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Ductile Cast Iron vs. AWS ERNiCr-3

Ductile cast iron belongs to the iron alloys classification, while AWS ERNiCr-3 belongs to the nickel alloys. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is ductile cast iron and the bottom bar is AWS ERNiCr-3.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170 to 180
190
Elongation at Break, % 2.1 to 20
34
Poisson's Ratio 0.28 to 0.31
0.29
Shear Modulus, GPa 64 to 70
75
Tensile Strength: Ultimate (UTS), MPa 460 to 920
630

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1160
1380
Melting Onset (Solidus), °C 1120
1330
Specific Heat Capacity, J/kg-K 490
460
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
70
Density, g/cm3 7.1 to 7.5
8.4
Embodied Carbon, kg CO2/kg material 1.5
11
Embodied Energy, MJ/kg 21
160
Embodied Water, L/kg 43
280

Common Calculations

Stiffness to Weight: Axial, points 12 to 14
13
Stiffness to Weight: Bending, points 24 to 26
23
Strength to Weight: Axial, points 17 to 35
21
Strength to Weight: Bending, points 18 to 29
19
Thermal Shock Resistance, points 17 to 35
18

Alloy Composition

Carbon (C), % 3.0 to 3.5
0 to 0.1
Chromium (Cr), % 0
18 to 22
Cobalt (Co), % 0
0 to 0.12
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 93.7 to 95.5
0 to 3.0
Manganese (Mn), % 0
2.5 to 3.5
Nickel (Ni), % 0
67 to 77.5
Niobium (Nb), % 0
2.0 to 3.0
Phosphorus (P), % 0 to 0.080
0 to 0.030
Silicon (Si), % 1.5 to 2.8
0 to 0.5
Sulfur (S), % 0
0 to 0.015
Titanium (Ti), % 0
0 to 0.75
Residuals, % 0
0 to 0.5