The marine grade aluminum sheets are mainly 5xxx and 6xxx aluminum alloys. According to the positions used, they are divided into aluminum alloys for upper outfitting and aluminum alloys for hull structure. The commonly used aluminum alloy profile for portholes is a 6063 aluminum plate.
Alu 6063 is an Al-Mg-Si series with high plasticity, good processing properties, excellent weldability, extrudability, and electroplating properties, good corrosion resistance, toughness, easy polishing, and excellent anodizing effect. Therefore, it is widely used in construction profiles, irrigation pipes, gangways, benches, furniture, elevators, fences, and other fields.