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B443.0 Aluminum vs. ASTM A372 Grade G Steel

B443.0 aluminum belongs to the aluminum alloys classification, while ASTM A372 grade G steel belongs to the iron alloys. There are 31 material properties with values for both materials. Properties with values for just one material (1, 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 B443.0 aluminum and the bottom bar is ASTM A372 grade G steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 43
200 to 280
Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 4.9
20 to 22
Fatigue Strength, MPa 55
310 to 380
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 110
410 to 570
Tensile Strength: Ultimate (UTS), MPa 150
650 to 910
Tensile Strength: Yield (Proof), MPa 50
430 to 550

Thermal Properties

Latent Heat of Fusion, J/g 470
250
Maximum Temperature: Mechanical, °C 170
410
Melting Completion (Liquidus), °C 620
1460
Melting Onset (Solidus), °C 600
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 150
46
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 130
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.2
Density, g/cm3 2.7
7.8
Embodied Carbon, kg CO2/kg material 8.0
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1130
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
130 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 18
500 to 810
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 52
24
Strength to Weight: Axial, points 15
23 to 32
Strength to Weight: Bending, points 23
21 to 27
Thermal Diffusivity, mm2/s 61
13
Thermal Shock Resistance, points 6.8
19 to 27

Alloy Composition

Aluminum (Al), % 91.9 to 95.5
0
Carbon (C), % 0
0.25 to 0.35
Chromium (Cr), % 0
0.4 to 0.65
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 0 to 0.8
97.4 to 98.4
Magnesium (Mg), % 0 to 0.050
0
Manganese (Mn), % 0 to 0.35
0.7 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 4.5 to 6.0
0.15 to 0.35
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 0.35
0
Residuals, % 0 to 0.15
0