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3105 Aluminum vs. Austempered Cast Iron

3105 aluminum belongs to the aluminum alloys classification, while austempered cast iron belongs to the iron alloys. There are 26 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 3105 aluminum and the bottom bar is austempered cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 29 to 67
270 to 490
Elastic (Young's, Tensile) Modulus, GPa 69
180
Elongation at Break, % 1.1 to 20
1.1 to 13
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
62 to 69
Tensile Strength: Ultimate (UTS), MPa 120 to 240
860 to 1800
Tensile Strength: Yield (Proof), MPa 46 to 220
560 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 400
280
Melting Completion (Liquidus), °C 660
1380
Melting Onset (Solidus), °C 640
1340
Specific Heat Capacity, J/kg-K 900
490
Thermal Conductivity, W/m-K 170
42
Thermal Expansion, µm/m-K 24
13

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.9
Density, g/cm3 2.8
7.5
Embodied Carbon, kg CO2/kg material 8.2
1.8
Embodied Energy, MJ/kg 150
25
Embodied Water, L/kg 1180
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 19
19 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 15 to 340
880 to 3970
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 12 to 24
32 to 66
Strength to Weight: Bending, points 20 to 31
27 to 44
Thermal Diffusivity, mm2/s 68
11
Thermal Shock Resistance, points 5.2 to 11
25 to 53

Alloy Composition

Aluminum (Al), % 96 to 99.5
0 to 0.050
Arsenic (As), % 0
0 to 0.020
Carbon (C), % 0
3.4 to 3.8
Chromium (Cr), % 0 to 0.2
0 to 0.1
Copper (Cu), % 0 to 0.3
0 to 0.8
Iron (Fe), % 0 to 0.7
89.6 to 94
Magnesium (Mg), % 0.2 to 0.8
0 to 0.040
Manganese (Mn), % 0.3 to 0.8
0.3 to 0.4
Molybdenum (Mo), % 0
0 to 0.3
Nickel (Ni), % 0
0 to 2.0
Phosphorus (P), % 0
0 to 0.040
Selenium (Se), % 0
0 to 0.030
Silicon (Si), % 0 to 0.6
2.3 to 2.7
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.1
0
Vanadium (V), % 0
0 to 0.1
Zinc (Zn), % 0 to 0.4
0
Residuals, % 0 to 0.15
0