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Trusted supplier for the nuclear industry

GEMACO is a leading supplier of high‑performance stainless steels engineered for the most demanding, corrosion‑sensitive environments.
With mechanical and physico‑chemical properties tailored to meet the stringent requirements of the nuclear industry, we deliver reliable, top‑quality solutions.

We supply a full range of products — piping, fittings, bars, sheets, and custom‑made components — all in full compliance with RCC‑M, CST EDF, and other key international standards (EN, ASTM) as well as strict Quality requirements (ISO 19443).

From EPR reactor maintenance to the future of fusion energy, GEMACO stands as your reliable partner for the most demanding nuclear applications.

Trusted Experts in Critical Nuclear Piping & Components

GEMACO is a leading supplier of high‑performance stainless steels engineered for the most demanding, corrosion‑sensitive environments.
With mechanical and physico‑chemical properties tailored to meet the stringent requirements of the nuclear industry, we deliver reliable, top‑quality solutions.

We supply a full range of products — piping, fittings, bars, sheets, and custom‑made components — all in full compliance with RCC‑M, CST EDF, and other key international standards (EN, ASTM) as well as strict Quality requirements (ISO 19443).

From EPR reactor maintenance and development to nuclear waste treatment and fusion energy projects, GEMACO is your trusted partner for critical nuclear applications.

Services & Capabilities

  • MATERIALS ACCORDING REQUIRED NORMS & SPECIFICATIONS:
    EN, ASME, RCC-M, RCC-MRX,, CST EDF, ORANO Standards,…
  • Wide product range:
    Tubes, fittings, flanges, bars, plates, sheets, assemblies, pieces according to plan, rings between pipe and fittings,…
  • Flexible solutions:
    Fast deliveries, complete packages, and custom‑made parts
  • In‑house capabilities:
    PMI testing, ultrasonic/dye‑penetrant inspection, and cutting operations
  • Project management:
    Technical file and order follow up from production to delivery
  • Technical support:
    Advice on grade selection and lifetime optimization

High‑performance materials for the nuclear industry

  • DUPLEX & NICKEL :
    Duplex alloys, super‑duplex, and nickel

  • STAINLESS STEEL (INOX) :
    304L, 316L, 316L SNA, 316 LN, 904L

  • HIGH‑TEMPERATURE & TITANIUM : 304H, 321H, 347H, 316H, 800H/HT, 310S, titanium

  • NON‑ALLOY STEELS : P265GH, P355, P235GH, …

Proven Compliance
Trusted Performance

  • Certified Assurance: Our operation is ISO 9001:2015 and ISO 45001:2018 certified by LRQA, and operates under the strict quality frameworks of ISO 19443 and ASME III.
  • Full-scope supplier : Strategic stockist and trader of steels, nickel alloys, and tailor‑made parts
  • Traceability: Complete identification and tracking of each piece

Services & Capabilities

Stock & Delivery

  • Extensive inventory covering pipes, tubes, flanges, fittings, bars, plates, and forged components in nuclear-grade materials

  • Fast-track delivery options for urgent shutdowns or critical maintenance timelines.

Project Management

  • Dedicated PMP‑certified team guiding your order from specification to delivery. Tailored support for complete piping packages.

In‑House Technical Services

  • PMI alloy verification, ultrasonic testing (UT), and dye‑penetrant inspections.

  • Cutting, corrosion testing, and bespoke finishing—delivered in‑house for consistency and speed.