... 6~120W 1500~3600L 6000~1800020g,16MngGB713—19978Steel plates for pressure vessels20R,16MnR,15MnNbR,16MnDRGB6654—1996GB3531—19969Steel plates for building structuralH ... use in construction, petrochemical refining, oil platforms, marine offshore costruction, pressure vessel factory, power generation, naval and military steel fabrication, machined metal ...