Performance of 5083/5086/5454 marine aluminum sheet？

Marine aluminum sheets can be divided into deformed aluminum sheets and cast aluminum sheets according to different manufacturing processes. Since marine aluminum sheets have special requirements for strength, corrosion resistance, and weldability, aluminum-magnesium alloys, aluminum-magnesium- Silicon-based alloys and aluminum-zinc-magnesium alloys, among which 5-series aluminum-magnesium alloys are most widely used on ships.

There are mainly three types of 5-series marine aluminum sheets: 5083 aluminum sheet, 5086 aluminum sheet, and 5456 aluminum sheet. The 6-series alloys will undergo intergranular corrosion in seawater, so the superstructure of ships is often used. The disadvantage of the 7-series alloys is their poor corrosion resistance, so the scope of use is limited. On the whole, the 5 series marine aluminum sheet is currently the most widely used and most promising aluminum sheet product.

The 5083 aluminum sheet can be regarded as a representative product of the 5 series marine aluminum sheet, and the states include O, H111, H112, H116, H321, etc. The alloy composition of the 5083 aluminum sheet is: aluminum Al: balance, silicon Si: ≤0.40, copper Cu: ≤0.10, Magnesium Mg: 4.0~4.9, Zinc Zn: ≤0.25 Manganese Mn: 0.40~1.0 Titanium Ti: ≤0.15 Chromium Cr: 0.05~0.25 Iron Fe: 0~0.400, 5083 aluminum sheet has medium strength, good corrosion resistance and formability, anti-corrosion High fatigue, generally used as the main structure of the hull. Others such as 5052, 5086, 5454, 5456, etc. are also mostly used in hull structures or pressure vessels, pipelines, hulls and decks.

Generally speaking, the thickness of the sheet used is determined by the hull structure, ship specifications, and the location of use. From the perspective of hull weight reduction, thin sheets are generally used as much as possible, but the corrosion depth of the sheet within the service time should also be considered. Usually used There are thin sheets over 1.6mm and thick sheets over 30mm. There are also sheets of special specifications used in accordance with shipyard contracts. For anti-slip, the deck adopts checkered sheet.

With the improvement of research and development innovation and production capacity, the 5 series marine aluminum sheet will usher in greater development opportunities, providing a broad development space for the transformation and upgrading of aluminum processing.