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ASTM A302 Alloy Steel vs. 6101A Aluminum

ASTM A302 alloy steel belongs to the iron alloys classification, while 6101A aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 A302 alloy steel and the bottom bar is 6101A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
68
Elongation at Break, % 20 to 23
11
Fatigue Strength, MPa 250 to 280
80
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 370 to 390
130
Tensile Strength: Ultimate (UTS), MPa 590 to 620
220
Tensile Strength: Yield (Proof), MPa 350 to 390
190

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 410
160
Melting Completion (Liquidus), °C 1460
640
Melting Onset (Solidus), °C 1420
630
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 39 to 51
200
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2 to 7.4
55
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.4
180

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 3.0
9.5
Density, g/cm3 7.8 to 7.9
2.7
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
8.3
Embodied Energy, MJ/kg 20 to 21
150
Embodied Water, L/kg 48 to 50
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
24
Resilience: Unit (Modulus of Resilience), kJ/m3 330 to 410
280
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
51
Strength to Weight: Axial, points 21 to 22
23
Strength to Weight: Bending, points 20 to 21
30
Thermal Diffusivity, mm2/s 10 to 14
84
Thermal Shock Resistance, points 17 to 18
10