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Ductile Cast Iron vs. AWS BNi-4

Ductile cast iron belongs to the iron alloys classification, while AWS BNi-4 belongs to the nickel alloys. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is ductile cast iron and the bottom bar is AWS BNi-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170 to 180
180
Poisson's Ratio 0.28 to 0.31
0.31
Shear Modulus, GPa 64 to 70
67
Tensile Strength: Ultimate (UTS), MPa 460 to 920
430

Thermal Properties

Latent Heat of Fusion, J/g 270
340
Melting Completion (Liquidus), °C 1160
1070
Melting Onset (Solidus), °C 1120
980
Specific Heat Capacity, J/kg-K 490
470
Thermal Expansion, µm/m-K 11
11

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
60
Density, g/cm3 7.1 to 7.5
8.5
Embodied Carbon, kg CO2/kg material 1.5
10
Embodied Energy, MJ/kg 21
140
Embodied Water, L/kg 43
220

Common Calculations

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
14
Strength to Weight: Bending, points 18 to 29
15
Thermal Shock Resistance, points 17 to 35
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
1.5 to 2.2
Carbon (C), % 3.0 to 3.5
0 to 0.060
Cobalt (Co), % 0
0 to 0.1
Iron (Fe), % 93.7 to 95.5
0 to 1.5
Nickel (Ni), % 0
91.4 to 95.5
Phosphorus (P), % 0 to 0.080
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 1.5 to 2.8
3.0 to 4.0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5