Aluminum Marine Plate 5083-H321

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Aluminum Marine Plate
Alloy & Temper: 5083-H321
Standard: EN 485/573, ASTM B209, AMS 4027, AMS-QQ-A250, GB T3880, AA 35.1/2
Thickness: 3~200mm
Regular Width:1000/1020/1250/1270/1500/1520, 36.5", 48'5", 60.5", 72.5", Max width: 2600mm
Minimum Order Quantity(MOQ):7 tons per size

Alloy 5083 Aluminum Plate Sheet

Alloy 5083 aluminum plate sheet have higher strength than 5052 plate and has exceptional thermal conductivity. In the tempered condition, it retains good formability due to excellent ductility. It is highly suitable for welding and can be hardened by cold work. Because Alloy 5083 exhibits excellent resistance to general corrosion, it is used in marine applications. Since Alloy 5083 is capable of withstanding extremely low temperatures without brittleness or loss of properties, it is especially suited to the cryogenic market.

Alloy 5083 aluminum plate sheet is a non-heat-treatable 4½% magnesium, 0.15% chromium, 0.7% manganese alloy commonly available in flat rolled plate from a range of producing mills. Like all the 5000-series high magnesium alloys 5083 achieves a high strength by cold working,enabling a series of “H” tempers; 5083 is the highest strength of any of these alloys.

Corrosion Resistance

Excellent in a wide range of atmospheric environments, in food processing and architectural applications. The principal application for 5083 is marine environments. The magnesium content is more than 3½% Mg, so this alloy can be susceptible to stress corrosion cracking, which limits its application temperature to below 65°C and also limits the amount of cold work to ¼ Hard.

Heat Treatment

Alloy 5083 is not hardenable by heat treatment. It can be significantly hardened by cold work (eg by cold rolling) and various “H”tempers are produced – most commonly H32 (¼ Hard) or the similar strength marine tempers H116 and H321 – as well as the soft annealed Temper O condition.

The alloy spontaneously age-softens at room temperature immediately after cold work but will eventually reach a stable condition; all flat rolled mill products are supplied with stable properties. This is usually achieved by a stabilisation thermal treatment as the last operation which results in the H32 or H321 tempers. H112 temper is strain hardened as the final operation, again to quickly reach the required stable temper properties. To soften Alloy 5083 it can be annealed by heating to 345°C, hold until uniform temperature then cool; the rate of cooling is not important.

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