Aluminum Sheet 3A21 3203 A93203 AlMn(B)

3A21 aluminum plate is a widely used anti-rust aluminum. It's strength is not high and cannot be strengthened by heat treatment. Therefore, cold working methods are often used to improve its mechanical properties. It has high plasticity in the annealed state. The plasticity is good during semi-cold work hardening, and the plasticity is low during cold work hardening, with good corrosion resistance, good weldability and poor machinability.


3A21 aluminum sheet is also a typical 3 series Al-Mn antirust alloy, but it's not difficult to sfind that it has the letter A in its name. In fact, the A here represents an improvement on the original pure aluminum, so as to develop 3A21 aluminum instead of aluminum 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 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.

3A21 Aluminum Sheet Features:

Excellent Corrosion Resistance. The 3A21 aluminum sheet is close to the corrosion resistance of industrial pure aluminum, has good corrosion resistance to atmosphere, fresh water, seawater and some acids, etc.

Better Plasticity. The plasticity of 3A21 aluminum alloy is very high in the annealing state, good in the case of semi-cold hardening, and low in the case of cold hardening.

Good Weldability. 3A21 aluminum sheet has good spot welding, gas welding, argon arc welding and other welding effects.

Mechnical Properties. 3A21 aluminum sheet tensile strength σb (MPa) is 120-160, conditional yield strength σ0.2 (MPa)≥8, elongation δ10≤2%.



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