The use of steel with special properties in some industries such as oil and gas pipelines is very important due to the sensitivity of this industry and its transmission.In order to make these pipes, the steel used must have API standard. In previous years, the steel used in this industry was supplied from abroad. Since 2016, Mobarakeh Steel Company of Isfahan, in order to be self-sufficient in manufacturing API steel, has provided its infrastructure measures, and since last year, this company has been producing this steel.