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2218 aluminium alloy is an alloy in the wrought aluminium-copper family (2000 or 2xxx series). It is one of the most complex grades in the 2000 series, with at least 88.4% aluminium by weight. Unlike most other aluminium-copper alloys, 2218 is a high work-ability alloy, with relatively low for 2xxx series alloy yield strength of 255 MPa. Despite being highly alloyed, it have a good corrosion and oxidation resistance due sacrificial anode formed by magnesium inclusions, similar to marine-grade 5xxx series alloys. Although 2218 is wrought alloy, owing to granular structure it can be used in casting and been precisely machined after casting. It is easy to weld, coat, or glue.
2218 aluminum is a 2000-series aluminum alloy: the main alloying addition is copper, and it is formulated for primary forming into wrought products. 2218 is the Aluminum Association (AA) designation for this material. In European standards, it will be given as EN AW-2218. Additionally, the British Standard (BS) designation is 6L25. The AFNOR (French) designation is A-U4N. And the UNS number is A92218. It has been in use since 1930, but has only received its standard designation in 1954. The properties of 2218 aluminum include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare 2218 aluminum to: 2000-series alloys (top), all aluminum alloys (middle), and the entire database (bottom).
Good workability, thermal conductivity and dimensional stability make 2218 alloy a material of choice whenever high-precision parts subject to thermal shocks (especially piston engine cylinders and cylinder heads) are needed.
2218 alloy can be heat treated to increase tensile strength in expense of workability, with most common grades been F, T61, T71 and T72.
The chemical composition of 2218 alloy is poorly standardized, with several variants in production. All variants include both copper (4%) and magnesium (1.5%) as major alloying elements. Common alloy variants also include 2% of nickel. The alloy composition of 2218 aluminium is:[2][3][4]
The following table shows the chemical composition of aluminium / aluminum 2218 alloy.
| Element | Content (%) |
|---|---|
| Aluminum, Al | 92.50 |
| Copper, Cu | 4 |
| Nickel, Ni | 2 |
| Magnesium, Mg | 1.5 |
1) Aircraft,automobile,train
2) Building wall,ceilings,furniture cabinet,lighting plate
3) Shipping plate,solar reflective plate,corner protector,insulation material
4) Beverage bottle,cap,ring-pull,cosmetics shell and cover
5) Electrical products shell,engineering machinery plate
6) PS baseplate,CTP baseplate,signs,nameplate
7) Alumimum tread/embossed plate,quenched and pre-stretched plate
8) Aluminum reefer containers and special containers,etc.
Baowu Aluminum (Shandong) Co., Ltd. is located in Dongchangfu county, which is the largest aluminum manufacturing county in north China. The factory is only one kilometer from the Jiliao expressway, which make our transportation more convenient. Our total investment is more than one billion yuan for two large factories. The factory covers an area of 120, 000 Square Meters and The company employs more than 500 staff, including over 60 engineering technicians. Our annual output capacity is more than 120, 000 tons of aluminium profiles. Baowu has been awarded the honorary titles of "China Patent Shandong Star Enterprise", "Key Enterprise of Shandong Architectural Profile Industry", "Famous Brand of the Province Construction Machinery Industry", "Shandong Famous Brand", "Well-known Trade Mark of Shandong Province", "China Energy-saving Product Certification", etc. Our company was appraised as a national medium-sized enterprise by the Agricultural Ministry of China in 2004. As a professional aluminum profiles manufacturer, we specialized in manufacturing building door and window, decoration, curtain wall and industrial aluminum profiles.
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