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EN AC-46500 Aluminum vs. S31277 Stainless Steel

EN AC-46500 aluminum belongs to the aluminum alloys classification, while S31277 stainless steel belongs to the iron alloys. There are 25 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-46500 aluminum and the bottom bar is S31277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 74
210
Elongation at Break, % 1.0
45
Fatigue Strength, MPa 110
380
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
80
Tensile Strength: Ultimate (UTS), MPa 270
860
Tensile Strength: Yield (Proof), MPa 160
410

Thermal Properties

Latent Heat of Fusion, J/g 520
310
Maximum Temperature: Mechanical, °C 180
1100
Melting Completion (Liquidus), °C 610
1460
Melting Onset (Solidus), °C 520
1410
Specific Heat Capacity, J/kg-K 880
460
Thermal Expansion, µm/m-K 21
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
36
Density, g/cm3 2.9
8.1
Embodied Carbon, kg CO2/kg material 7.6
6.7
Embodied Energy, MJ/kg 140
90
Embodied Water, L/kg 1030
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
320
Resilience: Unit (Modulus of Resilience), kJ/m3 170
410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 49
24
Strength to Weight: Axial, points 26
29
Strength to Weight: Bending, points 32
25
Thermal Shock Resistance, points 12
19

Alloy Composition

Aluminum (Al), % 77.9 to 90
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0 to 0.15
20.5 to 23
Copper (Cu), % 2.0 to 4.0
0.5 to 1.5
Iron (Fe), % 0 to 1.3
35.5 to 46.2
Lead (Pb), % 0 to 0.35
0
Magnesium (Mg), % 0.050 to 0.55
0
Manganese (Mn), % 0 to 0.55
0 to 3.0
Molybdenum (Mo), % 0
6.5 to 8.0
Nickel (Ni), % 0 to 0.55
26 to 28
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 8.0 to 11
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Tin (Sn), % 0 to 0.15
0
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 0 to 3.0
0
Residuals, % 0 to 0.25
0