This standard applies to forged parts made of carbon structural steel, alloy structural steel, stainless acid-resistant steel and heat-resistant steel for medium and low-speed marine diesel engines except crankshafts.
CB/T 778-1986 history
2011CB/T 778-2011 Specifications for marine diesel engine steel forging
1986CB/T 778-1986 Specifications for steel forgings for marine diesel engines