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AWS BNi-9 vs. ZK51A Magnesium

AWS BNi-9 belongs to the nickel alloys classification, while ZK51A 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-9 and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 72
18
Tensile Strength: Ultimate (UTS), MPa 580
240

Thermal Properties

Latent Heat of Fusion, J/g 300
340
Melting Completion (Liquidus), °C 1060
640
Melting Onset (Solidus), °C 1060
550
Specific Heat Capacity, J/kg-K 480
970
Thermal Expansion, µm/m-K 12
26

Otherwise Unclassified Properties

Base Metal Price, % relative 60
13
Density, g/cm3 8.4
1.8
Embodied Carbon, kg CO2/kg material 9.3
24
Embodied Energy, MJ/kg 130
160
Embodied Water, L/kg 260
940

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 23
64
Strength to Weight: Axial, points 19
36
Strength to Weight: Bending, points 18
47
Thermal Shock Resistance, points 19
15

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Boron (B), % 3.3 to 4.0
0
Carbon (C), % 0 to 0.060
0
Chromium (Cr), % 13.5 to 16.5
0
Cobalt (Co), % 0 to 0.1
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 0 to 1.5
0
Magnesium (Mg), % 0
93.1 to 95.9
Nickel (Ni), % 77.1 to 83.3
0 to 0.010
Phosphorus (P), % 0 to 0.020
0
Selenium (Se), % 0 to 0.0050
0
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0 to 0.050
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0 to 0.050
0.5 to 1.0
Residuals, % 0
0 to 0.3