... carburized parts, such as stamping products, sleeve, enamel products, automobile shell and wear-resisting, high strength, more stress, friction under ... conditions and requirements quite elastic parts and so on. Shanghai Katalor Industry Co., Ltd Is the JIS G4051 S12C carbon structural ... www.steel-tube-pipes.com http://section-steel.com/ skype: shanghai.katalor ADD:Room 101, No.16, 6th building, 9th ...