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EN AC-21100 Aluminum vs. R05255 Alloy

EN AC-21100 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 EN AC-21100 aluminum and the bottom bar is R05255 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
190
Elongation at Break, % 6.2 to 7.3
20
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 27
70
Tensile Strength: Ultimate (UTS), MPa 340 to 350
540
Tensile Strength: Yield (Proof), MPa 210 to 240
450

Thermal Properties

Latent Heat of Fusion, J/g 390
140
Specific Heat Capacity, J/kg-K 880
140
Thermal Conductivity, W/m-K 130
59
Thermal Expansion, µm/m-K 23
6.6

Otherwise Unclassified Properties

Density, g/cm3 3.0
17
Embodied Water, L/kg 1150
630

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 21
100
Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
530
Stiffness to Weight: Axial, points 13
6.3
Stiffness to Weight: Bending, points 46
11
Strength to Weight: Axial, points 31 to 33
9.1
Strength to Weight: Bending, points 36 to 37
8.9
Thermal Diffusivity, mm2/s 48
25
Thermal Shock Resistance, points 15
31

Alloy Composition


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Aluminum (Al), % 93.4 to 95.7
0
Carbon (C), % 0
0 to 0.010
Copper (Cu), % 4.2 to 5.2
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.19
0 to 0.010
Manganese (Mn), % 0 to 0.55
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 0.18
0 to 0.0050
Tantalum (Ta), % 0
95.9 to 98
Titanium (Ti), % 0.15 to 0.3
0 to 0.010
Tungsten (W), % 0
2.0 to 3.5
Zinc (Zn), % 0 to 0.070
0
Residuals, % 0 to 0.1
0