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5657 Aluminum vs. ASTM A204 Steel

5657 aluminum belongs to the aluminum alloys classification, while ASTM A204 steel belongs to the iron alloys. 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 5657 aluminum and the bottom bar is ASTM A204 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 40 to 50
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 68
190
Elongation at Break, % 6.6 to 15
18 to 22
Fatigue Strength, MPa 74 to 88
200 to 220
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 92 to 110
330 to 360
Tensile Strength: Ultimate (UTS), MPa 150 to 200
520 to 590
Tensile Strength: Yield (Proof), MPa 140 to 170
290 to 330

Thermal Properties

Latent Heat of Fusion, J/g 400
250
Maximum Temperature: Mechanical, °C 180
410
Melting Completion (Liquidus), °C 660
1470
Melting Onset (Solidus), °C 640
1420 to 1430
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 210
52
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 54
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 180
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.4
Density, g/cm3 2.7
7.9
Embodied Carbon, kg CO2/kg material 8.4
1.5
Embodied Energy, MJ/kg 160
20
Embodied Water, L/kg 1200
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.7 to 27
90 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 200
220 to 290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 15 to 20
18 to 21
Strength to Weight: Bending, points 23 to 28
18 to 20
Thermal Diffusivity, mm2/s 84
14
Thermal Shock Resistance, points 6.7 to 8.6
15 to 17