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2025 Aluminum vs. ASTM A202 Steel

2025 aluminum belongs to the aluminum alloys classification, while ASTM A202 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 2025 aluminum and the bottom bar is ASTM A202 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 110
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 72
190
Elongation at Break, % 15
17 to 18
Fatigue Strength, MPa 130
240
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 240
360 to 410
Tensile Strength: Ultimate (UTS), MPa 400
590 to 670
Tensile Strength: Yield (Proof), MPa 260
350 to 360

Thermal Properties

Latent Heat of Fusion, J/g 400
260
Maximum Temperature: Mechanical, °C 190
410
Melting Completion (Liquidus), °C 640
1450
Melting Onset (Solidus), °C 520
1410
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 150
52
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.1
Density, g/cm3 3.0
7.8
Embodied Carbon, kg CO2/kg material 7.9
1.4
Embodied Energy, MJ/kg 150
19
Embodied Water, L/kg 1130
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 55
93 to 96
Resilience: Unit (Modulus of Resilience), kJ/m3 450
330 to 350
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
24
Strength to Weight: Axial, points 37
21 to 24
Strength to Weight: Bending, points 40
20 to 22
Thermal Diffusivity, mm2/s 58
14
Thermal Shock Resistance, points 18
17 to 20