KIND OF STEELS

Steel is an alloy of iron with carbon and we can improve its properti by adding other elements such as tungsten.Alloy steels are very strong and tough.They are probably the most important metals for knives,tools,and machinery. There are many types of steels such as low carbon steel,mild steel,medium carbon steel,and high carbon steel.Low carbon steel is not very hard.Its the softest of the steels.Mild steel is harder than low carbon steel.Medium carbon steel is even harder.The high carbon steel is the hardest. Low carbon steel is not very strong.It is the weakest of the steels.Mild steel is stronger than low carbon steel.Medium carbon steel is even stronger.The high carbon steel is the strongest. Furthermore,we can also classify high carbon steels into three kinds,spring,steel,and tool steel.Hardsteel is as hard as spring steel.The tool steel is the hardest and it is often used for cutting tools such as chisels and drills. High carbon steel has a great strength and hardness.It is easy for us identify high carbon steel in the spark test;namely,when we grind it,high carbon steel always produces showers of sparks.