Profile: Mingtai Aluminum CO.,LTD. specializes in aluminum processing services. Our main products are aluminum sheets, plates, coils, foils from 1000 series to 8000 series. 3A21 aluminum sheet is also a typical 3 series Al-Mn antirust alloy. Similarly, 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 corrosion resistance, formability, weldability, and appropriate strength. 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.