Apply for a patent for cast steel materials

The so-called grade steel generally refers to the steel whose mechanical properties and chemical composition meet the standards of American Railway Association () and grade steel. Since 2000, all freight train couplers approved by the United States have adopted grade steel. In order to meet the demand of high-speed and heavy-load railway transportation, grade steel is gradually replacing the traditional ordinary carbon cast steel and becoming the leading material of railway freight car couplers in China. A high-strength fine-grained medium-low carbon alloy steel involved in American patent consists of cast steel, with the components of 0, 0, 0, 0, 0 and the balance of impurities. Proper quenching and tempering temperatures can improve the strength and plasticity of steel.