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About us

Sustained efficiency since 1980

The heavy industry brings big, beautiful projects, but also major investments. We succeed by making sure they are efficient and sustainable at every level.

Key figures

Large industrial complex with an equipment park, full services and competent teams.

welders, machinists and industrial mechanics
lifting capacity
feet under
diameter on double columns vertical lathe

Our mission

Where heavy industry projects and efficiency go hand in hand

We can carry out large-scale heavy industry projects in a safe environment ensuring quality while meeting deadlines at the best possible cost.

Grande pièce d'envergure dans l'usine avec des grandes échelles sur les côtés


From refurbishment to turnkey project

Aciers Richelieu's first plant in 1980 when it was founded

1980 - First plant

Founded by Mr. Jean Tremblay, our core business was the rehabilitation of mechanical equipment in heavy industry. Thanks to our great versatility and expertise in the repair of critical parts, we were able to differentiate ourselves by the speed to deliver customers’ requests.

Aciers Richelieu's first plant in 1980 when it was founded

1986 - New building

Relocated to a brand-new building at 190 rue du Roi with greater production capacity. There have been several phases of expansion since then. Today, the building houses administration, design, cutting and forming equipment, and several assembly and welding stations.

First new equipment in 1987: the shear

1987 - First new equipment

Aciers Richelieu acquired its first new piece of equipment! Over the years, we have added a 120’ submerged rail-mounted arc, positioners of up to 15 t, hydraulic presses of up to 600 t, a 10’ x 44’ cutting table, a 4-roller rolling machine, a 5-axis horizontal boring machine, and much more.

Camion Acier Richelieu pour le premier contract de wago

1988 - Wagon contract

We delivered our first contract for several new railcars. They were destined to ore transport.

Stéphane, one of our in-house industrial designers

1995 - Design Department

A design department was created, now counting 10 draftsmen, project managers and engineers, enabling us to support engineering, as well as design new mechanical parts and equipment.

Les actionnaires d'Aciers Richelieu : Guy Durand et Éric Durand


Actionnariat de Guy et Éric Durand. Après avoir rejoint l'entreprise respectivement en 1987 et 1994 les frères Durand s'associent avec leur oncle M. Jean Tremblay.

Large part being installed by our site team

2003 - On-site maintenance

An installation team was created to intervene in planned or emergency shutdowns in any type of industrial maintenance work, such as equipment dismantling, maintenance work or welding. Today, we have some forty employees, including welders, industrial mechanics and supervisors.

Livraison d'une énorme pièce soit un réservoir gris

2006 - 33’ diameter tank

This was Aciers Richelieu’s largest large-scale project, delivered on Marie-Victorin Street in St-Joseph-de-Sorel. This 33’ diameter tank required the repositioning of electrical wires in the road path. Transport took nearly 8 h to cover 1.5 km from our plant on rue Cormier to the customer’s plant.

Patrick Doyon, Guy Durand and Éric Durand: the shareholders of Aciers Richelieu

2011 - New management

Mr. Jean Tremblay passed on the reins of his company Aciers Richelieu to the Durand brothers and their new partner, Patrick Doyon, who joined the company in 2005.

Usinage St-Laurent's new plant witch got purchased in 2015 by Richelieu Steel

2015 - Acquisition of Usinage St-Laurent

Usinage St-Laurent was acquired in July 2015. The synergy between the two companies allows us to offer a complete range of services. Customers include major companies in the hydroelectric, metallurgy and aerospace sectors.

Vue d'ensemble sur l'usine avec en avant-plan l'aléseuse horizontale

2020 - Modernization plan

New three-year equipment modernization plan at Aciers Richelieu and Usinage St-Laurent. Acquisition of three Fermat horizontal boring machines, including a 5-axis machine with a 20-ton capacity, a 10’ x 44’ CNC cutting table, CNC vertical saw, Hexagon 7540 measuring arm (inspection) and 3D scanner.


Logo 1.1 et 1.2 ASME
Pressure vessels
Logo du Bureau Canadien de soudage
Canadian Welding Bureau (CWB)
Logo de ISO 9001-2015
Iso 9001-2015
Logo de Cognibox

ASME U-Stamp Section VIII, Division 1

Aciers Richelieu provides certified, turnkey pressure vessels, including all design, manufacturing, inspection and certification requirements for all pressure vessels.

Logo of ASME U-Stamp Section VIII, Division 1

ASME B31.1 et B31.3 Tuyauterie sous pression

Aciers Richelieu complies with requirements for design, materials, manufacture, assembly, examination, testing, inspection, operation and maintenance of piping systems found particularly in industrial plants.

Logo of ASME U-Stamp Section VIII, Division 1

CSA W74.1 Division 2 et CSA W59

· Certification of steel-fusion welding companies · Welded steel construction (arc welding)

Logo du bureau canadien de soudage

Quality management system

We've been certified since 2009, demonstrating Aciers Richelieu and Usinage St-Laurent’s ability to provide services, products and systems compliant with customer requirements and regulatory frameworks. We aim to continually optimize our methods and organization. This makes it possible to review and optimize existing processes, and to perpetuate good business practices.

Logo de ISO 9001-2015


Aciers Richelieu has been a Cognibox member since 2012. This certifies us as a safe and socially responsible supplier and simplifies the qualification and compliance process for your needs.

Logo de Cognibox

Prevention mutual

Our two health & safety advisors (plant and site) contribute to fostering healthy and safe workplaces for all our employees. Aciers Richelieu and Usinage St-Laurent are members of a prevention mutual that groups together several companies based on their performance in occupational health and safety.

Lussier's logo

The team

Éric Durand Président
Éric Durand, ing.
Patrick Doyon Vice-President Finances
Patrick Doyon, CPA
Vice President Finance
Profil de François Cournoyer, employé chez Aciers Richelieu
François Cournoyer
Production Manager - AR
Patrick Gladu
Planning & Supply Manager - AR
Lucio Corradini Directeur d'usine - Usinage St-Laurent
Lucio Corradini
Factory Manager - USL
Alexandre Clément
Alexandre Clément, ing.
Project Manager - Installation - AR
Jacques-Olivier Richer Superviseur installation
Jacques-Olivier Richer
Installation supervisor - AR
Profil d'Anthony Letendre, employé chez Aciers Richelieu Usinage St-Laurent
Anthony Letendre, ing.
Project Manager
Placeholder - Director, Business Development and Continuous Improvement
Hugo Domaine
Director, Business Development and Continuous Improvement