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ASTM A27 Cast Steel vs. 6351 Aluminum

ASTM A27 cast steel belongs to the iron alloys classification, while 6351 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 6351 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 25 to 27
7.8 to 18
Fatigue Strength, MPa 170 to 230
79 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Tensile Strength: Ultimate (UTS), MPa 460 to 550
140 to 310
Tensile Strength: Yield (Proof), MPa 230 to 310
95 to 270

Thermal Properties

Latent Heat of Fusion, J/g 250
410
Maximum Temperature: Mechanical, °C 400
160
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
570
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 52
180
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0 to 7.1
46
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
150

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 1.4
8.3
Embodied Energy, MJ/kg 18
150
Embodied Water, L/kg 45 to 46
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 96 to 120
20 to 38
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 260
65 to 540
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 16 to 20
14 to 32
Strength to Weight: Bending, points 17 to 19
22 to 38
Thermal Diffusivity, mm2/s 14
72
Thermal Shock Resistance, points 15 to 18
6.1 to 14