10# steel pipe implementation standard: GB/T699-1999 "high quality carbon structural steel";
10# steel pipe plastic, toughness is very good, easy to cold and hot processing forming, normalizing or cold processing after cutting performance is good, good weldability, no tempering brittleness, hardenability and hardenability are poor.
The manufacturing of 10# steel pipe requires small stress, high toughness parts, such as car body, storage, deep stamping vessels, pipes, gaskets, etc., can be used for cold rolling, cold stamping, cold heading, cold bending, hot rolling and other processes, but also can be used for core strength is not high carburizing parts, carbonitriding parts, etc.
20# steel pipe standard: GB/T 699-1999 "high quality carbon structural steel"; 20# steel pipe belongs to high quality low carbon steel, cold extrusion, carburizing quenching steel.
The 20# steel pipe has low strength, good toughness, plasticity and weldability. The tensile strength is 355~500MPa, and the elongation is ≥24%.
