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AWS BMg-1 vs. C18900 Copper

AWS BMg-1 belongs to the magnesium alloys classification, while C18900 copper belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 C18900 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 47
120
Elongation at Break, % 3.8
14 to 48
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
43
Shear Strength, MPa 100
190 to 300
Tensile Strength: Ultimate (UTS), MPa 180
260 to 500
Tensile Strength: Yield (Proof), MPa 110
67 to 390

Thermal Properties

Latent Heat of Fusion, J/g 350
210
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
1080
Melting Onset (Solidus), °C 440
1020
Specific Heat Capacity, J/kg-K 980
390
Thermal Conductivity, W/m-K 76
130
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
30
Electrical Conductivity: Equal Weight (Specific), % IACS 55
30

Otherwise Unclassified Properties

Base Metal Price, % relative 12
31
Density, g/cm3 1.8
8.9
Embodied Carbon, kg CO2/kg material 22
2.7
Embodied Energy, MJ/kg 160
42
Embodied Water, L/kg 980
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.9
65 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 120
20 to 660
Stiffness to Weight: Axial, points 14
7.2
Stiffness to Weight: Bending, points 66
18
Strength to Weight: Axial, points 27
8.2 to 16
Strength to Weight: Bending, points 39
10 to 16
Thermal Diffusivity, mm2/s 43
38
Thermal Shock Resistance, points 10
9.3 to 18

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0 to 0.010
Beryllium (Be), % 0.00020 to 0.00080
0
Copper (Cu), % 0 to 0.050
97.7 to 99.15
Iron (Fe), % 0 to 0.0050
0
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 86.1 to 89.8
0
Manganese (Mn), % 0.15 to 1.5
0.1 to 0.3
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.050
Silicon (Si), % 0 to 0.050
0.15 to 0.4
Tin (Sn), % 0
0.6 to 0.9
Zinc (Zn), % 1.7 to 2.3
0 to 0.1
Residuals, % 0 to 0.3
0 to 0.5