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2095 Aluminum vs. S39277 Stainless Steel

2095 aluminum belongs to the aluminum alloys classification, while S39277 stainless steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, 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 2095 aluminum and the bottom bar is S39277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
200
Elongation at Break, % 8.5
28
Fatigue Strength, MPa 200
480
Poisson's Ratio 0.33
0.27
Shear Modulus, GPa 26
80
Shear Strength, MPa 410
600
Tensile Strength: Ultimate (UTS), MPa 700
930
Tensile Strength: Yield (Proof), MPa 610
660

Thermal Properties

Latent Heat of Fusion, J/g 390
300
Maximum Temperature: Mechanical, °C 210
1100
Melting Completion (Liquidus), °C 660
1460
Melting Onset (Solidus), °C 540
1410
Specific Heat Capacity, J/kg-K 910
470
Thermal Conductivity, W/m-K 130
16
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 110
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 31
23
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.6
4.2
Embodied Energy, MJ/kg 160
59
Embodied Water, L/kg 1470
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
240
Resilience: Unit (Modulus of Resilience), kJ/m3 2640
1070
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 65
33
Strength to Weight: Bending, points 59
27
Thermal Diffusivity, mm2/s 49
4.2
Thermal Shock Resistance, points 31
26

Alloy Composition

Aluminum (Al), % 91.3 to 94.9
0
Carbon (C), % 0
0 to 0.025
Chromium (Cr), % 0
24 to 26
Copper (Cu), % 3.9 to 4.6
1.2 to 2.0
Iron (Fe), % 0 to 0.15
56.8 to 64.3
Lithium (Li), % 0.7 to 1.5
0
Magnesium (Mg), % 0.25 to 0.8
0
Manganese (Mn), % 0 to 0.25
0 to 0.8
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 0
6.5 to 8.0
Nitrogen (N), % 0
0.23 to 0.33
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 0.12
0 to 0.8
Silver (Ag), % 0.25 to 0.6
0
Sulfur (S), % 0
0 to 0.0020
Titanium (Ti), % 0 to 0.1
0
Tungsten (W), % 0
0.8 to 1.2
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0.040 to 0.18
0
Residuals, % 0 to 0.15
0