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