Brass Round Tube Cu 62% — Precision-Cut Hollow Pipe for DIY, Fabrication & Model Making
When your project demands a material that holds tight tolerances without corroding on contact with moisture or flux, generic steel tube falls short. Makers, hobbyists, and small-shop fabricators who need a reliable hollow section for structural inserts, fluid lines, or decorative trim reach for brass round tube — and for good reason. These Cu 62% brass round tubes are drawn to consistent outer-diameter and wall-thickness dimensions, giving you a repeatable starting point whether you are cutting, bending, soldering, or threading.
Each piece is a seamless-drawn brass round pipe in Cu 62% alloy (approximately 62% copper, balance zinc), cut to a fixed 400 mm (≈ 15.75 in) length. Outer diameters span 4 mm to 25 mm (≈ 0.16 in to 0.98 in), and wall thicknesses range from 0.2 mm to 2 mm (≈ 0.008 in to 0.079 in), giving a wide selection of inner-bore sizes from approximately 3 mm to 21 mm. Variants are sold individually (1 pc) or in packs of 5 pcs.
Typical applications include model railway and RC vehicle axle sleeves, pneumatic and hydraulic prototype tubing, lamp-making and furniture hardware inserts, jewellery mandrels and tube settings, and architectural scale-model structural members. The consistent OD makes these brass round tubes easy to fit into standard collets, drill chucks, and tube-bending jigs without additional sizing.
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Compatibility note: These tubes are metric-dimensioned (OD and wall in mm). Verify your required inner diameter (ID = OD − 2 × wall) before ordering. ID values range from approximately 3 mm to 21 mm depending on the variant selected.
✅ Key Features of These Brass Round Tubes
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Cu 62% Alloy
Approximately 62% copper content delivers the corrosion resistance, solderability, and machinability that brass is valued for in precision fabrication and fluid-handling applications.
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Wide Size Range
OD from 4 mm to 25 mm with wall thicknesses from 0.2 mm to 2 mm — over 100 size combinations available, covering thin-wall decorative sections through heavy-wall structural inserts.
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Fixed 400 mm Length
Each tube is cut to 400 mm (≈ 15.75 in), a practical working length that fits most bench vises and tube cutters without pre-trimming, and leaves enough material for multiple shorter cuts.
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Consistent OD Tolerance
Drawn to a consistent outer diameter so the tube seats reliably in standard collets, drill chucks, and tube-bending jigs without additional sizing or shimming.
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Solderable & Machinable
Cu 62% brass solders cleanly with standard silver or soft solder, machines without work-hardening under normal lathe or mill conditions, and accepts taps for light threading.
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Single or 5-Piece Packs
Order 1 pc to test a size or 5 pcs for a project run — both quantity options are available for every size combination, with per-unit savings on the 5-piece pack.
📐 Technical Specifications — Brass Round Tube
| Material |
Brass Cu 62% (approx. 62% copper, balance zinc) |
| Tube Form |
Round hollow pipe (seamless drawn) |
| Outer Diameter (OD) |
4 mm – 25 mm (≈ 0.16 in – 0.98 in) |
| Wall Thickness |
0.2 mm – 2 mm (≈ 0.008 in – 0.079 in) |
| Inner Diameter (ID) |
Approx. 3 mm – 21 mm (ID = OD − 2 × wall) |
| Length |
400 mm (≈ 15.75 in / 0.4 m) |
| Available Quantities |
1 pc or 5 pcs per order |
| Surface Finish |
See variant options |
| Weight (per piece) |
See variant options (varies by OD and wall) |
❓ Frequently Asked Questions
How do I calculate the inner diameter (ID) of a specific variant?
The inner diameter equals the outer diameter minus twice the wall thickness: ID = OD − (2 × wall). For example, a 10 mm OD × 1 mm wall tube has an ID of 8 mm. All variant names follow the format OD × Wall × Length, so you can calculate ID directly from the variant label before adding to cart.
What does Cu 62% mean, and how does it affect performance?
Cu 62% refers to the copper content of the brass alloy — approximately 62% copper with the remainder primarily zinc. This composition (sometimes called CW508L or similar) offers a balance of machinability, corrosion resistance, and solderability. It is softer than steel, making it easy to cut and bend, and it resists oxidation in most indoor and light-outdoor environments without surface treatment.
Can I solder or braze these brass tubes?
Yes. Cu 62% brass solders readily with standard soft solder (tin-lead or lead-free) and silver solder. Use an appropriate flux for brass, clean the joint area with fine abrasive or flux paste, and apply heat evenly. Brazing with a higher-temperature filler is also possible. Avoid overheating, which can cause zinc fuming — work in a ventilated area.
Which wall thickness should I choose for structural versus decorative use?
For purely decorative applications (lamp trim, furniture inlay, scale models), thin walls of 0.2 mm – 0.5 mm keep weight low and are easy to cut with a hobby knife or tube cutter. For load-bearing inserts, axle sleeves, or fluid lines under light pressure, walls of 0.75 mm – 2 mm provide meaningfully more rigidity and crush resistance. When in doubt, choose a wall thickness of at least 10% of the OD for general structural use.
Are these tubes compatible with standard metric fittings and collets?
The outer diameters are metric and drawn to consistent tolerances, so they seat well in standard metric collets, ER collet chucks, and tube-bending jigs sized for the corresponding OD. For press-fit or slip-fit applications, measure your bore or collet ID and compare it to the tube OD — a light interference fit is typically 0.01–0.05 mm under the bore diameter.
Can I cut these tubes to shorter lengths at home?
Yes. The 400 mm length is easy to cut with a rotary tube cutter (recommended for clean, square ends), a fine-tooth hacksaw, or a jeweller's saw. A tube cutter leaves a slight internal burr that can be removed with a deburring tool or a few passes of a round file. For lathe users, parting off is the cleanest method and leaves a flat, square face.
Will brass corrode or tarnish over time?
Brass naturally develops a patina (surface oxidation) when exposed to air and moisture over time, shifting from bright gold to a darker amber or brown tone. This does not affect structural integrity. To maintain a bright finish, apply a thin coat of clear lacquer or brass polish after cleaning. For outdoor or high-humidity environments, a protective coating is recommended.
Is the 5-piece pack the same tube cut into 5 pieces, or 5 full-length tubes?
The 5-piece pack contains 5 individual full-length tubes, each 400 mm long, of the same OD and wall thickness. It is not a single tube cut into shorter sections. This makes the 5-piece option ideal for projects requiring multiple identical pieces or for stocking a commonly used size.
🛒 Select your Size (OD × Wall × Length) and Quantity above, then add to cart.
