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Manganese Castings

Our castings are manufactured to meet or exceed ASTM, AREMA, UIC 8062 and customer specific standards. We offer a full slate of high solidity and industrial castings to suit any customer requirements ranging from as-cast to fully milled and explosive hardened assemblies.

Our three primary classifications of cast frogs are:

Rail Bound Manganese (RBM) and Solid (SSGM) frogs - proven work horses of the rail industry;

Welded Boltless Manganese (WBM) Frogs - by eliminating all rail joints using patented welding process the frog generates a continuous running surface that is not affected by CWR thermal stresses and reduces maintenance;

Welded Spring Manganese (WSM) Frogs - improved performance by using wear resistant manganese steel to replace an assembly of rail, blocks and bolts that wear and work loose. Bolt shearing is prevented by the elimination of bolts through the patented butt welding process of the manganese to the heel rails.


  • Materials are held to the highest standards exceeding all current AREMA standards
  • Fast customer response
  • Custom design and manufacturing capabilities. All design, engineering, tooling and production are performed in-house
  • Nortrak castings have proven track record
  • Unparalleled after sales service