), % 0.9 to 1.9
0 to 0.080
Sulfur (S), % 0.020 to 0.2
0 to 0.020
Titanium (Ti), % 0
0.020 to 0.25
Tungsten (W), % 0
3.0 to 4.4