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380.0 Aluminum vs. S31277 Stainless Steel

380.0 aluminum belongs to the aluminum alloys classification, while S31277 stainless steel belongs to the iron alloys. There are 26 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 380.0 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, % 3.0
45
Fatigue Strength, MPa 140
380
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
80
Shear Strength, MPa 190
600
Tensile Strength: Ultimate (UTS), MPa 320
860
Tensile Strength: Yield (Proof), MPa 160
410

Thermal Properties

Latent Heat of Fusion, J/g 510
310
Maximum Temperature: Mechanical, °C 170
1100
Melting Completion (Liquidus), °C 590
1460
Melting Onset (Solidus), °C 540
1410
Specific Heat Capacity, J/kg-K 870
460
Thermal Expansion, µm/m-K 22
16

Otherwise Unclassified Properties

Base Metal Price, % relative 10
36
Density, g/cm3 2.9
8.1
Embodied Carbon, kg CO2/kg material 7.5
6.7
Embodied Energy, MJ/kg 140
90
Embodied Water, L/kg 1040
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.0
320
Resilience: Unit (Modulus of Resilience), kJ/m3 170
410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 48
24
Strength to Weight: Axial, points 31
29
Strength to Weight: Bending, points 36
25
Thermal Shock Resistance, points 14
19

Alloy Composition

Aluminum (Al), % 79.6 to 89.5
0
Carbon (C), % 0
0 to 0.020
Chromium (Cr), % 0
20.5 to 23
Copper (Cu), % 3.0 to 4.0
0.5 to 1.5
Iron (Fe), % 0 to 2.0
35.5 to 46.2
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.5
0 to 3.0
Molybdenum (Mo), % 0
6.5 to 8.0
Nickel (Ni), % 0 to 0.5
26 to 28
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 7.5 to 9.5
0 to 0.5
Sulfur (S), % 0
0 to 0.010
Tin (Sn), % 0 to 0.35
0
Zinc (Zn), % 0 to 3.0
0
Residuals, % 0 to 0.5
0