Aluminum 5083

This material offers the highest strength of all non-heat-resistant aluminum alloys and is used by many military and commercial vessels.
The entire structure of the hull, including the keel and carpentry, Morningstar boats are made with 5083 marine grade aluminum. Many similar size boats on the market today use 5052 aluminum. Because 5052 aluminum is much easier to train and work with, 5083 aluminum offers tensile strengths and ultimate strength. 50% greater elasticity than aluminum 5083. (source: 1)
 
Tensile strength is the maximum stress that a material can withstand when stretched or pulled before breaking.
 
The elastic limit is the stress at which a material begins to deform plastically. Once the yield strength is reached, some of the deformation will be permanent and not reversible.
In practice, this means that the same boat made of 5083 can withstand greater stress in a collison before cracking or deforming, than a boat made of steel, fiberglass or alloy. aluminum 5052.
 
Aluminum 5083 also has excellent weldability. According to ESAB (a leading manufacturer of welding equipment), compared to the respective base alloy, 5083 welded aluminum only loses 7% of its tensile strength, while 5052 welded aluminum is between 19% and 36%. (source 2) Aluminum such as 6061 may have a loss of strength of about 80% after welds. (source 3)
 
With more than 20 years of experience in metal forming and significant investment in capital goods, we have the ability to handle materials that can be difficult to handle for smaller or less experienced manufacturers.
 
The certificate issued by DNV (Det Norske Veritas) certifying the use of 5083 aluminum plates by Morningboats for the hull structure is available on request.
sources:
[1] SheetandPlate (from: www.alcoa.com)
[2] How does welding affect the HAZ of the weld (from: www.esabna.com)
[3] 6061 aluminum alloy (from: www.wikipedia.org)