A foundryman watching molten iron pour from an overhead ladle into a mold
Home/What We Do/Castings Capabilities
WHAT WE DO

MATCHED TO YOUR PART. NOT TO OUR EQUIPMENT.

FROM ONE OUNCE TO 30,000 POUNDS

A single foundry quotes what its equipment can make. GW starts from your print.

Because we place work across a qualified network of domestic and international foundries, every major casting process is on the table — and the recommendation you get is driven by what the part needs: geometry, material, tolerance, volume, and cost.

Sand Casting
Best for: larger parts, complex geometry with cores and internal passages, and low-to-mid volumes where tooling cost matters.

Green sand, no-bake, and shell molding across the network, from ounces to multi-ton castings. Competitive tooling costs make sand casting the practical choice for prototypes and short runs; process control keeps it dependable at production volume.

Typical parts: machine bases, housings, pump bodies, transmission cases, counterweights.
Investment Casting
Best for: fine detail, thin walls, complex precision, tight as-cast tolerances, and higher-quality surface finishes that reduce or eliminate machining.

For smaller, complex, higher-volume parts, investment casting delivers near-net shape and cuts downstream cost. If your part is a fit, we’ll place it with the right specialty foundry — you don’t have to go find one.

Machined Casting
Best for: buyers who need a finished, ready-to-install component — not a raw casting and a second sourcing project.

When casting and machining are quoted separately, every defect becomes a debate between two vendors. At GW, both are managed by one team, so it’s simply our problem to fix. Pilot runs validate every setup; CMM inspection verifies critical dimensions — bores, flatness, alignment — before parts ship. What arrives is ready for your line.

Custom Alloys & Materials

Gray iron, ductile iron, steel, stainless, aluminum, bronze, and custom alloys formulated to your requirement.

If you have a material spec, we’ll meet it.

Specs & Tolerances.

Castings from ounces to 30,000+ pounds
Prototype quantities through high-volume production
Pilot runs and first-article validation before production release
CMM inspection of critical features; dimensional reports available
Material certifications and quality documentation to your requirements

Every part is produced to your drawing and your acceptance criteria. If you’re not sure what tolerance a process can hold, ask — you’ll get an honest answer before you commit, not an excuse after.

A CMM probe touching a machined bore on a gray iron casting on a granite plate

What to Send With Your RFQ.

The faster we understand the part, the faster you get a real number. Helpful to include:

Drawing or model, with critical tolerances flagged
Preference: domestic, international, or both
Material spec — or the performance requirement behind it
Annual volume and typical release quantity
Target date, and whether the part is currently in trouble
Anything that’s gone wrong with this part before

Have a part in mind?

Send us a drawing. We'll come back with the right process and production plan — fast.