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C443.0 Aluminum vs. S31730 Stainless Steel

C443.0 aluminum belongs to the aluminum alloys classification, while S31730 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, 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 C443.0 aluminum and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 65
180
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 9.0
40
Fatigue Strength, MPa 120
170
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Shear Strength, MPa 130
370
Tensile Strength: Ultimate (UTS), MPa 230
540
Tensile Strength: Yield (Proof), MPa 100
200

Thermal Properties

Latent Heat of Fusion, J/g 470
290
Maximum Temperature: Mechanical, °C 170
990
Melting Completion (Liquidus), °C 630
1430
Melting Onset (Solidus), °C 600
1390
Specific Heat Capacity, J/kg-K 900
470
Thermal Expansion, µm/m-K 22
16

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
24
Density, g/cm3 2.7
8.0
Embodied Carbon, kg CO2/kg material 7.9
4.6
Embodied Energy, MJ/kg 150
63
Embodied Water, L/kg 1120
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17
170
Resilience: Unit (Modulus of Resilience), kJ/m3 70
99
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 51
24
Strength to Weight: Axial, points 24
19
Strength to Weight: Bending, points 31
18
Thermal Shock Resistance, points 10
12

Alloy Composition

Aluminum (Al), % 89.6 to 95.5
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0 to 0.6
4.0 to 5.0
Iron (Fe), % 0 to 2.0
52.4 to 61
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.35
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0 to 0.5
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 4.5 to 6.0
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Tin (Sn), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.5
0
Residuals, % 0 to 0.25
0