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EN AC-44400 Aluminum vs. S31730 Stainless Steel

EN AC-44400 aluminum belongs to the aluminum alloys classification, while S31730 stainless steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, 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 EN AC-44400 aluminum and the bottom bar is S31730 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 61
180
Elastic (Young's, Tensile) Modulus, GPa 71
200
Elongation at Break, % 4.1
40
Fatigue Strength, MPa 79
170
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 27
77
Tensile Strength: Ultimate (UTS), MPa 210
540
Tensile Strength: Yield (Proof), MPa 110
200

Thermal Properties

Latent Heat of Fusion, J/g 540
290
Maximum Temperature: Mechanical, °C 170
990
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 590
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 2.6
8.0
Embodied Carbon, kg CO2/kg material 7.8
4.6
Embodied Energy, MJ/kg 150
63
Embodied Water, L/kg 1080
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.3
170
Resilience: Unit (Modulus of Resilience), kJ/m3 85
99
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 54
24
Strength to Weight: Axial, points 23
19
Strength to Weight: Bending, points 31
18
Thermal Shock Resistance, points 9.8
12

Alloy Composition

Aluminum (Al), % 87.1 to 92
0
Carbon (C), % 0
0 to 0.030
Chromium (Cr), % 0
17 to 19
Copper (Cu), % 0 to 0.1
4.0 to 5.0
Iron (Fe), % 0 to 0.65
52.4 to 61
Lead (Pb), % 0 to 0.050
0
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 2.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0 to 0.050
15 to 16.5
Nitrogen (N), % 0
0 to 0.045
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 8.0 to 11
0 to 1.0
Sulfur (S), % 0
0 to 0.010
Tin (Sn), % 0 to 0.050
0
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.15
0
Residuals, % 0 to 0.15
0