Relatively to carbon steel,low alloy steel is based on carbon steel,and one or more alloying elements are intentionally added to the steel to improve the properties of steel, such as strength, hardness, toughness, wear resistance, and corrosion resistanc etc.The total amount of alloying elements less than 5%,called low alloy steel.
It is no doubt that 4140 steel is a low-alloy steel that contains chromium, molybdenum and manganese alloy elements.Due to its excellent toughness, wear resistance, impact resistance and high fatigue strength, it is widely used in many industries.