1020 is a general purpose low tensile low hardenability carbon steel generally supplied in the cold drawn or turned and polished condition, with a typical tensile strength range 410 - 790 Mpa, and Brinell hardness range 119 - 235.
Characterised by excellent weldability, very good machinability with reasonable strength and very good ductility.
1020 is used extensively by all industry sectors for applications requiring good machinability or excellent weldability when high strength is not required plus lightly stressed carburised parts. It is also often used un-machined as supplied