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ASTM A732 Cast Steel vs. EN AC-51400 Aluminum

ASTM A732 cast steel belongs to the iron alloys classification, while EN AC-51400 aluminum belongs to the aluminum 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 ASTM A732 cast steel and the bottom bar is EN AC-51400 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 440
71
Elastic (Young's, Tensile) Modulus, GPa 190
67
Elongation at Break, % 4.0 to 25
3.4
Fatigue Strength, MPa 230 to 750
85
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 72 to 73
25
Tensile Strength: Ultimate (UTS), MPa 460 to 1470
190
Tensile Strength: Yield (Proof), MPa 310 to 1340
120

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
400
Maximum Temperature: Mechanical, °C 400 to 430
170
Melting Completion (Liquidus), °C 1440 to 1460
640
Melting Onset (Solidus), °C 1400 to 1420
600
Specific Heat Capacity, J/kg-K 470 to 480
910
Thermal Conductivity, W/m-K 39 to 50
110
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1 to 7.7
31
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.9
110

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0 to 3.8
9.5
Density, g/cm3 7.8 to 7.9
2.7
Embodied Carbon, kg CO2/kg material 1.4 to 1.7
9.1
Embodied Energy, MJ/kg 19 to 24
150
Embodied Water, L/kg 47 to 54
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 45 to 130
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 4770
110
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 16 to 52
20
Strength to Weight: Bending, points 17 to 37
28
Thermal Diffusivity, mm2/s 10 to 14
46
Thermal Shock Resistance, points 14 to 43
8.6