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ASTM A209 Steel vs. 705.0 Aluminum

ASTM A209 steel belongs to the iron alloys classification, while 705.0 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 A209 steel and the bottom bar is 705.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 150
62 to 65
Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 34
8.4 to 10
Fatigue Strength, MPa 180 to 200
63 to 98
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Tensile Strength: Ultimate (UTS), MPa 420 to 460
240 to 260
Tensile Strength: Yield (Proof), MPa 220 to 250
130

Thermal Properties

Latent Heat of Fusion, J/g 250
390
Maximum Temperature: Mechanical, °C 410
180
Melting Completion (Liquidus), °C 1470
640
Melting Onset (Solidus), °C 1420 to 1430
610
Specific Heat Capacity, J/kg-K 470
890
Thermal Conductivity, W/m-K 50
140
Thermal Expansion, µm/m-K 13
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
34
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1 to 8.2
110

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
9.5
Density, g/cm3 7.9
2.8
Embodied Carbon, kg CO2/kg material 1.5
8.4
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 47
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
18 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 170
120 to 130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
49
Strength to Weight: Axial, points 15 to 16
24 to 26
Strength to Weight: Bending, points 16 to 17
31 to 32
Thermal Diffusivity, mm2/s 13
55
Thermal Shock Resistance, points 12 to 14
11