SNIM operates a railway and various mining operations in Mauritania, located on the coast of northwest Africa.
Under the contract, Wabtec's Standard Car Truck subsidiary will provide bogies and related spare parts for the cars, which will help SNIM increase its iron ore shipments significantly during the next three years.
Wabtec expects to complete deliveries of the components in 2014, the company said.
Albert J. Neupaver, chairman and chief executive officer of Wabtec, said: "This contract demonstrates the global scope and capabilities of our freight rail operations. We believe Wabtec will continue to benefit as countries around the world continue to invest in their freight transportation systems and infrastructure."