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EN AC-21100 Aluminum vs. Grey Cast Iron

EN AC-21100 aluminum belongs to the aluminum alloys classification, while grey cast iron belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 EN AC-21100 aluminum and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 100 to 110
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 71
180
Elongation at Break, % 6.2 to 7.3
9.6
Fatigue Strength, MPa 79 to 87
69 to 170
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
69
Tensile Strength: Ultimate (UTS), MPa 340 to 350
160 to 450
Tensile Strength: Yield (Proof), MPa 210 to 240
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 390
280
Melting Completion (Liquidus), °C 670
1380
Melting Onset (Solidus), °C 550
1180
Specific Heat Capacity, J/kg-K 880
490
Thermal Conductivity, W/m-K 130
46
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 100
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 11
1.9
Density, g/cm3 3.0
7.5
Embodied Carbon, kg CO2/kg material 8.0
1.5
Embodied Energy, MJ/kg 150
21
Embodied Water, L/kg 1150
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
27 to 240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 31 to 33
5.8 to 17
Strength to Weight: Bending, points 36 to 37
8.7 to 17
Thermal Diffusivity, mm2/s 48
13
Thermal Shock Resistance, points 15
6.0 to 17

Alloy Composition

Aluminum (Al), % 93.4 to 95.7
0
Carbon (C), % 0
3.1 to 3.4
Copper (Cu), % 4.2 to 5.2
0
Iron (Fe), % 0 to 0.19
92.1 to 93.9
Manganese (Mn), % 0 to 0.55
0.5 to 0.7
Phosphorus (P), % 0
0 to 0.9
Silicon (Si), % 0 to 0.18
2.5 to 2.8
Sulfur (S), % 0
0 to 0.15
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0