Steel tubing with bright surface, direct chrome and zinc plating, no prior polishing.
Delmàs PREMIUM range is precision calibrated welded steel tubing with rigorous outer diameter control and a bright, pore-free surface from the mill, ready for direct surface treatments with no intermediate preparation step.
When the tubing is the visible part, the surface is everything.
When steel tubing is the visible part of a product or is going to receive a galvanic treatment — chrome, zinc and/or brass plating — the quality of its surface is everything. A pore, a rolling mark or a minimal irregularity is magnified in the chrome bath and ruins the final finish. The result: visual rejects, process repetition and extra cost that nobody budgeted for.
PREMIUM range solves this problem at source. The tubing arrives at your production line with the surface it needs to go directly into the bath — unpolished. Unprepared. Without losing time or material.
From steel coil to tubing ready to chrome-plate.
Four internally controlled steps: no subcontracted operation between the coil and the pallet that leaves for your plant.
Raw material
Steel coil selected for grade and surface finish from the mill.
Precision welding
Controlled ERW process, certified on every batch. Weld seam adjusted to the tenth of a millimetre.
Outer calibration
Outer dimensional control with ±0.05 mm tolerance on nominal diameter.
Certified delivery
Batch with certificate of steel composition, mechanical properties and verified dimensions.
The precision the standard market cannot offer.
PREMIUM range precisely controls the tubing outer diameter and guarantees a bright, clean, pore-free outer surface ready for direct galvanic treatments. We can manufacture the tubing at the exact diameter your application requires.
| Parameter | PREMIUM Specification | |
|---|---|---|
| Manufacturing process | Precision welded and calibrated steel tubing, outer diameter ±0.05 mm | |
| Outer diameter (OD) | 3 mm – 13 mm (including non-standard sizes) | |
| Dimensional control | Outer diameter and tolerance adjusted to each client's specification and specific requirements | |
| Outer surface finish | Bright, pore-free, suitable for direct galvanic treatment | |
| Wall thickness | 0.40 mm – 2.00 mm | |
| Standards | EN 10305-3 · ASTM 513 Type 2 · ASTM 513 Type 4 · SAE J526 | |
| Supply formats | Standard length · Coil · Cut-to-exact-length · Finished part | |
| Compatible surface treatments | Chrome plating · Zinc plating · Brass plating · Nickel plating | |
| Standard | Market | What it defines for PREMIUM |
|---|---|---|
| EN 10305-3 | Europe | Precision steel tubing with calibrated outer diameter. Defines dimensional tolerances of the outer diameter, mechanical properties and outer surface quality. The reference standard for applications in furniture, lighting and vehicle interior components in the European market. |
| ASTM 513 Tipo 2 | USA / global | Electric Resistance Welded (ERW) tubing with bright inner finish, standard tolerance. Approximate equivalent to the PREMIUM level in the North American market. Required by American OEMs and their supply chains. |
| ASTM 513 Tipo 4 | USA / global | ERW tubing with tighter dimensional tolerances, bright finish. Higher level of dimensional control within the ASTM 513 standard. For applications requiring greater precision in the outer fit. |
| SAE J526 | Automotive | Society of Automotive Engineers standard for low-pressure welded steel tubing. Widely required in the American automotive supply chain and its European Tier 1 suppliers. |
The product certificate is issued with every delivery and includes steel composition, batch mechanical properties, verified dimensions and the applicable standard as ordered. It is not an additional document: it is our delivery standard.
Without PREMIUM range
- Standard steel tubing arrives with a dull surface and variable porosity
- A prior polishing step is required before the galvanic bath
- Polishing adds process cost, time and uniformity risk
- Remaining imperfections generate visual rejects in the final finish
- Higher rate of material waste and production time
- Your design needs 8.25 mm. The market has 8.00 mm. Your design adapts to the market.
With PREMIUM range
- Tubing arrives with a bright, pore-free surface straight from the factory
- Goes directly into the chrome, zinc or other treatment bath
- Completely eliminates the polishing step and its associated cost
- Zero visual rejects from base tubing surface imperfections
- Reduction in cycle time and total process cost
- Your design needs 8.25 mm. We manufacture 8.25 mm. The market adapts to your design.
Adjustment to the tenth of a millimetre, in diameter and wall thickness.
Standard steel tubing is manufactured to an outer diameter tolerance of ±0.12 mm. At Delmàs we achieve ±0.05 mm — and we go further still: we match the exact tolerance each application requires. If your design calls for 8.25 mm instead of the standard 8.00 mm, we manufacture 8.25 mm. We do not work from what is in a catalogue: we work from what is on your drawing.
Four finishes, straight into the bath.
The bright surface from the mill allows PREMIUM tubing to be treated directly with the four standard galvanic finishes with no intermediate preparation.
Four formats, adapted to your process.
The choice of format has a direct impact on your material scrap, your production line continuity and the total process cost.
Standard length
Standard-length bars for conventional cutting and machining processes at the client's plant.
Coil
Continuous coil for automated production lines. Drastically reduces scrap compared to bars and increases process flexibility.
Cut-to-length
Exact length with tight tolerance. Eliminates cutting at the client's plant, the associated scrap and the logistics of offcuts.
Finished part
PREMIUM tubing as the base for a transformed part: cutting, bending, machining, punching. Ready to assemble.
Where PREMIUM range changes the rules of the process.
Designer lamp arms and columns · Premium kitchen and bathroom fittings · Office furniture and shelving · Vehicle interior components with chrome finish.
Engine cooling circuits · Air conditioning systems · Engine oil circuits · Industrial HVAC systems.
Full adaptability in diameters, wall thicknesses and mechanical parameters.
Delmàs PREMIUM tubing is used in sectors where surface finish and outer diameter precision are decisive for the function or aesthetics of the finished product.
In the mobility sector, PREMIUM range delivers the bright surface that visible elements need and the outer precision that guarantees the correct fit across all subsectors where the tubing is part of the finished product.
In automotive, PREMIUM range addresses both fluid management applications — where precision welded tubing replaces seamless — and components where surface finish and dimensional fit are critical.
The home sector is where PREMIUM range shows its greatest differential value: the tubing is the visible part of the product and goes directly into the galvanic bath. The bright surface from the mill eliminates prior polishing and guarantees a chrome finish without imperfections.
In engineering, PREMIUM range provides the outer precision and surface quality that closure systems, low-pressure hydraulics and precision metalwork need to perform correctly from the first cycle.
We manufacture the part your product needs.
At Delmàs we do not limit ourselves to manufacturing round tubing in standard lengths. As manufacturers with our own transformation capability, we deliver from raw material to finished part ready to assemble — with the exact geometry, finish and dimensions your application requires.
Special profiles
Square, rectangular or oval tubing manufactured from our precision welding process, maintaining the same bright surface control that defines PREMIUM range.
Decorative finishes
Screen printing, engravings, textures and marks incorporated during the manufacturing process, with no additional operations at the client's plant.
Transformation
Exact-length cutting, controlled-radius bending, hole punching and end tapering — reducing operations and suppliers in your chain.
Finished part
From bright tubing to part ready to chrome-plate: finished component ready to go directly into the galvanic bath.
As manufacturers, our commitment does not end when the tubing leaves the welding machine: it ends when the part we deliver arrives at the chrome bath without a single imperfection.
Manufacturers who cannot afford a single compromise on the finish.
Delmàs PREMIUM tubing is part of the products of leading manufacturers who cannot afford any compromise on surface finish or dimensional precision.
Send us your specification. We will send you a physical sample for you to validate in your process.
No commitment, no minimum quantities. PREMIUM tubing in your hands, ready to validate in your production line.
- Technical response within 24 hours
- Physical sample to your exact specification
- Technical datasheet available