What thickness aluminum for boat deck will be based on the specific type of ship, design requirements and usage. Different types of ships and different working environments have different needs for the thickness of aluminum sheets for boat decks. Generally speaking, the aluminum sheet thickness for boat deck can vary from 2mm to 50mm. For example, the decks of common vessels such as yachts, grain carriers, fishing boats, and workboats may use thinner aluminum sheets, such as 1-5mm thickness. For larger ships or ships that need to carry greater loads, such as large ships, such as tankers and cargo ships, the thickness of aluminum sheets for the boat deck may be thicker to achieve the required strength and durability.

The selection of the aluminum sheet thickness for boat deck needs to take into account a variety of factors, including the ship's operating environment (e.g., seawater corrosion, wind and wave impacts, etc.), load requirements, structural design, and so on. In addition, the material, surface treatment, and alloy composition of the marine aluminum sheet will also have an impact on the performance of the deck. It should be noted that the thickness of the aluminum sheets for boat deck is not the only factor that determines its performance, the material, condition, surface treatment, etc. of the aluminum sheet will also have an impact on the performance of the boat. Therefore, when choosing aluminum sheets for ship deck, comprehensive consideration needs to be made according to the specific use environment and requirements.

Therefore, when choosing the aluminum sheet thickness for boat deck, comprehensive consideration needs to be made, including the specific needs of the ship, engineering practices and requirements of relevant standards. It is best to consult professional marine designers or aluminum sheet suppliers to get the most accurate and appropriate advice. In addition, marine aluminum sheets need to comply with relevant standards and specifications to ensure their quality and safety.