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ASTM A372 Grade C Steel vs. 3303 Aluminum

ASTM A372 grade C steel belongs to the iron alloys classification, while 3303 aluminum belongs to the aluminum alloys. There are 30 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 ASTM A372 grade C steel and the bottom bar is 3303 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
70
Elongation at Break, % 17
23
Fatigue Strength, MPa 290
43
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
26
Shear Strength, MPa 440
69
Tensile Strength: Ultimate (UTS), MPa 710
110
Tensile Strength: Yield (Proof), MPa 430
39

Thermal Properties

Latent Heat of Fusion, J/g 250
400
Maximum Temperature: Mechanical, °C 400
180
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
620
Specific Heat Capacity, J/kg-K 470
900
Thermal Conductivity, W/m-K 51
170
Thermal Expansion, µm/m-K 12
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
43
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
140

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
9.5
Density, g/cm3 7.8
2.8
Embodied Carbon, kg CO2/kg material 1.4
8.1
Embodied Energy, MJ/kg 19
150
Embodied Water, L/kg 46
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
20
Resilience: Unit (Modulus of Resilience), kJ/m3 500
11
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
49
Strength to Weight: Axial, points 25
11
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 14
67
Thermal Shock Resistance, points 22
4.8

Alloy Composition

Aluminum (Al), % 0
96.6 to 99
Carbon (C), % 0 to 0.48
0
Copper (Cu), % 0
0.050 to 0.2
Iron (Fe), % 97.5 to 99.85
0 to 0.7
Manganese (Mn), % 0 to 1.7
1.0 to 1.5
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0.15 to 0.35
0 to 0.6
Sulfur (S), % 0 to 0.010
0
Zinc (Zn), % 0
0 to 0.3
Residuals, % 0
0 to 0.15