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ASTM A209 Steel vs. EN AC-21000 Aluminum

ASTM A209 steel belongs to the iron alloys classification, while EN AC-21000 aluminum belongs to the aluminum alloys. There are 30 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 A209 steel and the bottom bar is EN AC-21000 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 150
100
Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 34
6.7
Fatigue Strength, MPa 180 to 200
100
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Tensile Strength: Ultimate (UTS), MPa 420 to 460
340
Tensile Strength: Yield (Proof), MPa 220 to 250
240

Thermal Properties

Latent Heat of Fusion, J/g 250
390
Maximum Temperature: Mechanical, °C 410
170
Melting Completion (Liquidus), °C 1470
670
Melting Onset (Solidus), °C 1420 to 1430
550
Specific Heat Capacity, J/kg-K 470
880
Thermal Conductivity, W/m-K 50
130
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
34
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1 to 8.2
100

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4
11
Density, g/cm3 7.9
3.0
Embodied Carbon, kg CO2/kg material 1.5
8.0
Embodied Energy, MJ/kg 20
150
Embodied Water, L/kg 47
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
21
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 170
390
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
46
Strength to Weight: Axial, points 15 to 16
32
Strength to Weight: Bending, points 16 to 17
36
Thermal Diffusivity, mm2/s 13
49
Thermal Shock Resistance, points 12 to 14
15