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EN-MC21320 Magnesium vs. AWS BNi-2

EN-MC21320 magnesium belongs to the magnesium alloys classification, while AWS BNi-2 belongs to the nickel 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 EN-MC21320 magnesium and the bottom bar is AWS BNi-2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
180
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
68
Tensile Strength: Ultimate (UTS), MPa 230
440

Thermal Properties

Latent Heat of Fusion, J/g 370
360
Melting Completion (Liquidus), °C 600
1000
Melting Onset (Solidus), °C 530
970
Specific Heat Capacity, J/kg-K 1000
490
Thermal Expansion, µm/m-K 26
11

Otherwise Unclassified Properties

Base Metal Price, % relative 12
55
Density, g/cm3 1.6
8.2
Embodied Carbon, kg CO2/kg material 23
9.3
Embodied Energy, MJ/kg 160
130
Embodied Water, L/kg 980
230

Common Calculations

Stiffness to Weight: Axial, points 15
12
Stiffness to Weight: Bending, points 72
23
Strength to Weight: Axial, points 38
15
Strength to Weight: Bending, points 50
16
Thermal Shock Resistance, points 13
16

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0 to 0.050
Boron (B), % 0
2.8 to 3.5
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
6.0 to 8.0
Cobalt (Co), % 0
0 to 0.1
Copper (Cu), % 0 to 0.010
0
Iron (Fe), % 0 to 0.0050
2.5 to 3.5
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0
Nickel (Ni), % 0 to 0.0020
79.1 to 84.8
Phosphorus (P), % 0
0 to 0.020
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0.5 to 1.5
4.0 to 5.0
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0 to 0.010
0 to 0.5