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Austempered Cast Iron vs. EN AC-47000 Aluminum

Austempered cast iron belongs to the iron alloys classification, while EN AC-47000 aluminum belongs to the aluminum alloys. There are 26 material properties with values for both materials. Properties with values for just one material (4, 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-47000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270 to 490
60
Elastic (Young's, Tensile) Modulus, GPa 180
73
Elongation at Break, % 1.1 to 13
1.7
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 62 to 69
27
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
180
Tensile Strength: Yield (Proof), MPa 560 to 1460
97

Thermal Properties

Latent Heat of Fusion, J/g 280
570
Melting Completion (Liquidus), °C 1380
590
Melting Onset (Solidus), °C 1340
570
Specific Heat Capacity, J/kg-K 490
900
Thermal Conductivity, W/m-K 42
130
Thermal Expansion, µm/m-K 13
21

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
9.5
Density, g/cm3 7.5
2.6
Embodied Carbon, kg CO2/kg material 1.8
7.7
Embodied Energy, MJ/kg 25
140
Embodied Water, L/kg 48
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 95
2.5
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 3970
65
Stiffness to Weight: Axial, points 13
16
Stiffness to Weight: Bending, points 25
54
Strength to Weight: Axial, points 32 to 66
19
Strength to Weight: Bending, points 27 to 44
27
Thermal Diffusivity, mm2/s 11
55
Thermal Shock Resistance, points 25 to 53
8.3

Alloy Composition

Aluminum (Al), % 0 to 0.050
82.1 to 89.5
Arsenic (As), % 0 to 0.020
0
Carbon (C), % 3.4 to 3.8
0
Chromium (Cr), % 0 to 0.1
0 to 0.1
Copper (Cu), % 0 to 0.8
0 to 1.0
Iron (Fe), % 89.6 to 94
0 to 0.8
Lead (Pb), % 0
0 to 0.2
Magnesium (Mg), % 0 to 0.040
0 to 0.35
Manganese (Mn), % 0.3 to 0.4
0.050 to 0.55
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 2.0
0 to 0.3
Phosphorus (P), % 0 to 0.040
0
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
10.5 to 13.5
Sulfur (S), % 0 to 0.020
0
Tin (Sn), % 0 to 0.020
0 to 0.1
Titanium (Ti), % 0
0 to 0.2
Vanadium (V), % 0 to 0.1
0
Zinc (Zn), % 0
0 to 0.55
Residuals, % 0
0 to 0.25