Aluminium Alloy - BS-L - L81 H16 or H26 Sheet

L81 H16 or H26 Sheet

Applications:
Nameplates, traffic (road) signs, architectural paneling. Welded tubes, chemical industry, irrigation. Offshore applications, welded structures. Pressure vessels, boilermaking.

Characteristic Properties:
Very good corrosion resistance to seawater and marine and industrial atmosphere. Very good weldability. Medium to high strength alloy for sheet products slightly lower than 5086. Medium high fatigue strength. Good cold formability.


Chemical Composition

Spec: BS 3L81(1985)

Alloy L81

Chemical Element % Present
Others (Total) 0.0 - 0.15
Titanium (Ti) 0.0 - 0.15
Iron (Fe) 0.0 - 0.50
Chromium (Cr) 0.0 - 0.15
Copper (Cu) 0.0 - 0.15
Zinc (Zn) 0.0 - 0.15
Manganese (Mn) 0.10 - 0.50
Magnesium (Mg) 1.70 - 2.40
Other (Each) 0.0 - 0.05
Silicon (Si) 0.0 - 0.40
Aluminium (Al) Balance

Properties

Physical PropertyValue
Density 2.69 g/cm³
Melting Point 650 °C
Thermal Expansion 23.6 x10^-6 /K
Modulus of Elasticity 70.0 GPa
Thermal Conductivity 149 W/m.K
Electrical Resistivity 37.5 % IACS

Spec: BS 3L81(1985)

Sheet - 0.4mm to 0.8mm

Mechanical PropertyValue
Tensile Strength 225 Min - 275 Max N/mm2
0.2% Proof Stress 175 Min N/mm2
Elongation A50 mm 3 Min %

Alloy Designations

Aluminium alloy BS L81 - 5251 is covered by standard BS EN 3L81 (1985)


Temper Types

The most common tempers for L81 - 5251 aluminium are:

  • H16 - Work hardened by rolling to three-quarter hard, not annealed after rolling
  • H26 - Work hardened by rolling then annealed to three-quarter hard

Supplied Forms

L81 - 5251 is supplied in the following forms:

  • Sheet
  • Strip
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Last Datasheet Revision

9 January 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.