Quality testing

Steel production involves the execution of several quality tests.

  • Non-destructive tests
  • Chemical analysis
  • Metallographic tests
  • Contamination tests
  • Field trials
  • Mechanical tests (Traction, resilience, hardness)
  • Accelerated aging tests
  • Yield strength tests


STILMA is committed to continuous improvements and obtaining the accreditations, which certify our systems and processes, guaranteeing quality and reliability of material supply to our customer base.


Accreditation TÜV SÜD

STILMA has updated its TÜV SÜD ISO 14001 (April 2022) and 9001 (October 2021) certifications:

Manufacture of alloy, non-alloy and stainless steel products, cold drawn in different sections, peeled-rolled, ground and induction surface hardened round bars according to national and international standards and according to Customer’s specification. Trading of hot rolled bars in different sections; heat treatments as quenching and tempering, annealing, normalization,
stress relieving of alloy steel bars according to national and international standards and according to Customer’s specification (IAF 17, 29)

TÜV Italia is a third-party inspection and certification body accredited by Accredia, operating in Italy since 1987 and part of the TÜV SÜD group founded in 1866.


Nell’ambito della produzione di acciaio, STILMA si impegna da sempre per ottenere certificazioni che garantiscano costantemente la qualità e l’affidabilità dei materiali e dell’azienda.


Certificazione TÜV SÜD

STILMA ha acquisito la certificazione TÜV SÜD ISO 14001 e 9001:

Fabbricazione di prodotti in acciaio legato, non legato ed inossidabile, mediante trafilatura a freddo e varie sezioni secondo normative nazionali, internazionali e su specifica del cliente, Trattamenti termici di bonifica, ricottura, normalizzazione e distensione di barre in acciaio speciale secondo normative europee e capitolati specifici.

Customer service

The customer service and technical team at STILMA offers real-time support and solutions to market challenges.

A skilled and experienced team manages customer service at STILMA. All materials are tested using modern and innovative instruments and tested for actual conditions of use.

STILMA assures our customers with:

  • Customised service in order processing
  • Technical know-how
  • Control and monitoring at all stages of the production process

Thanks to our long experience in steel production, STILMA is able to offer solutions for:

  • Choice and implementation of materials
  • Method planning and production control
  • Processing and elaborating test results