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ASTM A27 Cast Steel vs. EN AC-21100 Aluminum

ASTM A27 cast steel belongs to the iron alloys classification, while EN AC-21100 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 ASTM A27 cast steel and the bottom bar is EN AC-21100 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 25 to 27
6.2 to 7.3
Fatigue Strength, MPa 170 to 230
79 to 87
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Tensile Strength: Ultimate (UTS), MPa 460 to 550
340 to 350
Tensile Strength: Yield (Proof), MPa 230 to 310
210 to 240

Thermal Properties

Latent Heat of Fusion, J/g 250
390
Maximum Temperature: Mechanical, °C 400
170
Melting Completion (Liquidus), °C 1460
670
Melting Onset (Solidus), °C 1420
550
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 52
130
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0 to 7.1
34
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
100

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
11
Density, g/cm3 7.8
3.0
Embodied Carbon, kg CO2/kg material 1.4
8.0
Embodied Energy, MJ/kg 18
150
Embodied Water, L/kg 45 to 46
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 96 to 120
19 to 21
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 260
300 to 400
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 16 to 20
31 to 33
Strength to Weight: Bending, points 17 to 19
36 to 37
Thermal Diffusivity, mm2/s 14
48
Thermal Shock Resistance, points 15 to 18
15