What kind of steel is carbon steel in threaded steel?
China and some countries according to the guarantee of delivery conditions, the ordinary carbon steel is divided into three categories: a steel (a steel), only ensure the mechanical properties, does not guarantee the chemical composition, type B steel (B steel), only to ensure that the chemical composition, does not guarantee the mechanical properties; special steel (C steel). Not only guarantee the chemical composition, mechanical properties and guarantee. Special steel is often used to make more important structural parts.
Carbon steel. Carbon content of 0.06-0.22%, less than 0.25% is the most common. Of low carbon steel, each of which indicates the minimum yield point of the steel at a thickness of less than 16mm. Compared with high quality carbon steel, carbon content, range of performance, and content of phosphorus, sulfur and other residual elements are wider.
The carbon structural steel is mainly used to make engineering structural parts. It is generally used in the supply state, steel sulfur and phosphorus content is higher, allowing 0.050% and 0.045%, respectively. This kind of steel accounts for a large proportion of the total output of steel.
