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ASTM A204 Steel vs. 6101B Aluminum

ASTM A204 steel belongs to the iron alloys classification, while 6101B 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 A204 steel and the bottom bar is 6101B aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
68
Elongation at Break, % 18 to 22
9.1 to 13
Fatigue Strength, MPa 200 to 220
62 to 70
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 330 to 360
120 to 150
Tensile Strength: Ultimate (UTS), MPa 520 to 590
190 to 250
Tensile Strength: Yield (Proof), MPa 290 to 330
140 to 180

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 410
160
Melting Completion (Liquidus), °C 1470
640
Melting Onset (Solidus), °C 1420 to 1430
630
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 52
210
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
57
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
190

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
9.5
Density, g/cm3 7.9
2.7
Embodied Carbon, kg CO2/kg material 1.5
8.3
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 47
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 90 to 95
20 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 220 to 290
140 to 240
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 18 to 21
20 to 25
Strength to Weight: Bending, points 18 to 20
27 to 32
Thermal Diffusivity, mm2/s 14
87
Thermal Shock Resistance, points 15 to 17
8.5 to 11