Marine aluminum plate can be divided into deformed aluminum plate and cast aluminum plate according to different manufacturing processes. Because marine aluminum plate has special requirements for strength, corrosion resistance and weldability, marine aluminum plate mostly adopts aluminum magnesium alloy, aluminum magnesium silicon alloy and aluminum zinc magnesium alloy. Among them, 5 series aluminum magnesium alloy is most widely used in ships, 5. What are the characteristics of marine aluminum plate?
There are mainly 5083, 5086 and 5456 aluminum plates for 5-series ships. Intergranular corrosion of 6 series alloy occurs in seawater, so it is widely used in ship superstructure. The disadvantage of 7 series alloy is poor corrosion resistance, so its application range is limited. Overall, 5 Series marine aluminum plate is the most widely used and promising aluminum plate product at present.
5083 aluminum plate can be regarded as the representative product of 5 series marine grade aluminum alloy, with the status of O, h111, h112, h116, H321, etc. the alloy composition of 5083 aluminum plate is: Aluminum al: surplus, 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 ~ 0.4005083 aluminum plate has medium strength, good corrosion resistance and formability, It has high fatigue resistance and is generally used as the main structure of the hull. Others, such as 5052, 5086, 5454, 5456, etc., are also commonly used in hull structure or pressure vessel, pipeline, hull and deck.
Generally speaking, the thickness of plates is determined by the hull structure, ship specifications and application parts. From the perspective of hull lightweight, thin plates are generally used as much as possible, but the depth of plate corrosion within the service time should also be considered. The commonly used plates are thin plates of more than 1.6mm and thick plates of more than 30mm. Some plates with special specifications are also used according to the shipyard contract. For anti-skid, the deck adopts checkered plate.
From the perspective of marine aluminum plate development, at present, many domestic aluminum processing manufacturers have begun to focus on the research and development of 5-series and 6-series marine aluminum plates, strengthen scientific research, expand production scale, and enter high-end manufacturing markets such as marine aluminum plates