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7049 Aluminum vs. R05255 Alloy

7049 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 (11, 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 7049 aluminum and the bottom bar is R05255 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 6.2 to 7.0
20
Poisson's Ratio 0.32
0.34
Shear Modulus, GPa 27
70
Tensile Strength: Ultimate (UTS), MPa 510 to 530
540
Tensile Strength: Yield (Proof), MPa 420 to 450
450

Thermal Properties

Latent Heat of Fusion, J/g 370
140
Specific Heat Capacity, J/kg-K 860
140
Thermal Conductivity, W/m-K 130
59
Thermal Expansion, µm/m-K 23
6.6

Otherwise Unclassified Properties

Density, g/cm3 3.1
17
Embodied Water, L/kg 1110
630

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
100
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
530
Stiffness to Weight: Axial, points 13
6.3
Stiffness to Weight: Bending, points 45
11
Strength to Weight: Axial, points 46 to 47
9.1
Strength to Weight: Bending, points 46 to 47
8.9
Thermal Diffusivity, mm2/s 51
25
Thermal Shock Resistance, points 22 to 23
31

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0
Carbon (C), % 0
0 to 0.010
Chromium (Cr), % 0.1 to 0.22
0
Copper (Cu), % 1.2 to 1.9
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.35
0 to 0.010
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
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 to 0.25
0 to 0.0050
Tantalum (Ta), % 0
95.9 to 98
Titanium (Ti), % 0 to 0.1
0 to 0.010
Tungsten (W), % 0
2.0 to 3.5
Zinc (Zn), % 7.2 to 8.2
0
Residuals, % 0 to 0.15
0