3003 Cold Drawn Round Aluminum Tube for Heat Exchangers, Condensers and Fluid Lines

Product Overview

The 3003 cold drawn round aluminum tube is a drawn tube in a manganese-alloyed aluminium grade, supplied in round section for heat transfer and fluid handling work. Cold drawing gives a consistent outer diameter, a controlled wall and a smooth bore, which matters when the tube has to fit a fixed header, a machined fitting or a coil former. The tube can be cut, bent and end-formed, so it suits both straight runs and shaped assemblies.

Material and Temper

The tube is made from 3003 aluminium, an alloy that combines good corrosion resistance with moderate strength and excellent formability. The manganese addition raises strength compared with commercially pure aluminium while keeping the ductility needed for bending and flaring. This balance makes the grade a common choice for tubing that carries fluids, transfers heat or works in mildly corrosive environments.

Cold Drawn Dimension Control

Cold drawing pulls the tube through a die at room temperature, which improves the dimensional accuracy and the surface quality of the finished section. Wall thickness stays even around the circumference, and the bore remains round, so a mating part seats correctly. Tubes can be supplied in a range of outside diameters and wall thicknesses, and cut to the lengths the buyer needs for the assembly.

Surface and Bore Condition

The outside surface can be supplied in mill finish or with a cleaned, bright appearance. The bore is kept free of drawing residue and loose particles, because contamination inside a tube can affect a fluid system or a heat transfer circuit. Where the tube will be bent tightly, a softer condition helps avoid cracking at the bend, and a mandrel or filler can be used during bending to keep the section round.

Typical Applications

• Heat exchanger coils, condensers and evaporator tubing
• Fluid transfer and return lines in equipment and machinery
• Refrigeration and air-conditioning circuits
• Instrumentation, pneumatic and low-pressure lines
• General fabrication, frames and formed tubular parts

Ordering Information

Please state the outside diameter, wall thickness, cut length, quantity and required surface condition when asking for a quotation. Bending radius, end forming and the number of pieces per bundle can be agreed with the supplier, since they depend on how the tube will be installed. Drawings, samples or a specific tolerance table can be reviewed before an order is placed.