Precision steel tube for automotive.
From prototype to serial production.
The automotive sector is the most demanding in industry: homologations, quality audits, long-term contracts and zero process tolerances. As specialist manufacturers of precision welded steel tube, Delmàs is the perfect partner for the Tier 1 suppliers and global OEMs when large manufacturers cannot offer what their design demands.
In automotive, precision steel tube is everywhere: in seat mechanisms, in sun visors that must route the electrical cable to its destination, in the gas strut that keeps the boot lid open, in the engine cooling circuit, in the sunroof, in the boot blind mechanism. In every one of those applications, the tube is not a generic raw material — it is a precision technical component where one tenth or hundredth of a millimetre determines whether the product achieves the required functionality or not.
Our differentiator in automotive is twofold: the technical precision that meets the most demanding standards (EN 10305, ASTM 513, SAE), the coil supply format that eliminates scrap on automated lines and reduces total process cost by 10–15%, and adaptation to the specific functional requirements of each client.
Technical precision validated by the world's most demanding clients.
The automotive technical challenges Delmàs solves.
Scrap on automated lines
Continuous automated manufacturing lines generate end-of-bar scrap with standard-length tube. At automotive volumes, that scrap represents between 10% and 15% of material.
Homologation and traceability
Global OEMs require product certification, full material traceability and compliance with international standards on every delivery. Not as an optional document: as a contractual requirement.
Seamless tube cost
Automotive cooling circuits and gas springs have historically used seamless extruded tube. Its cost is 40–80% higher than the equivalent precision welded tube, with uncertain and unpredictable lead times.
We manufacture for the entire value chain of automotive.
Automotive is not a single market: it is a chain of specialists. We manufacture for every link in that chain — from the global Tier 1 supplying major OEMs to the gas spring specialist who needs the perfect cylinder bore.
Vehicle interior structures — seats, headrests, panels and blind mechanisms — demand dimensional precision and surface finish that meets the strict standards of global OEMs. Coil supply is the standard format for automated lines.
Engine cooling circuits and bonnet and boot gas struts require a perfect bore for piston sealing and sliding. Seamless tube has been the historical standard — but PRECISE range replaces it technically at a much lower cost.
Delmàs precision steel tube is present throughout the vehicle chain beyond passenger cars: trucks, caravans and agricultural machinery share the same demands for dimensional precision and supply reliability.
Precision steel tubing applications in automotive.
Headrest guides · Seat structures · Boot blind mechanism · Door lock cables
Bonnet and boot gas struts · Seat dampers · Sunroof gas struts · Pneumatic actuators
Engine cooling circuits · Oil dipstick tubes · A/C tubing
Which range for each of automotive?
For: visible structures, coil for line.
- Bright finish · Calibrated OD
- EN 10305-3 · ASTM 513 T2/T4
- SAE J526 · Coil supply
For: mechanisms, guides, cables.
- OD + ID control · Bead ≤ 0.15 mm
- EN 10305-3/2 · SAE J525
- ASTM 513 T4 · Coil
For: gas springs, cooling.
- Mirror bore · OD 8–25 mm
- EN 10305-2 · ASTM 513 T5/T6
- Replaces seamless · −40–80% cost
Is your line scrap above 10%? Are you paying the seamless tube price? Does the tube not match your functional requirement?
Tell us about your process. We calculate the real saving.
- Technical response within 24 hours
- Physical sample to your exact specification
- Product certificate with every delivery
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