How do you do pig iron? Gloss is bright. Use a shaping knife
Wrought iron is pig iron produced after purified, the impurity content is very small, but also very soft cannot be used to do the knife.
Pig iron, also known as cast iron, because of the large amount of impurities, very brittle, can only be used to cast iron pots, a class of things that do not need strength.
Generally less than 0.0218% carbon content that wrought iron or iron, the content of 0.0218-2.11% in the name of steel, called iron content in 2.11-6.69%. Steel is used for knives. The ancient words of wrought iron carburizing treatment, after the increase of carbon content is used to make steel.
