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Austempered Cast Iron vs. EN AC-71100 Aluminum

Austempered cast iron belongs to the iron alloys classification, while EN AC-71100 aluminum belongs to the aluminum alloys. There are 24 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is austempered cast iron and the bottom bar is EN AC-71100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270 to 490
110
Elastic (Young's, Tensile) Modulus, GPa 180
72
Elongation at Break, % 1.1 to 13
1.1
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 62 to 69
27
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
260
Tensile Strength: Yield (Proof), MPa 560 to 1460
230

Thermal Properties

Latent Heat of Fusion, J/g 280
490
Melting Completion (Liquidus), °C 1380
580
Melting Onset (Solidus), °C 1340
520
Specific Heat Capacity, J/kg-K 490
860
Thermal Expansion, µm/m-K 13
22

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
9.5
Density, g/cm3 7.5
2.9
Embodied Carbon, kg CO2/kg material 1.8
7.4
Embodied Energy, MJ/kg 25
140
Embodied Water, L/kg 48
1010

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 95
2.8
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 3970
360
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
47
Strength to Weight: Axial, points 32 to 66
25
Strength to Weight: Bending, points 27 to 44
31
Thermal Shock Resistance, points 25 to 53
12

Alloy Composition

Aluminum (Al), % 0 to 0.050
78.7 to 83.3
Arsenic (As), % 0 to 0.020
0
Carbon (C), % 3.4 to 3.8
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.8
0 to 0.1
Iron (Fe), % 89.6 to 94
0 to 0.3
Magnesium (Mg), % 0 to 0.040
0.2 to 0.5
Manganese (Mn), % 0.3 to 0.4
0 to 0.15
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 2.0
0
Phosphorus (P), % 0 to 0.040
0
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
7.5 to 9.5
Sulfur (S), % 0 to 0.020
0
Tin (Sn), % 0 to 0.020
0
Titanium (Ti), % 0
0 to 0.15
Vanadium (V), % 0 to 0.1
0
Zinc (Zn), % 0
9.0 to 10.5
Residuals, % 0
0 to 0.15