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WE54A Magnesium vs. AWS BNi-7

WE54A magnesium belongs to the magnesium alloys classification, while AWS BNi-7 belongs to the nickel alloys. There are 19 material properties with values for both materials. Properties with values for just one material (14, 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 WE54A magnesium and the bottom bar is AWS BNi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
170
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 17
67
Tensile Strength: Ultimate (UTS), MPa 270 to 300
550

Thermal Properties

Latent Heat of Fusion, J/g 330
280
Melting Completion (Liquidus), °C 640
890
Melting Onset (Solidus), °C 570
890
Specific Heat Capacity, J/kg-K 960
490
Thermal Expansion, µm/m-K 25
11

Otherwise Unclassified Properties

Base Metal Price, % relative 34
55
Density, g/cm3 1.9
8.0
Embodied Carbon, kg CO2/kg material 29
8.8
Embodied Energy, MJ/kg 260
120
Embodied Water, L/kg 900
240

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 62
23
Strength to Weight: Axial, points 39 to 43
19
Strength to Weight: Bending, points 49 to 51
19
Thermal Shock Resistance, points 18 to 19
21

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0 to 0.010
Carbon (C), % 0
0 to 0.060
Chromium (Cr), % 0
13 to 15
Cobalt (Co), % 0
0 to 0.1
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.010
0 to 0.2
Lithium (Li), % 0 to 0.2
0
Magnesium (Mg), % 88.7 to 93.4
0
Manganese (Mn), % 0 to 0.030
0 to 0.040
Nickel (Ni), % 0 to 0.0050
73.3 to 77.3
Phosphorus (P), % 0
9.7 to 10.5
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0 to 0.010
0 to 0.1
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Unspecified Rare Earths, % 1.5 to 4.0
0
Yttrium (Y), % 4.8 to 5.5
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0 to 0.050
Residuals, % 0
0 to 0.5