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

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Iron castings

Northern Iron & Machine produces the highest quality machined cast iron parts in our three induction melting furnaces.

We can produce castings of gray, ductile, and austempered ductile iron from a few pounds up to 250 lbs. and we can make production quantities as well as short runs.

Machined castings

Many of our iron parts are routed to our machining facility which transforms the iron castings into precision parts with our CNC equipment.

See our iron machining section for more detail.

Iron casting subassemblies

Whatever your iron casting needs, Northern Iron & Machine can assemble them to you specifications. From simple inserts to multiple component assemblies, we have the knowledge and equipment.

As a certified supplier to Caterpillar, we are familiar with line ready iron castings and assemblies and manufacture to ISO 9001:2015. Request a quote today.

Remarkable solutions

Our in-house metallurgical lab and our ability to provide computerized solidification modeling will save you time and money as our experts will work closely with you to make sure your job starts right and runs efficiently.

We monitor and test both raw materials and finished parts to ensure we meet your specifications. The expertise and diligence of our metallurgical team are the primary reasons Northern Iron & Machine iron castings are always consistent and machinable.

Casting Operations

  • Castings up to 250 lbs.
  • All grades of ductile, austempered ductile or gray iron
  • Engineering assistance for part design
  • Computerized solidification modeling
  • Metallurgical lab on-site for chemical, physical and metallurgical testing
  • Precision CAD CAM technology
  • ISO 9001 certified

Call us today

and see how Northern Iron & Machine can shorten your supply chain, save you time and money, and guarantee you receive the highest quality iron castings and finished machined parts.
Molds per hour
Automated molding lines

Northern Iron’s largest molding line is an Osborne 30 square line. It has mold flasks that measure 30 x 30 x 12 inches deep. The pattern for it is mounted on two separate plates. The top flask is called the cope and the bottom half is called the drag.

Northern Iron and Machine has also installed a new DISA Match 130 automated molding line. The system, which is now fully operational, doubles the company’s molding capacity. The molding line has a flask size of 20×24. The system utilizes existing match plate patterns, so there are typically no conversion costs or steps from the old system to the new one. The automated line is ideal for low to medium requirements. 

Iron castings produced per shift
Melting department

Our three coreless induction furnaces have an average combined output of 35 tons/shift.

One General Kinematic charge dryer and pre-heater.