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AWS BMg-1 vs. C68400 Brass

AWS BMg-1 belongs to the magnesium alloys classification, while C68400 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 C68400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
110
Elongation at Break, % 3.8
18
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
41
Shear Strength, MPa 100
330
Tensile Strength: Ultimate (UTS), MPa 180
540
Tensile Strength: Yield (Proof), MPa 110
310

Thermal Properties

Latent Heat of Fusion, J/g 350
210
Maximum Temperature: Mechanical, °C 130
130
Melting Completion (Liquidus), °C 600
840
Melting Onset (Solidus), °C 440
820
Specific Heat Capacity, J/kg-K 980
400
Thermal Conductivity, W/m-K 76
66
Thermal Expansion, µm/m-K 26
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
87
Electrical Conductivity: Equal Weight (Specific), % IACS 55
99

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 1.8
7.9
Embodied Carbon, kg CO2/kg material 22
2.7
Embodied Energy, MJ/kg 160
47
Embodied Water, L/kg 980
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
81
Resilience: Unit (Modulus of Resilience), kJ/m3 120
460
Stiffness to Weight: Axial, points 14
7.5
Stiffness to Weight: Bending, points 66
20
Strength to Weight: Axial, points 27
19
Strength to Weight: Bending, points 39
19
Thermal Diffusivity, mm2/s 43
21
Thermal Shock Resistance, points 10
18

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0 to 0.5
Beryllium (Be), % 0.00020 to 0.00080
0
Boron (B), % 0
0.0010 to 0.030
Copper (Cu), % 0 to 0.050
59 to 64
Iron (Fe), % 0 to 0.0050
0 to 1.0
Lead (Pb), % 0
0 to 0.090
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
0.2 to 1.5
Nickel (Ni), % 0 to 0.0050
0 to 0.5
Phosphorus (P), % 0
0.030 to 0.3
Silicon (Si), % 0 to 0.050
1.5 to 2.5
Tin (Sn), % 0
0 to 0.5
Zinc (Zn), % 1.7 to 2.3
28.6 to 39.3
Residuals, % 0 to 0.3
0 to 0.5