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AZ91D Magnesium vs. R04295 Alloy

AZ91D magnesium belongs to the magnesium alloys classification, while R04295 alloy belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (16, 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 AZ91D magnesium and the bottom bar is R04295 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 2.3 to 4.5
22
Poisson's Ratio 0.29
0.38
Shear Modulus, GPa 18
37
Tensile Strength: Ultimate (UTS), MPa 160 to 220
410
Tensile Strength: Yield (Proof), MPa 80 to 130
300

Thermal Properties

Latent Heat of Fusion, J/g 350
300
Specific Heat Capacity, J/kg-K 990
260
Thermal Expansion, µm/m-K 27
7.2

Otherwise Unclassified Properties

Density, g/cm3 1.7
9.0
Embodied Water, L/kg 990
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
84
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
430
Stiffness to Weight: Axial, points 15
6.3
Stiffness to Weight: Bending, points 69
17
Strength to Weight: Axial, points 26 to 34
13
Strength to Weight: Bending, points 38 to 46
14
Thermal Shock Resistance, points 9.5 to 13
40

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0
Carbon (C), % 0
0 to 0.015
Copper (Cu), % 0 to 0.030
0
Hafnium (Hf), % 0
9.0 to 11
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.0050
0
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0
Nickel (Ni), % 0 to 0.0020
0
Niobium (Nb), % 0
85.9 to 90.3
Nitrogen (N), % 0
0 to 0.010
Oxygen (O), % 0
0 to 0.025
Silicon (Si), % 0 to 0.1
0
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
0.7 to 1.3
Tungsten (W), % 0
0 to 0.5
Zinc (Zn), % 0.35 to 1.0
0
Zirconium (Zr), % 0
0 to 0.7