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Detailed introduction and use of 3A21 aluminum tube
2019-06-10 16:33:00

1.Introduction of 3A21 aluminum tube
3A21 aluminum tube is AL-Mn alloy aluminum tube. It is the most widely used rust-proof aluminum tube. The strength of this alloy is not high (nearly higher than industrial pure aluminum), and it can not be heat-treated and strengthened. Therefore, cold processing is often used. Improved mechanical properties; 3A21 aluminum tube has high shape in the annealed state, good shape during semi-cold hardening, low shape during cold hardening, good corrosion resistance, good weldability, machinability bad.

2..3A21 aluminum tube chemical composition:
Silicon Si: 0.60
Iron Fe: 0.70
Copper Cu: 0.20
Manganese Mn: 1.0-1.6
Magnesium Mg: 0.05
Zinc Zn: 0.15
Titanium Ti: 0.10-0.20
Aluminum Al: balance

3.Mechanical properties of 3A21 aluminum tube
Tensile strength σb (MPa) ) 120-160
Conditional yield strength σ0.2 (MPa) )≥85
Sample size: all wall thickness
Note: Longitudinal mechanical properties of pipe at room temperature

4.3A21 aluminum tube usage
3A21 aluminum tube for low carbon load parts requiring plasticity and good weldability and good weldability, working in liquid or gaseous media, such as fuel tanks, gasoline or lubricating oil conduits, various liquid containers or other deep drawing Small load parts

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