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After hot rolling and pickling, steel is cold rolled (below the re crystallization temperature) to a reduced thickness. This is then followed by annealing in a closed atmosphere of nitrogen or other non-oxidizing gases thereby relieving stress, increasing strength and ductility. It also improves the surface finish and holds tighter tolerances.
Applications :- Furniture,Steel barrels,Containers,Precision tubes,Computer casing, white goods
CRFH is mainly use for re-rolling, coating(galvanizing) purposes