ABSTRACT
Carbon steels containing no alloying elements are called plain carbon steels. The manganese contents of these steels does not exceed 1.65%. Carbon steels with small additions of rare-earth elements are known as high-strength low alloy (HSLA) steels. On the basis of carbon content, plain carbon steels are divided into the following groups: https://www.niso.org/standards/z39-96/ns/oasis-exchange/table"> Type of Plain Carbon Steel Carbon Content, % Ultra low carbon (ULC) ≤ 0.005 Extra low carbon (ELC) ≤ 0.06 Very low carbon ≤ 0.10 Low carbon ≤ 0.25 Medium soft carbon 0.26 to 0.40 Medium high carbon 0.41 to 0.60 High carbon > 0.60
