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Manufacturing Of Wrought Iron

What is Wrought Iron ? How it is Made ? 

Wrought Iron is highly refined iron with a small amount of  slag forged out into fibers. The chemical analysis of the metal shows as much as 99 percent of Iron. The slag characteristic of wrought Iron is useful in blacksmithing operations and gives the material its peculiar fibrous structure. The non - corrosive slag constituent causes wrought iron to be resistant to progressive corrosion. Moreover, The presence of slag produces a stricture which diminishes the effect of fatigue caused by shocks and vibrations. 



It is tough , malleable , ductile and has an ultimate tensile strength of about 35 kg-f per mm2. ( 350 Newton per mm2). It cannot be melted, but at a white heat, it becomes soft enough to take any shape under the hammer, i.e., it can be forged. It admits readily of being welded. This iron has the property with being able to withstand sudden and excessive shock loads with - out permanent Injury. It rusts more quickly than cast iron but stands salt - water better. It can neither be hardened nor tempered like steel.

Bolts and nuts, chains, crane hook, railway coupling, pipe and pipe fittings, plates , sheets , bars and boilers tubes are principal form in which wrought iron is used. This is produced by two commercial methods known as 

(a) Puddling process 

(b) Aston Or Byers process 

  

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