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EN AC-46400 Aluminum vs. ASTM A732 Cast Steel

EN AC-46400 aluminum belongs to the aluminum alloys classification, while ASTM A732 cast steel belongs to the iron alloys. 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-46400 aluminum and the bottom bar is ASTM A732 cast steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 77 to 120
140 to 440
Elastic (Young's, Tensile) Modulus, GPa 72
190
Elongation at Break, % 1.1 to 1.7
4.0 to 25
Fatigue Strength, MPa 75 to 85
230 to 750
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
72 to 73
Tensile Strength: Ultimate (UTS), MPa 170 to 310
460 to 1470
Tensile Strength: Yield (Proof), MPa 110 to 270
310 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 520
250 to 260
Maximum Temperature: Mechanical, °C 170
400 to 430
Melting Completion (Liquidus), °C 610
1440 to 1460
Melting Onset (Solidus), °C 570
1400 to 1420
Specific Heat Capacity, J/kg-K 890
470 to 480
Thermal Conductivity, W/m-K 130
39 to 50
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
7.1 to 7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 110
8.2 to 8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.0 to 3.8
Density, g/cm3 2.7
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 7.8
1.4 to 1.7
Embodied Energy, MJ/kg 150
19 to 24
Embodied Water, L/kg 1070
47 to 54

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 1.7 to 4.9
45 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 82 to 500
260 to 4770
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 52
24
Strength to Weight: Axial, points 18 to 32
16 to 52
Strength to Weight: Bending, points 26 to 38
17 to 37
Thermal Diffusivity, mm2/s 55
10 to 14
Thermal Shock Resistance, points 7.8 to 14
14 to 43