6261-O Aluminum
6261-O aluminum is 6261 aluminum in the annealed condition. The graph bars on the material properties cards below compare 6261-O aluminum to: 6000-series alloys (top), all aluminum alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
69 GPa 10 x 106 psi
Elongation at Break
16 %
Fatigue Strength
110 MPa 16 x 103 psi
Poisson's Ratio
0.33
Shear Modulus
26 GPa 3.7 x 106 psi
Shear Strength
92 MPa 13 x 103 psi
Tensile Strength: Ultimate (UTS)
150 MPa 22 x 103 psi
Tensile Strength: Yield (Proof)
100 MPa 15 x 103 psi
Thermal Properties
Latent Heat of Fusion
400 J/g
Maximum Temperature: Mechanical
160 °C 320 °F
Melting Completion (Liquidus)
640 °C 1190 °F
Melting Onset (Solidus)
610 °C 1140 °F
Specific Heat Capacity
900 J/kg-K 0.21 BTU/lb-°F
Thermal Conductivity
180 W/m-K 110 BTU/h-ft-°F
Thermal Expansion
23 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
48 % IACS
Electrical Conductivity: Equal Weight (Specific)
160 % IACS
Otherwise Unclassified Properties
Base Metal Price
9.5 % relative
Density
2.7 g/cm3 170 lb/ft3
Embodied Carbon
8.3 kg CO2/kg material
Embodied Energy
150 MJ/kg 66 x 103 BTU/lb
Embodied Water
1180 L/kg 140 gal/lb
Common Calculations
Resilience: Ultimate (Unit Rupture Work)
21 MJ/m3
Resilience: Unit (Modulus of Resilience)
77 kJ/m3
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
50 points
Strength to Weight: Axial
15 points
Strength to Weight: Bending
23 points
Thermal Diffusivity
75 mm2/s
Thermal Shock Resistance
6.7 points
Alloy Composition
| Al | 96.6 to 98.6 | |
| Mg | 0.7 to 1.0 | |
| Si | 0.4 to 0.7 | |
| Mn | 0.2 to 0.35 | |
| Cu | 0.15 to 0.4 | |
| Fe | 0 to 0.4 | |
| Zn | 0 to 0.2 | |
| Cr | 0 to 0.1 | |
| Ti | 0 to 0.1 | |
| res. | 0 to 0.15 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
EN 755-2: Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Mechanical properties
EN 573-3: Aluminium and aluminium alloys. Chemical composition and form of wrought products. Chemical composition and form of products
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM Handbook vol. 2, ASM International, 1993
CRC Materials Science and Engineering Handbook, 4th ed., James F. Shackelford et al. (editors), 2015