651-778-3300 Mon - Fri 7:00am - 3:30pm 867 Forest Street, St. Paul, MN 55106
Gray, ductile, and austempered ductile iron castings up to 250lbs.
ASTM A536, SAE J434, ASTM A48, SAE J431

Northern Iron & Machine is a full service iron foundry with in-house metallurgical lab and computerized solidification modeling. We produce grey castings, austempered ductile and ductile castings to the standards required including ASTM A536, SAE J434, ASTM A48, SAE J431.

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Precision technology helps ensure quality castings

Northern Iron doesn’t simply just make castings, we precision machine them too up to the highest standards. Our machinists work on some of the most precise machining equipment in the foundry industry. CAD/CAM software Northern uses cutting-edge ESPRIT CAM software...
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About us

Located in St. Paul, Minnesota, Northern Iron & Machine (NIM) operates a full-service foundry, specializing in high-quality metal castings and machined parts. The Company’s uncompromising commitment to quality and customer satisfaction has established it as a preeminent supplier of heavy industrial parts to large locomotive, construction, and agricultural industrial OEMs.

Why choose NIM?

Quality castings

Northern Iron & Machine produces the highest quality iron castings in our five-furnace foundry. Grey, ductile and austempered ductile iron castings up to 250 lbs.

In house machining

Let us add some value to your iron castings by providing a machined casting. Our four axis machines are capable of tolerances to ±0.0005 in.


Production line ready components can save you a lot time and money. Northern Iron and Machine offers paint, subassembly, and shipping to fit your needs.

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Meet the Family

Northern Iron & Machine is a proud member of The Lawton Standard family