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Ductile Cast Iron vs. Nickel 686

Ductile cast iron belongs to the iron alloys classification, while nickel 686 belongs to the nickel alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ductile cast iron and the bottom bar is nickel 686.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170 to 180
220
Elongation at Break, % 2.1 to 20
51
Poisson's Ratio 0.28 to 0.31
0.29
Shear Modulus, GPa 64 to 70
77
Shear Strength, MPa 420 to 800
560
Tensile Strength: Ultimate (UTS), MPa 460 to 920
780
Tensile Strength: Yield (Proof), MPa 310 to 670
350

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Maximum Temperature: Mechanical, °C 290
980
Melting Completion (Liquidus), °C 1160
1380
Melting Onset (Solidus), °C 1120
1340
Specific Heat Capacity, J/kg-K 490
420
Thermal Conductivity, W/m-K 31 to 36
9.8
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
70
Density, g/cm3 7.1 to 7.5
9.0
Embodied Carbon, kg CO2/kg material 1.5
12
Embodied Energy, MJ/kg 21
170
Embodied Water, L/kg 43
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
320
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
280
Stiffness to Weight: Axial, points 12 to 14
14
Stiffness to Weight: Bending, points 24 to 26
22
Strength to Weight: Axial, points 17 to 35
24
Strength to Weight: Bending, points 18 to 29
21
Thermal Diffusivity, mm2/s 8.9 to 10
2.6
Thermal Shock Resistance, points 17 to 35
21

Alloy Composition

Carbon (C), % 3.0 to 3.5
0 to 0.010
Chromium (Cr), % 0
19 to 23
Iron (Fe), % 93.7 to 95.5
0 to 5.0
Manganese (Mn), % 0
0 to 0.75
Molybdenum (Mo), % 0
15 to 17
Nickel (Ni), % 0
49.5 to 63
Phosphorus (P), % 0 to 0.080
0 to 0.040
Silicon (Si), % 1.5 to 2.8
0 to 0.080
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0.020 to 0.25
Tungsten (W), % 0
3.0 to 4.4