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S31277 Stainless Steel vs. EN AC-45300 Aluminum

S31277 stainless steel belongs to the iron alloys classification, while EN AC-45300 aluminum belongs to the aluminum 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 S31277 stainless steel and the bottom bar is EN AC-45300 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
71
Elongation at Break, % 45
1.0 to 2.8
Fatigue Strength, MPa 380
59 to 72
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 80
27
Tensile Strength: Ultimate (UTS), MPa 860
220 to 290
Tensile Strength: Yield (Proof), MPa 410
150 to 230

Thermal Properties

Latent Heat of Fusion, J/g 310
470
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1460
630
Melting Onset (Solidus), °C 1410
590
Specific Heat Capacity, J/kg-K 460
890
Thermal Expansion, µm/m-K 16
22

Otherwise Unclassified Properties

Base Metal Price, % relative 36
9.5
Density, g/cm3 8.1
2.7
Embodied Carbon, kg CO2/kg material 6.7
8.0
Embodied Energy, MJ/kg 90
150
Embodied Water, L/kg 220
1120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
2.7 to 5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 410
160 to 390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
50
Strength to Weight: Axial, points 29
23 to 29
Strength to Weight: Bending, points 25
30 to 35
Thermal Shock Resistance, points 19
10 to 13

Alloy Composition


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Aluminum (Al), % 0
90.2 to 94.2
Carbon (C), % 0 to 0.020
0
Chromium (Cr), % 20.5 to 23
0
Copper (Cu), % 0.5 to 1.5
1.0 to 1.5
Iron (Fe), % 35.5 to 46.2
0 to 0.65
Lead (Pb), % 0
0 to 0.15
Magnesium (Mg), % 0
0.35 to 0.65
Manganese (Mn), % 0 to 3.0
0 to 0.55
Molybdenum (Mo), % 6.5 to 8.0
0
Nickel (Ni), % 26 to 28
0 to 0.25
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
4.5 to 5.5
Sulfur (S), % 0 to 0.010
0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0
0 to 0.15
Residuals, % 0
0 to 0.15