One of the most common carbon steel grade. C1020 is a low tensile carbon steel with excellent machinability. Commonly used for DOM processed tubing. Similar to C1026, both are iron alloys and have close composition.
DOM
Drawn Over Mandrel is the process of which steel tube is pulled through a die in order to reduce its size.
C1026
C1026 is very similar to C1020. They are both low-tensile carbon iron. And, both are primarily for manufacturing DOM tubing.