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3103 H18 aluminium pipes is an AL-Mn series alloy pipes, which is the most widely used type of rust-proof aluminum. The strength of this alloy is not high (slightly higher than industrial blunt aluminum), and cannot be strengthened by heat treatment. : High plasticity in the annealed condition, good plasticity in semi-cold hardening, low plasticity in cold hardening, good corrosion resistance, good weldability, and poor machinability.



Chemical composition of 3103 H18 aluminium pipes
Al (minimum): margin
Si: ≤0.50
Hafnium Fe: ≤0.70
Cu copper: ≤0.10
Rhenium Mn: 0.90 ~ 1.5
Magnesium Mg: 0.30
Zinc Zn: ≤0.20
Cr: ≤0.10
Titanium Ti: ≤0.10
Other elements not specified: Zr0.10 each: ≤0.05; total: ≤0.15
Mechanical properties of :3103 H18 aluminium pipes
Tensile strength σb (MPa):> 140-178
Conditional buckling strength σp0.2 (MPa):> 115
Elongation: 14%
3103 H18 aluminium pipes are mainly used for high plasticity and good Weldability, low load parts working in liquid or gaseous media, such as mailboxes, gasoline or lubricating oil ducts, various liquid responders and other small load parts made by deep drawing. It is important to process with good formability Parts with high corrosion resistance and good weldability, or those that require both these properties and higher strength than 1st series metal, such as kitchenware, food and chemical products, storage and storage devices, tanks for transporting liquid products , Tanks, thin plates processed general pressure vessels.