GB 5310- 2008 standard is applicable to seamless tubes for making steam boiler whose pressure is high or higher and seamless tubes used as pipelines.[……]
20MnG high pressure boiler pipe is a high manganese carbon carburizing steel, the hardenability, strength and plasticity than 20 steel cutting performance also improved, good low temperature impact toughness and weldability. Used to manufacture camshafts, gears, couplings, hinges, pin towbar, crankshaft bearing rings.[……]
The GB5130 standard is mainly used to manufacture high pressure and above pressure steam boiler tubes with high quality carbon structural.