AWS BMg-1 vs. 4145 Aluminum
AWS BMg-1 belongs to the magnesium alloys classification, while 4145 aluminum belongs to the aluminum alloys.
For each property being compared, the top bar is AWS BMg-1 and the bottom bar is 4145 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 47 | |
| 73 |
| Elongation at Break, % | 3.8 | |
| 2.2 |
| Fatigue Strength, MPa | 72 | |
| 48 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 18 | |
| 28 |
| Shear Strength, MPa | 100 | |
| 69 |
| Tensile Strength: Ultimate (UTS), MPa | 180 | |
| 120 |
| Tensile Strength: Yield (Proof), MPa | 110 | |
| 68 |
Thermal Properties
| Brazing Temperature, °C | 600 to 630 | |
| 570 to 600 |
| Latent Heat of Fusion, J/g | 350 | |
| 540 |
| Maximum Temperature: Mechanical, °C | 130 | |
| 160 |
| Melting Completion (Liquidus), °C | 600 | |
| 590 |
| Melting Onset (Solidus), °C | 440 | |
| 520 |
| Specific Heat Capacity, J/kg-K | 980 | |
| 880 |
| Thermal Conductivity, W/m-K | 76 | |
| 100 |
| Thermal Expansion, µm/m-K | 26 | |
| 21 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 11 | |
| 26 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 55 | |
| 84 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 12 | |
| 10 |
| Density, g/cm3 | 1.8 | |
| 2.8 |
| Embodied Carbon, kg CO2/kg material | 22 | |
| 7.6 |
| Embodied Energy, MJ/kg | 160 | |
| 140 |
| Embodied Water, L/kg | 980 | |
| 1040 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 5.9 | |
| 2.3 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 120 | |
| 31 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 66 | |
| 50 |
| Strength to Weight: Axial, points | 27 | |
| 12 |
| Strength to Weight: Bending, points | 39 | |
| 19 |
| Thermal Diffusivity, mm2/s | 43 | |
| 42 |
| Thermal Shock Resistance, points | 10 | |
| 5.5 |
Alloy Composition
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| Aluminum (Al), % | 8.3 to 9.7 | |
| 83 to 87.4 |
| Beryllium (Be), % | 0.00020 to 0.00080 | |
| 0 |
| Chromium (Cr), % | 0 | |
| 0 to 0.15 |
| Copper (Cu), % | 0 to 0.050 | |
| 3.3 to 4.7 |
| Iron (Fe), % | 0 to 0.0050 | |
| 0 to 0.8 |
| Magnesium (Mg), % | 86.1 to 89.8 | |
| 0 to 0.15 |
| Manganese (Mn), % | 0.15 to 1.5 | |
| 0 to 0.15 |
| Nickel (Ni), % | 0 to 0.0050 | |
| 0 |
| Silicon (Si), % | 0 to 0.050 | |
| 9.3 to 10.7 |
| Zinc (Zn), % | 1.7 to 2.3 | |
| 0 to 0.2 |
| Residuals, % | 0 to 0.3 | |
| 0 to 0.15 |