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L111 Aluminium Alloy Bar & Extrusion T6511

Heat treatable aerospace aluminium alloy with very good corrosion resistance and weldability.

L111 is a medium strength extruded bar with an alloy strength somewhat higher than alloy 6061. It is not suitable for complex sections.

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L111 T6511 Aluminium Related Specifications

System / Standard Country / Region Grade / Designation / Note
AA USA No single official AA number; L111-T6511 is a BS aerospace code
UNS International No specific UNS assigned; depends on the alloy defined in the spec
EN / DIN Europe No unique EN AW mapping; refer to the BS L111 material specification
GB (BS Aerospace) United Kingdom L111-T6511 – aluminium alloy extruded bars/sections, T6511 temper
JIS Japan No direct JIS equivalent published
AFNOR France No direct AFNOR equivalent published

Properties

Chemical Composition

Alloy L111

BS L111 (1971)

Chemical Element % Present
Manganese (Mn) 0.40 - 1.00
Silicon (Si) 0.70 - 1.30
Magnesium (Mg) 0.50 - 1.20
Copper (Cu) 0.00 - 0.10
Iron (Fe) 0.00 - 0.50
Tin (Sn) 0.00 - 0.05
Chromium (Cr) 0.00 - 0.25
Nickel (Ni) 0.00 - 0.10
Lead (Pb) 0.00 - 0.05
Titanium (Ti) 0.00 - 0.20
Zinc (Zn) 0.00 - 0.20
Aluminium (Al) Balance

Alloy L111 - Mechanical Properties T6511 Temper for Various Dimensions

BS L111 (1971)

Mechanical Property Value
>20mm Proof Strength 255 Min
>20mm Tensile Strength 295 Min
>20mm Elongation 7% min
20mm - 150mm Proof Stress 270 min
20mm - 150mm Tensile Strength 310 Min
20mm - 150mm Elongation 8% min
150mm - 200mm Proof Stress 240 Min
150mm - 200mm Tensile Strength 280 Min
150mm - 200mm Elongation 5% Min

Alloy L111

BS L111 (1971)

Physical Property Value
Density 2710 g/cm³
Melting Point 650 °C
Thermal Expansion 23.10 x 10-6/K
Modulus of Elasticity 70000 GPa
Thermal Conductivity 167-216 W/m.K

Applications

Characteristics

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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 S 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.

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