Brass Round Tube Pipe – Hollow Rod for Scale Models & DIY Crafts, OD 2–8mm

Start with your required outer diameter (OD) to ensure the tube fits your assembly slot or sleeve. Then choose the length — 200mm (≈7.9") works well for smaller sub-assemblies, while 300mm (≈11.8") suits longer structural runs. You can always cut to length with a fine-tooth saw or tube cutter. If you need a specific wall thickness, subtract the ID from the OD and divide by two — for example, the 3×2mm variant has a wall thickness of 0.5mm.

Brass (typically C26000 cartridge brass or equivalent) generally has a tensile strength of around 300–500 MPa depending on temper. For scale model and light craft applications these tubes are more than adequate. They are not rated for structural load-bearing use in full-scale construction.

Brass has good natural corrosion resistance and performs well in most indoor and mildly humid environments. For prolonged outdoor exposure, applying a clear lacquer or brass sealant is generally recommended to prevent tarnishing. These tubes are not intended for marine or highly corrosive environments without additional protection.

Yes — the outer diameters follow standard metric sizing (2mm, 3mm, 6mm, 8mm OD), so they are generally compatible with metric bushings, sleeves, and hobby fittings. Always verify the tolerance of your specific fitting, as hobby-grade components can vary by ±0.05–0.1mm.

Yes. Brass solders and brazes readily with standard rosin-core solder or silver solder. It is a popular choice for model builders precisely because of its excellent solderability. Use appropriate flux for best results and avoid overheating thin-wall variants to prevent distortion.

For 1:72 to 1:48 scale aircraft models, the 2mm or 3mm OD tubes are typically used for gun barrels, pitot tubes, and exhaust stacks. For 1:35 or 1:24 scale vehicle models, 3mm–6mm OD tubes are commonly used for axles, exhaust pipes, and structural rods. The 300mm length gives you more flexibility to cut multiple pieces from a single tube.

Brass tubes can be bent carefully using a tube bender or by filling the tube with fine sand before bending to support the walls. Thin-wall variants (0.5mm wall) are more prone to kinking if bent without support. For tight-radius bends, annealing the tube with gentle heat first is generally recommended to improve ductility.