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AWS BNi-7 vs. AZ63A Magnesium

AWS BNi-7 belongs to the nickel alloys classification, while AZ63A magnesium belongs to the magnesium alloys. There are 19 material properties with values for both materials. Properties with values for just one material (13, 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 AWS BNi-7 and the bottom bar is AZ63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170
46
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 67
18
Tensile Strength: Ultimate (UTS), MPa 550
190 to 270

Thermal Properties

Latent Heat of Fusion, J/g 280
350
Melting Completion (Liquidus), °C 890
610
Melting Onset (Solidus), °C 890
450
Specific Heat Capacity, J/kg-K 490
980
Thermal Expansion, µm/m-K 11
26

Otherwise Unclassified Properties

Base Metal Price, % relative 55
12
Density, g/cm3 8.0
1.8
Embodied Carbon, kg CO2/kg material 8.8
22
Embodied Energy, MJ/kg 120
150
Embodied Water, L/kg 240
970

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 23
66
Strength to Weight: Axial, points 19
29 to 41
Strength to Weight: Bending, points 19
40 to 51
Thermal Shock Resistance, points 21
11 to 16

Alloy Composition

Aluminum (Al), % 0 to 0.050
5.3 to 6.7
Boron (B), % 0 to 0.010
0
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 13 to 15
0
Cobalt (Co), % 0 to 0.1
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0 to 0.2
0
Magnesium (Mg), % 0
88.6 to 92.1
Manganese (Mn), % 0 to 0.040
0.15 to 0.35
Nickel (Ni), % 73.3 to 77.3
0 to 0.010
Phosphorus (P), % 9.7 to 10.5
0
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 0 to 0.1
0 to 0.3
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0 to 0.050
0
Zinc (Zn), % 0
2.5 to 3.5
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0
0 to 0.3