uncleflo
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11 Tips for Welding Aluminum in the Shipbuilding Industry
Saved by uncleflo on December 20th, 2019.
Aluminum alloys are lightweight and corrosion-resistant in marine environments, making the superior material for use in the shipbuilding industry. There are two aspects that make general aluminum welding different from welding steel in the shipbuilding industry, and both are related to the fact that much of the welding is performed outdoors: Both aspects will be discussed in more detail on the next few pages. Know Which Aluminum Alloy You Are WeldingIt isn’t enough to know that you are welding aluminum. Welding professionals have to know which alloy is about to be welded, and they have to know the correct filler metal to use. The most common alloys used in shipbuilding are the Al-Mg 5XXX sheet alloys and the Al-Mg-Si 6XXX extrusion alloys, primarily because of their excellent resistance to corrosion.
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Marine Grade Metals | Metal Supermarkets UK - Stainless Steel, Aluminium, Bright, Black, Engineering, Bronze, Copper, Brass, Tool, Galvanized
Saved by uncleflo on December 19th, 2019.
When a metal is exposed to underwater or wet environments, marine grade metals may be necessary to prevent the material from failing under the conditions. To be considered a marine grade, the material must be able to resist corrosive effects that are common in a water environment. To achieve this, special alloying elements are added to these grades in order to defend against corrosion. Marine grades can be found in most of the metal types, which include aluminium, stainless steel, brass, bronze, copper and carbon steel. Most carbon steel is not well-suited for marine environments, however, there are several marine grade carbon steels available. AH36, DH36, and EH36 are all examples of commonly used marine grade carbon steels approved by the American Bureau of Shipping. These grades will have slightly more alloying elements such as manganese and chromium compared to their ASTM grade counterparts, which helps achieve higher strength and more corrosion resistance. There are also marine grades of engineering steel as well. Grades MD, ME, MF, MG, and others can provide the strength that normal alloy steel is known for, and have also been approved by the American Bureau of Shipping for use in shipbuilding applications.
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Aluminium Grades Overview | 1st Choice Metals
Saved by uncleflo on December 19th, 2019.
The 1st Choice for Aluminium, Stainless & Brass online. Magnesium is the main element used in the composition of the 5000 series grades of aluminium. The 5000 series grades of aluminium are non heat-treatable alloys. The 5000 series grades also have excellent resistance to corrosion caused by saltwater, for this reason they are often referred to as the Marine Grades of aluminium. Grade 5083 has the highest strength of all of the non heat treatable alloys, although it is not as strong or as hard as the more common grade 6082. Grade 5083 is primarily available in plate form, and is most commonly available in O condition. Grade 5754 is a medium strength alloy. For comparison it is not a strong as grades 6082 or 5083, but 5754 is stronger than grade 5251. Grade 5754 is most commonly used to produce aluminium 5 bar treadplate (often referred to as aluminium chequer plate). Grade 5251 is a medium strength alloy, usually supplied in sheet form, and is most commonly supplied in temper H22. Previously known as NS4, grade 5251 has many similar attributes to grade 1050 aluminium sheet and is probably the 2nd most popular grade of aluminium sheet used in the UK today.
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5052 Aluminium Alloy | Smiths Metal Centres Ltd
Saved by uncleflo on December 19th, 2019.
5052 aluminium a higher strength non-heat treatable alloy. When annealed it is stronger than 1100 & 3003. The alloy benefits from a medium to high fatigue strength making it an excellent choice for use in structures which are exposed to excessive vibrations. 5052 also offers very good resistance to corrosion, especially in marine atmospheres. With good weldability and formability characteristics, the alloy can be used in a wide range of applications.
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Aluminium 5052 Bar, Sheet, Plate - Calico Metal
Saved by uncleflo on December 19th, 2019.
Aluminium 5052 Bar, Sheet, Plate, Tube Fittings, 5052 Aluminium Plates, UNS A95052 Aluminum 5052 Bar, 5052 Aluminum Sheets, 5052 Aluminum Tubes, 5052 Aluminum Bars, 5052 aluminium alloy sheet, 5052 aluminium alloy bars, Manufacturer, Suppliers, Exporters, Mumbai, India. Aluminum 5052 is one of the higher strength non-heat treatable alloys (Annealed it is stronger than 1100 and 3003). Alloy 5052 has excellent characteristics with a high fatigue strength it is used for structures which are subject to excessive vibrations. As 5052 also has excellent corrosion resistance, especially in marine atmospheres and is therefore commonly used in boats, marine components, fuel and oil tubing. Aluminum 5052 is stocked by 120 North American distributors and produced by 46 large mills. Distributors will offer small quantity buys while mills will generally only sell large quantities, with delivery times anywhere from 10 to 50 weeks depending on size and form required. This material is stocked primarily in Flat Rolled Products by 111 distributors but is also available to a lesser extent in Tubular Products, Wire Products, Structurals, and Scientific Forms.
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Torsion of Open Thin Wall Sections
Saved by uncleflo on September 2nd, 2014.
The treatment of torsion in most Mechanics of Materials textbooks is uneven. While circular cross sections are analyzed in detail (sometimes too thoroughly), the coverage of non-circular sections is typically relegated to “advanced material” covering 4-5 pages. (In this respect Beer-Johnston- DeWolf is somewhat better than Vable, who totally omits Open Thin Wall sections)
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