The basic classification of steel which results from scarborough towing is the division into carbon steel and alloy steel. The second occurs when alloying components such as manganese, vanadium, aluminum, boron, molybdenum, etc. have been added to the steel in order to give the material certain properties. Most often, alloying is performed in a complex way – several components are added to create steel with the desired characteristics.
The classification attributes for steel are numerous and multifaceted. The material varies:
By chemical composition (carbon and alloyed).
Ordinary steels – sulfur impurities contain up to 0.06%, phosphorus in 007%;
High-quality steels – s
Electric furnaces produce highly refined, alloyed steels. The maximum possible purification from oxides and sulfides is accomplished by electroslag remelting.
Depending on the application:
Depending on where and for what purpose the resulting steel is to be used, the material is divided into:
ulfur content up to 0.04%, and phosphorus up to 0.035%;
High-quality steels – both sulfur and phosphorus contain less than 0.025%;
Extra-high quality steels – less than 0,015% of sulfur.
According to the method of production:
Ordinary steel is produced in an open-hearth, Bessemer, or Thomas converter. It may have the greatest number of no
Construction steels – of ordinary quality or high impurity content, which do not require complex and expensive purification and are well weldable.
Cold-formed steels – characterized by low carbon content.
Cementitious steels – material with high carbon content, in some cases with added alloying components, designed for use with the possibility of dynamic loads and direct surface wear.
Suspension spring steels – the purpose is determined by the name of the material, and the features include elasticity and high fracture resistance. These steels are produced by alloying with manganese, vanadium and silicon.
According to the degree of deoxidation.
It refers to how much oxygen was removed from the metal during the production of steel, and, accordingly, how much was left. In this regard, a distinction is made:
Boiling steels, or oxygenated steels;
Semi-quiescent steels, partially oxygenated;
Quiescent steels, or oxygen-free steels.