About Us
3S S.r.l. specializes in precision stainless‑steel strips and builds its strengths—such as flexibility and industry expertise—on a strong integration between its Italian site in Assago (MI) and the industrial partner in Germany, R. Kretzschmann GmbH.
- 2 production sites: Germany (Birkenfeld) and Italy (Assago)
- Extensive sourcing and qualified selection of raw materials
- Dedicated solutions and fast response times
Product Range & Capabilities
| Parameter | Range | Remarks |
|---|---|---|
| Thickness | 0,05 – 1,00 mm | Other thicknesses on request |
| Width | 3 – 1250 mm | Slit edges: sheared or deburred |
| Finish | Annealed 2R / BA • Temper rolled 2H | Calibrated mechanical properties |
| Format | Strips • Narrow strips • Spools • Sheets | Sheets up to 1000 mm |
| Mother coil | up to 6–8 kg/mm | ID 300/400/500 mm |
| Spools | from15 kg to 1500 kg | Traversal or parallel winding |
Alloy range: wide stock of austenitic and ferritic grades; nickel and titanium alloys available on request.
Spools (Reels) and Narrow Strips
Spools ensure continuous feeding with stable pay‑off, reducing machine downtime. Thin strips or narrow strips are suitable for operations that do not require continuous feeding.
- Inner/outer diameter: customizable according to width and thickness
- Winding: traverse‑wound or parallel, direction on request
- Traceability: label with batch, grade, dimensions, finish
Quality, Certifications and Traceability
- Material certificates (e.g. 3.1) and process certifications (e.g. ISO 9001) on request.
- 100% dimensional inspection on critical parameters (thickness, width, edges).
- Supply compliant with EN/ASTM specifications and specific industry requirements.
- Packaging with protective films and separators when necessary.
Sectors and Applications
- Automotive & e‑mobility (springs, shielding, terminals)
- Electronics & telecommunications (EMI/RFI, shims, contacts)
- Non‑implantable medical (components, thin strips)
- Food & chemical (corrosion‑resistant strips)
- Tools & stamping
- Furniture, light construction
Quick Guide: How to Select Precision Stainless‑Steel Strip
- Define the intended use: what will you do with the strip?
- Choose the alloy based on environment (corrosion, temperature) and required mechanical properties.
- Specify dimensions (thickness, width, tolerances).
- Select the finish: 2R‑BA or 2H (specify hardening level).
- Choose the supply format: master coil, slit coil, narrow strip, spool or reel.
FAQ
What is the difference between a coil, strip, and spool?
A coil is the mother coil; a strip is slit to the required width; a spool is a rewound strip for automated lines.
What tolerances can you guarantee?
Tolerances according to EN/ASTM standards or customer specifications, with the possibility of “tight” tolerances for critical applications.
Do you offer 2R‑BA and 2H finishes?
Yes, for 2H we offer a wide range of mechanical properties.
Do you supply spools?
Yes, with customizable diameters and winding methods.
What's the difference between coils, slit coils, narrow strips and spools?
What are stainless steel spools (ribbon on reels)?
Which finishes / tempers do you supply (2R/BA, 2H)?
What tolerances can you guarantee on precision strip?
Applications
- Gaskets and spiral‑wound gaskets
- Heating elements
- Springs
- Flexible welded and seamed hoses
- Medical
- Electronics and connectors
- Insulating spacers for glass units
- Flexible chimney flues
- Stamping
- Trowels
- Hose clamps
- Heat exchangers
Available Grades(AISI) – Summary
| Lega | Tipo | Caratteristiche | Applicazioni tipiche |
|---|---|---|---|
| AISI 301 | Austenitic | Good formability, hardenable | Springs, clips, shielding |
| AISI 304 / 304L | Austenitic | Universal, excellent corrosion resistance | Appliances, industrial strips |
| AISI 305 | Austenitic | Excellent formability, very low work‑hardening, high ductility | Electronics, automotive, kitchen tools, deep drawing |
| AISI 309 | Austenitic | Oxidation and heat resistance (≈ 1035–1100°C) | Furnace components, heat exchangers |
| AISI 316L | Austenitic | High chloride resistance | Chemical, marine, non‑implantable medical |
| AISI 316Ti | Ti‑stabilized Austenitic | Stabilized 316, excellent resistance to intergranular corrosion | Welded tanks/pipes, hot‑processing systems |
| AISI 321 | Ti‑stabilized Austenitic | High‑temperature resistance | Exhausts, thermal applications |
| AISI 430 | Ferritic | Economical, magnetic | Decorative, internal components |
Other alloys and metallurgical conditions available on request.
Request a Quote
Specify alloy, thickness, width, finish, edge condition, and format
(coil / strip / liner / spool).
We will reply promptly.