Modern production lines in the food industry and advanced medical devices require components with absolute resistance to material degradation. The choice of the right wire grade and surface finishing process directly impacts the safety of both consumers and patients.
Stainless steel springs designed for the medical and food sectors are specialized elastic components made from austenitic or precipitation-hardened alloy steel grades (e.g., AISI 316L, AISI 631). They feature enhanced resistance to pitting and crevice corrosion, comply with strict hygiene standards regarding the absence of elemental migration into the surrounding environment (in accordance with FDA regulations and Regulation EC 1935/2004), and maintain stable mechanical properties during sterilization and cleaning in CIP/SIP (Clean-in-Place / Sterilization-in-Place) systems.
Steel Grades and Environmental Requirements in the Food & Medical Sectors
The choice of raw material determines the fatigue life and chemical resistance of the finished component. At Metalpol, we manufacture springs for regulated industries using exclusively certified wire sourced from vetted European mills.
Common Material Specifications
| Steel Grade (EN / AISI) | Corrosion Resistance | Max. Operating Temp. | Specific Application | Standards Compliance |
| 1.4310 / AISI 301 | Medium / High | 250°C | General food machinery components, dispensers | RoHS, REACH |
| 1.4404 / AISI 316L | Outstanding (contains Mo) | 300°C | Direct food contact, medical implants, CIP systems | FDA, EC 1935/2004, Medical |
| 1.4568 / AISI 631 | Very High | 340°C | High-pressure valves, autoclave equipment | RoHS, REACH, Aerospace |
Stringent Standards and Surface Purity
Manufacturing components for medical applications and food processing involves more than just shaping wire on CNC bending machines. Controlling ferritic contamination is equally critical. During conventional mechanical processing, micro-particles of iron from tooling can deposit onto the stainless steel surface, leading to localized galvanic corrosion.
To prevent this, we implement specialized procedures:
- Surface Finishing: Subjecting springs to chemical passivation and electropolishing processes, which removes the outer chromium-depleted layer and forms a uniform, ultra-smooth chromium oxide film.
- Meeting ESG Criteria: All materials used are fully compliant with EU REACH and RoHS directives, guaranteeing freedom from toxic impurities and heavy metals.
- Traceability: Every production lot comes with a full 3.1 mill test certificate detailing the exact chemical composition and mechanical properties of the heat.
Why Partner with Us?
As a manufacturer operating an automated production facility located in Mielec, Poland, we offer B2B partnerships backed by hard quality evidence. We have been operating on the market for over 50 years, supplying millions of components annually to more than 500 customers worldwide.
- Quality Certification: Our quality management system is certified according to ISO 9001:2015 and automotive IATF 16949:2016 standards.
- Precision Testing: We house a modern, specialized metrology laboratory that verifies the load-deflection characteristics of springs against strict geometric tolerances.
- Defense Grade Reliability: We hold a NATO Commercial and Government Entity Code (NCAGE), confirming compliance with the highest standards of security and supply stability.
Optimize Your Project – Consult with Our Experts
Selecting the correct spring parameters during the R&D design phase helps prevent costly machinery failures and production downtime. We invite design engineers and procurement specialists to contact our technical advisory team directly for a non-binding consultation.
- Sales & Logistics Department: +48 (17) 774 5673 /+48 (17) 774 5678
- E-mail: info@mtlpl.eu
