Technical data sheets
Aluminium Alloy | BS-L
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
|
BS 3L81(1985) Alloy L81 |
|
|---|---|
| Chemical Element | % Present |
| Aluminium (Al) | balance |
| Other (Each) | 0.05 max |
| Others (Total) | 0.15 max |
| Titanium (Ti) | 0.15 max |
| Chromium (Cr) | 0.15 max |
| Copper (Cu) | 0.15 max |
| Zinc (Zn) | 0.15 max |
| Silicon (Si) | 0.4 max |
| Iron (Fe) | 0.5 max |
| Manganese (Mn) | 0.1 - 0.5 |
| Magnesium (Mg) | 1.7 - 2.4 |
The material shall be supplied cold rolled (H16) or cold rolled and partially annelaed (H26).
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
- H26
Supplied Forms
L81 - 5251 is supplied in the following forms:
- Sheet
- Strip
Generic Physical Properties
| Physical Property | Value |
|---|---|
| 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 |
Mechanical Properties
|
BS 3L81(1985) Sheet - 0.4mm to 0.8mm |
|
|---|---|
| Mechanical Property | Value |
| Tensile Strength | 225 Min - 275 Max N/mm2 |
| 0.2% Proof Stress | 175 Min N/mm2 |
| Elongation A50 mm | 3 Min % |
Mechanical properties relate to material with a nominal thickness of 0.4mm up to and including 0.8mm. The specification contains other values for different material thicknesses.
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Last updated Thursday, January 9, 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.