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AWS BNi-4 vs. Austempered Cast Iron

AWS BNi-4 belongs to the nickel alloys classification, while austempered cast iron belongs to the iron alloys. There are 19 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

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

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
180
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 67
62 to 69
Tensile Strength: Ultimate (UTS), MPa 430
860 to 1800

Thermal Properties

Latent Heat of Fusion, J/g 340
280
Melting Completion (Liquidus), °C 1070
1380
Melting Onset (Solidus), °C 980
1340
Specific Heat Capacity, J/kg-K 470
490
Thermal Expansion, µm/m-K 11
13

Otherwise Unclassified Properties

Base Metal Price, % relative 60
2.9
Density, g/cm3 8.5
7.5
Embodied Carbon, kg CO2/kg material 10
1.8
Embodied Energy, MJ/kg 140
25
Embodied Water, L/kg 220
48

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 14
32 to 66
Strength to Weight: Bending, points 15
27 to 44
Thermal Shock Resistance, points 16
25 to 53

Alloy Composition

Aluminum (Al), % 0 to 0.050
0 to 0.050
Arsenic (As), % 0
0 to 0.020
Boron (B), % 1.5 to 2.2
0
Carbon (C), % 0 to 0.060
3.4 to 3.8
Chromium (Cr), % 0
0 to 0.1
Cobalt (Co), % 0 to 0.1
0
Copper (Cu), % 0
0 to 0.8
Iron (Fe), % 0 to 1.5
89.6 to 94
Magnesium (Mg), % 0
0 to 0.040
Manganese (Mn), % 0
0.3 to 0.4
Molybdenum (Mo), % 0
0 to 0.3
Nickel (Ni), % 91.4 to 95.5
0 to 2.0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Selenium (Se), % 0 to 0.0050
0 to 0.030
Silicon (Si), % 3.0 to 4.0
2.3 to 2.7
Sulfur (S), % 0 to 0.020
0 to 0.020
Tin (Sn), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.050
0
Vanadium (V), % 0
0 to 0.1
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0 to 0.5
0