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Austempered Cast Iron vs. AWS E318

Both austempered cast iron and AWS E318 are iron alloys. They have 66% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is austempered cast iron and the bottom bar is AWS E318.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 1.1 to 13
29
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 62 to 69
78
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
620

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Melting Completion (Liquidus), °C 1380
1440
Melting Onset (Solidus), °C 1340
1400
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 42
15
Thermal Expansion, µm/m-K 13
14

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
23
Density, g/cm3 7.5
7.9
Embodied Carbon, kg CO2/kg material 1.8
4.4
Embodied Energy, MJ/kg 25
62
Embodied Water, L/kg 48
160

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 66
22
Strength to Weight: Bending, points 27 to 44
20
Thermal Diffusivity, mm2/s 11
4.0
Thermal Shock Resistance, points 25 to 53
16

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Arsenic (As), % 0 to 0.020
0
Carbon (C), % 3.4 to 3.8
0 to 0.080
Chromium (Cr), % 0 to 0.1
17 to 20
Copper (Cu), % 0 to 0.8
0 to 0.75
Iron (Fe), % 89.6 to 94
57.6 to 69.5
Magnesium (Mg), % 0 to 0.040
0
Manganese (Mn), % 0.3 to 0.4
0.5 to 2.5
Molybdenum (Mo), % 0 to 0.3
2.0 to 3.0
Nickel (Ni), % 0 to 2.0
11 to 14
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030
Tin (Sn), % 0 to 0.020
0
Vanadium (V), % 0 to 0.1
0