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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Breaking the Mold

Many of us know what a pattern is. But do you know the process that goes into making that pattern into a mold? Well, the process has been streamlined a bit, thanks to two high-capacity automated molding lines at Northern...
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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