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6081 Aluminum vs. R05255 Alloy

6081 aluminum belongs to the aluminum alloys classification, while R05255 alloy belongs to the otherwise unclassified metals. There are 20 material properties with values for both materials. Properties with values for just one material (10, 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 6081 aluminum and the bottom bar is R05255 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
190
Elongation at Break, % 9.0
20
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 26
70
Tensile Strength: Ultimate (UTS), MPa 310
540
Tensile Strength: Yield (Proof), MPa 270
450

Thermal Properties

Latent Heat of Fusion, J/g 410
140
Specific Heat Capacity, J/kg-K 900
140
Thermal Conductivity, W/m-K 180
59
Thermal Expansion, µm/m-K 23
6.6

Otherwise Unclassified Properties

Density, g/cm3 2.7
17
Embodied Water, L/kg 1180
630

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
100
Resilience: Unit (Modulus of Resilience), kJ/m3 540
530
Stiffness to Weight: Axial, points 14
6.3
Stiffness to Weight: Bending, points 50
11
Strength to Weight: Axial, points 32
9.1
Strength to Weight: Bending, points 37
8.9
Thermal Diffusivity, mm2/s 74
25
Thermal Shock Resistance, points 14
31

Alloy Composition

Aluminum (Al), % 96.3 to 98.6
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.1
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.5
0 to 0.010
Magnesium (Mg), % 0.6 to 1.0
0
Manganese (Mn), % 0.1 to 0.45
0
Molybdenum (Mo), % 0
0 to 0.020
Nickel (Ni), % 0
0 to 0.010
Niobium (Nb), % 0
0 to 0.5
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.015
Silicon (Si), % 0.7 to 1.1
0 to 0.0050
Tantalum (Ta), % 0
95.9 to 98
Titanium (Ti), % 0 to 0.15
0 to 0.010
Tungsten (W), % 0
2.0 to 3.5
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.15
0