Technical data sheets
Aluminium Alloy | BS-L
2L77 T6
Applications:
High strength structural components: aircraft (e.g. fittings and wheels), military vehicles and bridges, forgings for trucks and machinery (hydraulic etc.). Weapons manufacture, structural applications.
Characteristic Properties:
Heat treatable alloy. High mechanical strength slightly higher than 2011 and 2017A.
Chemical Composition
|
BS 2L77(1971) Alloy 2L77 |
|
|---|---|
| Chemical Element | % Present |
| Aluminium (Al) | balance |
| Tin (Sn) | 0.05 max |
| Lead (Pb) | 0.05 max |
| Chromium (Cr) | 0.1 max |
| Zinc (Zn) | 0.2 max |
| Titanium + Zirconium (Ti+Zr) | 0.2 max |
| Nickel (Ni) | 0.2 max |
| Iron (Fe) | 0.5 max |
| Magnesium (Mg) | 0.2 - 0.8 |
| Silicon (Si) | 0.5 - 0.9 |
| Manganese (Mn) | 0.4 - 1.2 |
| Copper (Cu) | 3.9 - 5 |
Forging Stock: Cast billets and slabs for hot working and extruded bars, sections and hot-rolled plate for forging shall be supplied non-heat treated. Forgings: Unless otherwise agreed between the manufacturer and the purchaser and stated on the order, forgings shall be supplied solution treated and precipitation treated.
Alloy Designations
Aluminium alloy 2L77 - 2014A is covered by standard BS EN 4L77 (1971)
Temper Types
The most common temper for 2L77 - 2014A aluminium forging stock is:
- T6
Supplied Forms
2L77 - 2014A aluminium is supplied as forging stock made from cast billet, extruded stock or rolled plate.
- Forgings
- Bar
- Castings
- Extrusions
- Plate
Generic Physical Properties
| Physical Property | Value |
|---|---|
| Density | 2.80 g/cm³ |
| Melting Point | 640 °C |
| Thermal Expansion | 22.8 x10^-6 /K |
| Modulus of Elasticity | 73 GPa |
| Thermal Conductivity | 134-155 W/m.K |
Mechanical Properties
|
BS 2L77(1971) - |
|
|---|---|
| Mechanical Property | Value |
| Elongation A50 mm | 6 Min % |
| Hardness Brinell | 134 Min HB |
| Proof Stress | 395 Min MPa |
| Tensile Strength | 450 Min MPa |
This specification covers forging stock and forgings of aluminium-copper-magnesium-silicon-manganese alloy in the solution treated and precipitation treated condition. The values shown in the mechanical properties apply to test pieces prepared by forging covering extruded forging stock and forgings made from cast billets, hot-rolled plate and extruded stock in all sizes.
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Last updated Tuesday, January 7, 2014
Disclaimer
This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.
Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.
The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed & online) and manufacturers’ data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources.
Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards.
As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose, whether expressed or implied.
Advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. All transactions are subject to the Company’s current Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions; a copy of which is available on request.