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AWS BNi-4 vs. AZ31C Magnesium

AWS BNi-4 belongs to the nickel alloys classification, while AZ31C magnesium belongs to the magnesium alloys. There are 19 material properties with values for both materials. Properties with values for just one material (12, 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-4 and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
45
Poisson's Ratio 0.31
0.29
Shear Modulus, GPa 67
17
Tensile Strength: Ultimate (UTS), MPa 430
260

Thermal Properties

Latent Heat of Fusion, J/g 340
350
Melting Completion (Liquidus), °C 1070
600
Melting Onset (Solidus), °C 980
550
Specific Heat Capacity, J/kg-K 470
990
Thermal Expansion, µm/m-K 11
26

Otherwise Unclassified Properties

Base Metal Price, % relative 60
12
Density, g/cm3 8.5
1.7
Embodied Carbon, kg CO2/kg material 10
23
Embodied Energy, MJ/kg 140
160
Embodied Water, L/kg 220
970

Common Calculations

Stiffness to Weight: Axial, points 12
15
Stiffness to Weight: Bending, points 22
70
Strength to Weight: Axial, points 14
42
Strength to Weight: Bending, points 15
53
Thermal Shock Resistance, points 16
16

Alloy Composition

Aluminum (Al), % 0 to 0.050
2.4 to 3.6
Boron (B), % 1.5 to 2.2
0
Carbon (C), % 0 to 0.060
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
93.4 to 97
Manganese (Mn), % 0
0.15 to 1.0
Nickel (Ni), % 91.4 to 95.5
0 to 0.030
Phosphorus (P), % 0 to 0.020
0
Selenium (Se), % 0 to 0.0050
0
Silicon (Si), % 3.0 to 4.0
0 to 0.1
Sulfur (S), % 0 to 0.020
0
Titanium (Ti), % 0 to 0.050
0
Zinc (Zn), % 0
0.5 to 1.5
Zirconium (Zr), % 0 to 0.050
0
Residuals, % 0
0 to 0.3