3A21 aluminum sheet
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3A21 aluminum sheet is a typical 3 series Al-Mn anti-rust alloy, the A here represents an improvement on the original pure aluminum, however, 3A21 aluminum sheet is also a non-heat treated alloy, and can only be enhanced by cold machining. Besides, due to the addition of the main alloy Mn, 3A21 aluminum alloy has the characteristics of excellent corrosion resistance, good formability and weldability, and appropriate strength, etc., so it is widely used in both these properties and the conditions requiring higher strength than the 1-series alloy, or the low-load parts working in liquid and gas medium, etc.
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