Civil Engineering - Building Materials - Discussion

Wrought iron - where is it used?

Anyone, please give me the details.

What is the difference between cast and wrought iron?

Wrought iron contains 0.15% carbon.

It should be 0.15%, as it is the maximum limit.

Wrought iron contains 0.08% of carbon as per iron-carbon diagram.

Wrought iron is an iron alloy with a very low carbon (less than 0.08%) content in contrast to cast iron (2.1% to 4%). It is a semi-fused mass of iron with fibrous slag inclusions (up to 2% by weight), which gives it a "grain" resembling wood that is visible when it is etched.

C.I and Pig iron - 2 to 5%.
Steel - 0.5 to 1.5%.
W.I - 0.1 to 1.25%.
Mild steel - less than 0.25.

Wrought iron is an iron alloy with a very low carbon (less than 0.08%) content in contrast to cast iron (2.1% to 4%). It is a semi-fused mass of iron with fibrous slag inclusions (up to 2% by weight) , which gives it a "grain" resembling wood that is visible when it is etched or bent to the point of failure. Wrought iron is tough, malleable, ductile, corrosion-resistant and easily welded. Before the development of effective methods of steelmaking and the availability of large quantities of steel, wrought iron was the most common form of malleable iron. It was given the name wrought because it was hammered, rolled or otherwise worked while hot enough to expel molten slag. The modern functional equivalent of wrought iron is mild or low carbon steel. Neither wrought iron nor mild steel contains enough carbon to be hardenable by heating and quenching.

High carbon steel =0.8 -1.5.
Medium (high tensile)=0.3-0.8.
Mild =0.15-0.3.
Dead mild= less 0.15.

What is bloomery process and what is it's use?