Aluminum Coil 3A21 3203 A93203 AlMn(B)

3A21 Aluminum Alloy is an Al-Mn series alloy. 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.

Alloy Number: 3A21

Temper: O, H12, H14, H16, H18, H24

Thickness: 0.2mm – 6.35mm 

Width: 300mm-2600mm

Inner Diameter: 505mm, 508mm, 305mm, 76mm; Maximum OD: 2000MM,

Standard width: 1000mm, 1200mm, 1220mm, 1250mm, 1500mm,

Thickness tolerance: +/-0.02mm, Width tolerance:  -0 / +2mm;

3000 Series Alloy (Generally called Al-Mn Alloy, Mn is used as main alloy element)


3003 3004 3005 3102 3105


O/H111 H112 H12/H22/H32 H14/H24/H34 H16/H26/
H36 H18/H28/H38 H114/H194, etc.


Thickness≤30mm; Width≤2200mm Length≤12000mm OR Coil (C)


Decoration, heat-sink device, external walls, storage, sheets for construction, etc.


Good rust resistance, not suitable for heat treatments, good corrosion resistant
performance, well welding property, good plasticity, low strength but suitable
for cold working hardening



Contact: Ansel

Phone: +86 18221824908


Add: Tianxiang Road, Huishan District, Wuxi City, Jiangsu Province