Casting Contract Manufacturers in Canada

Casting contract manufacturing in Canada

A Canadian casting contract manufacturer converts molten metal into near-net-shape parts using controlled moulds or dies, then machines, heat-treats, and inspects the castings to meet your drawing. The relationship covers tooling design and fabrication, pattern or die maintenance, metallurgical process control, post-cast machining, surface treatment, and shipping. You own the design and the tooling; the foundry operates the process.

This page covers the casting process within Canadian contract manufacturing. For the broader framework on shop evaluation and CUSMA logistics, start with the contract manufacturing in Canada pillar. For CNC finishing after casting, see CNC contract manufacturing in Canada.

Casting processes available in Canada

Sand casting. The most broadly available casting process in Canada. A pattern (typically wood, urethane, or aluminum) forms a mould in bonded or green sand. Molten metal is poured and solidifies. Green sand patterns cost less but give rougher finishes and looser tolerances than no-bake (chemically bonded) sand. Sand casting covers a wide size range, from fist-sized brackets to multi-tonne structural components for mining and energy equipment. Dimensional tolerance is typically DCTG CT8-10 per ISO 8062; tighter features require post-cast machining.

Investment casting (lost-wax). A wax replica of the part is built up in a ceramic shell, the wax is burned out, and metal is poured into the cavity. The result is a near-net-shape part with excellent surface finish (Ra 3 to 6 µm) and dimensional accuracy (CT4-6), significantly reducing post-cast machining. Investment casting is the process of choice for complex aerospace, pump, valve, and surgical instrument geometry in steel, stainless, and nickel alloys where machining would be excessively expensive.

Die casting. Molten aluminum, zinc, or magnesium is injected under high pressure into a hardened steel die. The result is a high-volume, repeatable part with tight tolerances, good surface finish, and thin walls. Die casting is the process for consumer hardware, automotive components, electronic enclosures, and any product where 10,000-plus pieces per year justify the tooling investment. Canadian die casting shops are clustered in Ontario and Quebec, with a strong automotive-aligned tier in the GTA.

Permanent mould casting. Reusable metallic moulds (typically cast iron or steel) without the pressure injection of die casting. Used for mid-volume aluminum parts where die-casting pressure is not needed but dimensional consistency is better than sand. Common for brackets, housings, and structural components at 500 to 10,000 pieces per year.

Centrifugal casting. Molten metal is poured into a rotating mould; centrifugal force distributes metal uniformly against the mould wall. Used for cylinders, rings, pipes, bushings, and bearing shells where a defect-free, dense cross-section is critical. Canadian centrifugal casting is available in Ontario and Alberta, serving mining, oil-and-gas, and power generation customers.

Regional casting capacity in Canada

• Ontario (GTA and surrounding). The largest concentration of Canadian foundries. Hamilton’s steel industry history supports steel and ductile iron foundries. Brampton and Mississauga host aluminum die casting shops. Kitchener-Waterloo has investment casting and sand casting capacity for automotive and industrial customers.
• Quebec. Investment casting and aluminum casting for aerospace (Bombardier, Pratt & Whitney Canada supply chains) and industrial machinery. The province’s stacking of SR&ED with Investissement Québec support makes Quebec attractive for tooling development and first-article iteration.
• Alberta. Steel sand casting and centrifugal casting serving oil-and-gas and mining. Shops in Edmonton and Calgary hold API Q1 and serve downhole tool, valve body, and manifold casting.
• British Columbia. Bronze, brass, and aluminum casting for marine, mining, and industrial applications. Several BC foundries serve the port and offshore marine sector.

Certifications for Canadian casting and foundry work

How casting fits in a product program

Casting is the right process when:

• Part geometry is too complex for machining from solid (internal passages, complex external profiles, weight-optimized ribbed structures).
• Volume is high enough to amortize tooling (die casting: 1,000+ per year; investment: 200+ per year; sand: any volume).
• Material needs to be an alloy that cannot be extruded or rolled into the desired shape.
• Near-net-shape is more cost-effective than starting with a billet.

Post-cast machining is nearly always required on functional surfaces. The casting contract manufacturer should either machine in-house or have a qualified machine shop in the supply chain, with traceability maintained across the handoff.

How to spec a Canadian casting RFQ

1. 3D model (STEP) with all draft angles, wall thickness minimums, and rib geometry.
2. 2D drawing with critical dimensions, tolerances, and surface finish callouts.
3. Material specification (alloy designation, temper, mechanical property requirements, ASTM or AMS spec).
4. Annual volume and first-order quantity (drives the tooling amortization discussion).
5. Post-cast operations required (machining, heat treat, NDT, coating).
6. Quality requirement (ISO 9001, AS9100, IATF 16949, API Q1; inspection level and documentation).
7. Target unit price or budget (helps the foundry propose the right process).

The Assembly RFQ form routes a complete casting package to matched Canadian foundries within two business days.

Get a quote

Get a quote. Send your 3D model, drawing, material spec, and annual volume. The Assembly platform routes the RFQ to matched Canadian casting contract manufacturers within two business days.

Apply as a Founding Partner. If you run a Canadian foundry or casting contract manufacturer with ISO 9001, AS9100, or API Q1 certification, apply through the partner intake.