Description
Aluminium Alloy 6061 T6 Plates & Sheets
6061 T6 is a precipitation-hardened aluminum alloy, containing magnesium and silicon as its major alloying elements. Originally called “Alloy 61S”, it was developed in 1935. It has good mechanical properties, exhibits good weldability, and is very commonly extruded. 6061 is one of the most common alloys of aluminum for general-purpose use.
It is commonly available in pre-tempered grades such as 6061-O (annealed), tempered grades such as 6061-T6 (solutionized and artificially aged) and 6061-T651 (solutionized, stress-relieved stretched and artificially aged).
Key Words:
- • AL6061
- • UNS A96061
- • ISO AlMg1SiCu
- • Aluminium 6061-T6
- • AD-33 (Russia)
- • AA6061-T6
- • 6061T6
- • UNS A96061
- • ISO AlMg1SiCu
- • Aluminium 6061-T651
- • AD-33 (Russia)
- • AA6061-T651
Chemical composition of Aluminium 6061 :
| Element | Min. | Max. | |
| Silicon | Si | 0.40 | 0.81 |
| Iron | Fe | – | 0.70 |
| Copper | Cu | 0.15 | 0.40 |
| Manganese | Mn | – | 0.15 |
| Magnesium | Mg | 0.80 | 1.20 |
| Chromium | Cr | 0.04 | 0.35 |
| Zinc | Zn | – | 0.25 |
| Titanium | Ti | – | 0.15 |
| Aluminium | Al | 95.85 | 98.56 |
Mechanical properties of Aluminium 6061-T6 :
T6 temper 6061 has an ultimate tensile strength of at least 290 MPa (42,000 psi) and yield strength of at least 240 MPa (35,000 psi). More typical values are 310 MPa (45 ksi) and 270 MPa (39 ksi), respectively. In thicknesses of 6.35 mm (0.250 in) or less, it has elongation of 8% or more; in thicker sections, it has elongation of 10%. T651 temper has similar mechanical properties. The typical value for thermal conductivity for 6061-T6 at 25 °C (77 °F) is around 152 W/m K. A material data sheet defines the fatigue limit under cyclic load as 97 MPa (14,000 psi) for 500,000,000 completely reversed cycles using a standard RR Moore test machine and specimen. Note that aluminum does not exhibit a well defined “knee” on its S-n graph, so there is some debate as to how many cycles equates to “infinite life”. Also note the actual value of fatigue limit for an application can be dramatically affected by the conventional de-rating factors of loading, gradient, and surface finish.
6061 T6 is used for:
- • Bicycle Frames And Components.
- • Many Fly Fishing Reels.
- • The Pioneer Plaque Was Made Of This Alloy.
- • The Upper and Lower Receivers Of Many Non Mil-Spec Ar-15 Rifle Variants.
- • Many aluminum docks and gangways are constructed with 6061-T6 extrusions, and welded into place.
- • Material used in some ultra-high vacuum (UHV) chambers
- • Many parts for remote controlled model aircraft, notably helicopter rotor components.
- • Large amateur radio antennas.
Applications:
Aircraft fittings, camera lens mounts, couplings, marines fittings and hardware, electrical fittings and connectors, decorative or misc. hardware, hinge pins, magneto parts, brake pistons, hydraulic pistons, appliance fittings, valves and valve parts; bike frames.
