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Austempered Cast Iron vs. AWS ENi-1

Austempered cast iron belongs to the iron alloys classification, while AWS ENi-1 belongs to the nickel alloys. There are 22 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is austempered cast iron and the bottom bar is AWS ENi-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
180
Elongation at Break, % 1.1 to 13
22
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 62 to 69
69
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
470

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Melting Completion (Liquidus), °C 1380
1360
Melting Onset (Solidus), °C 1340
1310
Specific Heat Capacity, J/kg-K 490
450
Thermal Conductivity, W/m-K 42
73
Thermal Expansion, µm/m-K 13
11

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
60
Density, g/cm3 7.5
8.7
Embodied Carbon, kg CO2/kg material 1.8
11
Embodied Energy, MJ/kg 25
150
Embodied Water, L/kg 48
230

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 32 to 66
15
Strength to Weight: Bending, points 27 to 44
15
Thermal Diffusivity, mm2/s 11
19
Thermal Shock Resistance, points 25 to 53
17

Alloy Composition

Aluminum (Al), % 0 to 0.050
0 to 1.0
Arsenic (As), % 0 to 0.020
0
Carbon (C), % 3.4 to 3.8
0 to 0.1
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.8
0 to 0.25
Iron (Fe), % 89.6 to 94
0 to 0.75
Magnesium (Mg), % 0 to 0.040
0
Manganese (Mn), % 0.3 to 0.4
0 to 0.75
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 2.0
92 to 99
Phosphorus (P), % 0 to 0.040
0 to 0.030
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
0 to 1.3
Sulfur (S), % 0 to 0.020
0 to 0.020
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0
1.0 to 4.0
Vanadium (V), % 0 to 0.1
0
Residuals, % 0
0 to 0.5