ALUMINUM (AL): When added to molten steel, mixes very quickly with any undissolved oxygen and is therefore considered one of the most common deoxidizers in making steel. Aluminum also is used to produce a fine grain structure and to control grain growth.
When added to molten steel, mixes very quickly with any undissolved oxygen and is therefore considered one of the most common deoxidizers in making steel. Aluminum also is used to produce a fine grain structure and to control grain growth.
It produces the properties in steel that gives it such great value. As carbon content increases, there is a corresponding increase in tensile strength and hardness. Additionally, as carbon content increases, steel becomes increasingly responsive to heat treatment.
It is used to increase the red hardness of steel. It adds much life to a tool by its ability to maintain hardness and cutting ability when it’s heated to a dull red during a machining operation.
Like carbon helps in increasing the response to heat treatment. An increase in depth of hardness is also noticed with its use. When used in large quantities, it possesses a remarkable resistance to oxidation and erosion used in conjunction with other alloys. Chromium is one of the most popular alloying elements.
It is usually added in amounts of 0.2- 0.3% and helps steel resist corrosion. It also helps in some degree to increase tensile and yields strength with only a slight loss in ductility.
Although it lacks strength, is very soft and ductile and does not respond to heat treatment of any degree. Iron is the primary element in steel. With the addition of other alloying elements, required mechanical properties can be achieved.
It is used in steel to improve machinability. In small amounts of 0.15-0.3% and finely divided & distributed, it has no known effect on the mechanical properties of steel.
It is next to carbon in its importance in steel making. This is primarily because of its ability to resist hot shortness or the tendency to tear while being forged or rolled. Manganese is used in just about every steel that is made. It increases responsiveness to heat treatment and acts as a deoxidizer.