Dakota Foundry — Webster, South Dakota
Gray Iron & Ductile Iron Castings
American-made iron castings from a two-time AFS Casting of the Year winner. No-bake air-set process. Up to 5,000 lb. ISO 9001:2015 certified. Domestic supply chain, no overseas delays.
Gray Iron Castings
Gray iron is the workhorse of the foundry industry — excellent machinability, vibration damping, and compressive strength. Dakota Foundry produces Classes 30 through 45 gray iron using the no-bake air-set process for superior dimensional accuracy and surface finish.
- Alloy Classes
- Class 30, 35, 40, 45
- Max Part Weight
- 5,000 lb
- Process
- No-Bake Air-Set
- Location
- Webster, South Dakota
- Certification
- ISO 9001:2015
- Lead Time
- Competitive domestic
Ductile Iron Castings
Ductile iron (nodular iron) delivers the strength and toughness of steel with the castability of iron. Dakota Foundry performs in-house magnesium treatment and produces grades from 60-40-18 through 100-70-03 — covering the full range of structural and wear-resistant applications.
- Grades
- 60-40-18, 65-45-12, 80-55-06, 100-70-03
- Max Part Weight
- 5,000 lb
- Process
- No-Bake Air-Set
- Location
- Webster, South Dakota
- Certification
- ISO 9001:2015
- Magnesium Treatment
- In-house
How We Work
From Print to Finished Casting
01
Engineering Review
Our team reviews your print and specs. We identify parting lines, draft angles, and gating strategy before tooling begins.
02
Pattern & Tooling
Spartan Pattern produces precision wood, urethane, or metal patterns with MAGMA simulation to optimize gating and risering.
03
Mold Making
No-bake air-set sand molds are produced and assembled. Cores are set and the mold is prepared for pour.
04
Melting & Pour
Iron is melted in our induction furnaces and spectrometer-verified before every pour. Ductile iron receives magnesium treatment in-house.
05
Shakeout & Cleaning
Castings are shaken out, gates and risers removed, and shot-blasted to a clean finish.
06
Inspection & Shipping
Dimensional inspection, Brinell hardness, and spectrometer verification. PPAP documentation available. Shipped direct to your facility.
Industries Served
Where Our Iron Castings Go
Dakota Foundry produces gray iron and ductile iron castings for demanding applications across agriculture, construction, oil and gas, mining, and industrial OEM manufacturing. Our no-bake process handles complex geometries and large part weights that other foundries turn away.
- Agricultural equipment
- Construction machinery
- Oil & gas components
- Mining equipment
- Pumps & valves
- Industrial gearboxes
- Hydraulic housings
- Counterweights & ballast
- OEM structural parts
Why Dakota Foundry
Why Customers Choose Us
- Two-time AFS Casting of the Year winner (2022 & 2025)
- No-bake process for superior dimensional accuracy
- In-house magnesium treatment for ductile iron
- MAGMA simulation before first pour
- ISO 9001:2015 certified quality system
- Spectrometer verification on every heat
- PPAP documentation available
- Domestic supply chain — no overseas delays
Quality Assurance
ISO 9001:2015 Certified Quality Systems
Every casting that leaves Dakota Foundry is backed by a documented quality system. We maintain ISO 9001:2015 certification and support PPAP documentation, first article inspection, and full material traceability from heat to finished part.
- Spectrometer verification on every heat
- Brinell hardness testing
- Dimensional inspection & CMM
- Tensile bar testing
- X-ray inspection (available)
- Laser scanning (available)
- PPAP documentation support
- Full material traceability
Spectrometer
Every heat verified
Dimensional
CMM & laser scanning
Mechanical
Brinell & tensile
PPAP Support
Full documentation
Get Started
Ready to Source American Iron Castings?
Send us your print and specs. Our team will review your project and respond with a competitive quote from Dakota Foundry in Webster, South Dakota.