304 Seamless Stainless Steel Hexagonal Tube
This TP304 seamless hexagonal tube is cold drawn from a pierced seamless round billet, so there is no weld seam along the body wall. That makes it the preferred input for hex sockets, tool shafts and precision machinery parts where a welded tube would fail under torsion or internal pressure.
We supply the standard size 19mm across flats from stock, and draw the full range from 8mm to 60mm AF with wall thickness from 1.0mm to 6.0mm. Tubes are delivered bright annealed with a smooth, oxide-free surface that can be polished, machined or plated directly without an extra pickling step.
Key Specifications
| Material Grade |
304 / 304L (EN 1.4301 / 1.4307) |
| Standard |
ASTM A511 / A511M, ASTM A269, EN 10216-5 |
| Section Shape |
Hexagonal, cold drawn seamless |
| Across Flats |
8mm - 60mm |
| Wall Thickness |
1.0 - 6.0 mm |
| Length |
3 - 6 m, random or fixed length, cut to size available |
| AF Tolerance |
±0.05 mm |
| Surface |
Bright annealed, pickled, or polished on request |
| Straightness |
Max 1 mm per meter |
| Chemical Composition |
C ≤ 0.08%, Cr 18-20%, Ni 8-10.5%, Mn ≤ 2%, Si ≤ 0.75% |
Why Choose Seamless Cold Drawn Hex Tube
- No seam, no failure line - the wall is homogeneous around the full hexagon, so the tube holds torque and pressure that split welded hex tube at the seam.
- Sharp, accurate corners - cold drawing through a hex die produces true flats and consistent corner radii, giving a better fit inside hex sockets and wrenches.
- Tight AF tolerance - held to ±0.05 mm so the tube slips into mating parts without secondary sizing.
- Bright annealed surface - oxide-free finish is ready for plating, turning or laser cutting.
- Full traceability - each lot comes with an EN 10204 3.1 mill test certificate and heat number marked on the bundle.
Applications
Hexagonal seamless tube is used for hex socket blanks, spanner and wrench shafts, valve stems, pump shafts, furniture fittings, sanitary hardware, and structural parts where a flat drive surface is required at both ends.
Processing Services
Cutting to length, chamfering, CNC turning, drilling, bending and thread cutting can be arranged on the same order. Send us a drawing and we will quote the finished part instead of the raw tube.
Packing and Delivery
Tubes are packed in woven bags with plastic end caps, then in wooden cases or steel-strip bundles for sea freight. Standard export packing protects the bright surface from scratches during transit. Delivery is 5-10 days for stock sizes and 20-25 days for special AF sizes and wall thicknesses.
FAQ
Q: Is this tube welded or seamless?
A: Seamless. It is cold drawn from a pierced round billet, with no longitudinal weld seam.
Q: What is your minimum order quantity?
A: 1 ton per size. Mixed sizes can be combined into one container load.
Q: Can you supply 316L hex tube?
A: Yes, 304, 304L, 316L, 321 and 310S are all available in the same size range.
Q: Do you provide samples?
A: Short cut samples of stock sizes can be supplied for evaluation; freight is on the buyer's account.
Tell us the across-flats size, wall thickness and length you need, and we will confirm stock availability and the best price within one working day.
Your message must be between 20-3,000 characters!
English
