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Austempered Cast Iron vs. AWS ENiCu-7

Austempered cast iron belongs to the iron alloys classification, while AWS ENiCu-7 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 ENiCu-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
160
Elongation at Break, % 1.1 to 13
34
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 62 to 69
62
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
550

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1380
1270
Melting Onset (Solidus), °C 1340
1230
Specific Heat Capacity, J/kg-K 490
430
Thermal Conductivity, W/m-K 42
21
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
50
Density, g/cm3 7.5
8.7
Embodied Carbon, kg CO2/kg material 1.8
8.0
Embodied Energy, MJ/kg 25
110
Embodied Water, L/kg 48
250

Common Calculations

Stiffness to Weight: Axial, points 13
10
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 32 to 66
17
Strength to Weight: Bending, points 27 to 44
17
Thermal Diffusivity, mm2/s 11
5.5
Thermal Shock Resistance, points 25 to 53
18

Alloy Composition

Aluminum (Al), % 0 to 0.050
0 to 0.75
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
20.6 to 38
Iron (Fe), % 89.6 to 94
0 to 2.5
Magnesium (Mg), % 0 to 0.040
0
Manganese (Mn), % 0.3 to 0.4
0 to 4.0
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 2.0
62 to 69
Phosphorus (P), % 0 to 0.040
0 to 0.020
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
0 to 1.5
Sulfur (S), % 0 to 0.020
0 to 0.015
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 1.0
Vanadium (V), % 0 to 0.1
0
Residuals, % 0
0 to 0.5