Wrought iron and steel which is more hard
Steel. The carbon content reaches a certain degree of iron into iron hard, pure metal hardness generally than alloy bottom.
As we know, the main difference lies in the pig iron, wrought iron and steel carbon content, carbon content of more than 2% of iron is iron; carbon content of less than 0.05% of the iron, wrought iron is called the carbon content in 0.05%; 2% of the iron and steel called. With a block of iron through carbon steel knife, although relatively sharp, but still not to be able to "cut gold and jade broken, standing on the level. Because the quality of the steel is not good enough, how much carbon into the steel smelting, the distribution is uniform, the impurities removed, are very difficult to grasp, low production efficiency and. In order to improve the quality of steel, Chinese ancient craftsmen invented the "100 steelmaking" new process from the middle of the Western Han dynasty. The famous scientist Shen Kuo described the 100 steelmaking process of magnetic state in "Meng Xi Bi Tan", is the continuous burning forging hundreds of times, and weight reduction so far. The so-called "100 steel smelting", that is, block iron repeated heating, folding, forging, so that the steel compact structure, uniform composition, impurities to reduce, thereby improving the quality of steel. The sword made of 100 steel is of high quality. So hard
The difference between iron and steel: iron into pig iron and wrought iron. Wrought iron, steel and cast iron is an alloy of iron and carbon with the carbon content difference. Generally less than 0.2% carbon content that wrought iron or iron, the content of 0.2-1.7% in the steel, is iron content of more than 1.7%. Soft wrought iron, good plasticity, easy deformation, strength and hardness were lower, not widely used; iron carbon, hard and brittle, almost no plastic; steel pig iron and wrought iron with two kinds of advantages, widely used for human.
