Marine Grade Aluminum Plate Alloys and Applications

Publish: Jun 15, 2020Modify: Jun 15, 2020Author: DollyFrom: Haomei Haomei

What are the common marine grade aluminum plates and what’s their role in ship building? Here is the comprehensive introduction of 5052, 5083, 5086, 6061,etc. Learn more.

Marine grade aluminum plate can be wrought aluminium alloy and cast aluminum alloys according to different manufacturing processes. Because marine grade aluminum has special requirements on strength, corrosion resistance, weldability, etc., it mostly use Al-Mg, Al-Mg-Si and Al-Zn-Mg aluminum alloy. Of them, Al-Mg aluminum alloy is most widely used on ships.

Marine grade aluminum plate.jpg

According to the application, marine grade aluminum sheet can be aluminum alloys for hull structures and for outfitting. The aluminum alloys used for ship hull structures are mainly 5083, 5086 and 5456.

6000 series alloy can be used in the superstructure of ships because it has inter-granular corrosion when it directly contacts with sea water. The strength and process performance of the 7000 series alloy after heat treatment are superior to the 5000 series alloy, so it can be used in naval superstructures, such as compression structures and armor plates. However, the shortcoming of 7000 aluminum alloy is its poor resistance to stress corrosion, so it limits the use of this series.

This table shows the elements, properties and applications of different marine grade aluminum sheet. If you like to know marine grade aluminium sheet price, welcome to contact Haomei Aluminum directly.

Items	Alloy	Temper	Chemical element	Properties	Application
For Hull	5052	O H14 H34	Al:remainder Si:≤0.25 Cu:≤0.10 Mg:2.2~2.8 Zn:≤0.10 Mn:≤0.10 Cr: 0.15-0.35 Fe：≤0.40	Medium strength, good corrosion resistance and formability, high fatigue strength	Superstructure, auxiliary components, boat hull
	5083	O H32	Al：reminder Si：≤0.40 Cu：≤0.10 Mg：4.0-4.9 Zn：≤0.25 Mn：0.40～1.0 Ti：≤0.15 Cr：0.05-0.25 Fe：0-0.400	good weldability, corrosion resistance and low temperature performance, highest strength among non heat-treated aluminum alloys	Main structure of hull
	5086	H32 H34	Al：remainder Si：≤0.40 Cu：≤0.10 Mg：3.5-4.5 Zn：≤0.25 Mn：0.20-0.7 Ti：≤0.15 Cr：0.05-0.25 Fe：0-0.500	The weldability and corrosion resistance are the same as 5083, and the strength is slightly lower, and the extrudability is improved.	The main structure of the hull
	5454	H32 H34	Al：remainder Si：≤0.25 Cu：≤0.10 Mg：2.4-3.0 Zn：≤0.25 Mn：0.50-1.0 Ti：≤0.20 Cr：0.05-0.20 Fe：0.000-0.400	It has 22% higher strength than 5052, good corrosion resistance and weldability, general formability	Hull structure, pressure vessel, pipeline, etc.
	5456	O H321	Al：remainder Si：≤0.50 　　 Cu：3.8-4.9 Mg:1.2-1.8 Zn：≤0.30 Mn：0.30-0.9 Ti：≤0.15 Ni：≤0.10 　 Fe：0.000-0.500 Fe+Ni：0.000-0.500	It is Similar to 5083, but with slightly higher strength and sensitivity to stress corrosion	Hull and deck
	6061	T4 T6	Cu: 0.15-0.4 Mn: 0.15 Mg: 0.8-1.2 Zn: 0.25 Cr: 0.04-0.35 Ti: 0.15 Si: 0.4-0.8 Fe: 0.7 Al: remainder	It can be strengthened by heat treatment. It has high strength, but the welding seam has low strength. It is mainly used for screwing and riveting structures that are not in contact with seawater.	Superstructure, partition structure, frame, etc.
For outfitting	1050 1200	H112O H12 H24	Al：remainder Si：≤0.25 Fe：0.40 Cu：≤0.50 Mn：≤0.50 Mg：≤0.50 Zn：≤0.15 Ti：≤0.03	Low strength, good workability, good weldability and corrosion resistance, high surface treatment	Interior decoration
	1050 1200	H112O H12 H24	Cu：≤0.50 Mn：≤0.50 Zn：≤0.15 Ti：≤0.03 Fe+Si：≤1.0		Interior decoration
	3003 3203	H112O H12	Al ：remainder Si：≤0.60 Fe：≤0.70 Cu：≤0.50 Mn：1.0~1.5 Zn：≤0.10	It has 10%higher strength than 1100, good formability, weldability, and corrosion resistance	Interior decoration, top and side plates of LPG tank