Brass Tubes ROUND PIPE Cu 62% OD 2mm 3mm 4mm 5mm 6mm To 25mm Length 300mm 0.3m

Start with the outer diameter your application requires — for example, a tube that must slide inside a 6 mm bore needs an OD of 5.5 mm or less. Then select wall thickness based on the load or pressure the tube must handle: thinner walls (0.15–0.3 mm) suit lightweight model frames and wire guides, while thicker walls (0.75–3 mm) are better for structural spars or fluid-carrying applications. The inner diameter equals OD minus twice the wall thickness.

Yes, Cu 62% brass is ductile enough for moderate bending. For thin-wall tubes (under 0.5 mm wall), use a close-fitting mandrel or spring insert to prevent collapse at the bend. Thicker-wall tubes (0.75 mm and above) can often be bent with a quality tube bender without a mandrel for gentle curves. Annealing (heating to dull red and quenching in water) softens the tube further if tight-radius bends are needed.

Cu 62% brass performs well in ambient indoor conditions and resists light moisture. In persistently humid or salt-air environments, brass can develop a green patina (verdigris) over time. For outdoor use, apply a clear lacquer or wax coating to the surface. For marine or chemical-exposure applications, consider a higher-copper alloy or stainless steel alternative.

Yes. Most hobby-grade rotary tube cutters rated for non-ferrous metals (aluminum, brass, copper) will cut these tubes cleanly. For ODs under 2 mm, a fine-tooth jeweler's saw or a sharp scalpel with a cutting block gives cleaner results than a rotary cutter. Always deburr the cut end with a reamer or fine file before assembly.

Brass solders readily with both soft solder (Sn60/Pb40 or lead-free Sn99) and silver solder. Use a flux appropriate for brass — a liquid or paste flux designed for copper alloys works best. Clean the joint area with fine abrasive paper before applying flux to ensure a strong, void-free joint. For structural joints, silver solder (45% silver) provides significantly higher shear strength than soft solder.

Each OD increment represents a distinct tube size. A 5 mm OD tube will not fit inside a 5 mm bore — you need an OD smaller than the bore ID. If you need a tube to slide inside another tube from this range, select an OD that is at least 0.2–0.4 mm smaller than the outer tube's inner diameter to allow clearance. Use the variant option format (OD × Wall × Length) to calculate the exact ID before ordering.

Each variant represents one (1) piece of 300 mm brass tube in the selected OD × wall thickness combination. If you need multiple pieces of the same size, adjust the quantity in your cart before checkout. Bulk quantities are available — contact us for volume pricing on orders of 10 or more pieces of the same variant.