Historically, rail systems have used primarily steel forgings for fastening systems. Today, ductile iron provides the strength and toughness required for these demanding applications.

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Ductile Iron Tie Plates and Fasteners
from left: tie plate (36 lbs), washer (1 lb), base plate (19 lbs), frog clamp (8 lbs), rail brace (7 lbs), serrated washer (1.2 lbs), hook-in shoulder (2.5 lbs), hook-in shoulder (1.7 lbs)

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Tie Plate Assembly for Urban Rail Transit System
from left: complete assembly with rail, tie plate (20 lbs), insulator plates (0.5 lbs)

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Ductile Iron Rail Fasteners
see first two photos for descriptions and weights