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AWS BMg-1 vs. AWS BNi-7

AWS BMg-1 belongs to the magnesium alloys classification, while AWS BNi-7 belongs to the nickel alloys. There are 20 material properties with values for both materials. Properties with values for just one material (11, 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 BMg-1 and the bottom bar is AWS BNi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
170
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
67
Tensile Strength: Ultimate (UTS), MPa 180
550

Thermal Properties

Brazing Temperature, °C 600 to 630
930 to 1090
Latent Heat of Fusion, J/g 350
280
Melting Completion (Liquidus), °C 600
890
Melting Onset (Solidus), °C 440
890
Specific Heat Capacity, J/kg-K 980
490
Thermal Expansion, µm/m-K 26
11

Otherwise Unclassified Properties

Base Metal Price, % relative 12
55
Density, g/cm3 1.8
8.0
Embodied Carbon, kg CO2/kg material 22
8.8
Embodied Energy, MJ/kg 160
120
Embodied Water, L/kg 980
240

Common Calculations

Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 66
23
Strength to Weight: Axial, points 27
19
Strength to Weight: Bending, points 39
19
Thermal Shock Resistance, points 10
21

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0 to 0.050
Beryllium (Be), % 0.00020 to 0.00080
0
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 0.050
0
Iron (Fe), % 0 to 0.0050
0 to 0.2
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
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 0.050
0 to 0.1
Sulfur (S), % 0
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Zinc (Zn), % 1.7 to 2.3
0
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0 to 0.3
0 to 0.5