6061-T6 Aluminum vs. 6061-T651 Aluminum
Both 6061-T6 aluminum and 6061-T651 aluminum are variants of the same material. They share alloy composition and many physical properties, but develop different mechanical properties as a result of different processing.
For each property being compared, the top bar is 6061-T6 aluminum and the bottom bar is 6061-T651 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 93 | |
| 93 |
| Elastic (Young's, Tensile) Modulus, GPa | 69 | |
| 69 |
| Elongation at Break, % | 10 | |
| 11 |
| Fatigue Strength, MPa | 96 | |
| 95 |
| Poisson's Ratio | 0.33 | |
| 0.33 |
| Shear Modulus, GPa | 26 | |
| 26 |
| Shear Strength, MPa | 210 | |
| 210 |
| Tensile Strength: Ultimate (UTS), MPa | 310 | |
| 320 |
| Tensile Strength: Yield (Proof), MPa | 270 | |
| 270 |
Thermal Properties
| Latent Heat of Fusion, J/g | 400 | |
| 400 |
| Maximum Temperature: Mechanical, °C | 170 | |
| 170 |
| Melting Completion (Liquidus), °C | 650 | |
| 650 |
| Melting Onset (Solidus), °C | 580 | |
| 580 |
| Specific Heat Capacity, J/kg-K | 900 | |
| 900 |
| Thermal Conductivity, W/m-K | 170 | |
| 170 |
| Thermal Expansion, µm/m-K | 24 | |
| 24 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 43 | |
| 43 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 140 | |
| 140 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 9.5 |
| Calomel Potential, mV | -740 | |
| -740 |
| Density, g/cm3 | 2.7 | |
| 2.7 |
| Embodied Carbon, kg CO2/kg material | 8.3 | |
| 8.3 |
| Embodied Energy, MJ/kg | 150 | |
| 150 |
| Embodied Water, L/kg | 1180 | |
| 1180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 30 | |
| 33 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 520 | |
| 520 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 50 | |
| 50 |
| Strength to Weight: Axial, points | 31 | |
| 32 |
| Strength to Weight: Bending, points | 37 | |
| 38 |
| Thermal Diffusivity, mm2/s | 68 | |
| 68 |
| Thermal Shock Resistance, points | 14 | |
| 14 |
Alloy Composition
| Aluminum (Al), % | 95.9 to 98.6 | |
| 95.9 to 98.6 |
| Chromium (Cr), % | 0.040 to 0.35 | |
| 0.040 to 0.35 |
| Copper (Cu), % | 0.15 to 0.4 | |
| 0.15 to 0.4 |
| Iron (Fe), % | 0 to 0.7 | |
| 0 to 0.7 |
| Magnesium (Mg), % | 0.8 to 1.2 | |
| 0.8 to 1.2 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0 to 0.15 |
| Silicon (Si), % | 0.4 to 0.8 | |
| 0.4 to 0.8 |
| Titanium (Ti), % | 0 to 0.15 | |
| 0 to 0.15 |
| Zinc (Zn), % | 0 to 0.25 | |
| 0 to 0.25 |
| Residuals, % | 0 | |
| 0 to 0.15 |