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Frogs - Welded Spring Manganese Frogs (WSM®)

voestalpine Railway Systems Nortrak’s WSM® Frogs improve 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. WSM Frogs can be welded when worn because of the high solidity casting. These factors and large multi-tie base plates result in a strong frog that resists thermal stresses.

  • Uses High-Solidity explosive depth hardened (EDH) manganese steel
  • Continuous running surface
  • Large multi-tie base plates
  • Reduced maintenance
  • Low Impact