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ASTM A225 Steel vs. 380.0 Aluminum

ASTM A225 steel belongs to the iron alloys classification, while 380.0 aluminum belongs to the aluminum 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 ASTM A225 steel and the bottom bar is 380.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 250
80
Elastic (Young's, Tensile) Modulus, GPa 190
74
Elongation at Break, % 21 to 23
3.0
Fatigue Strength, MPa 330 to 390
140
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
28
Shear Strength, MPa 390 to 520
190
Tensile Strength: Ultimate (UTS), MPa 620 to 830
320
Tensile Strength: Yield (Proof), MPa 460 to 550
160

Thermal Properties

Latent Heat of Fusion, J/g 250
510
Maximum Temperature: Mechanical, °C 400
170
Melting Completion (Liquidus), °C 1460
590
Melting Onset (Solidus), °C 1420
540
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 52
100
Thermal Expansion, µm/m-K 13
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
27
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
83

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
10
Density, g/cm3 7.8
2.9
Embodied Carbon, kg CO2/kg material 1.8
7.5
Embodied Energy, MJ/kg 24 to 25
140
Embodied Water, L/kg 48
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 170
8.0
Resilience: Unit (Modulus of Resilience), kJ/m3 580 to 820
170
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
48
Strength to Weight: Axial, points 22 to 29
31
Strength to Weight: Bending, points 21 to 25
36
Thermal Diffusivity, mm2/s 14
40
Thermal Shock Resistance, points 18 to 24
14