Shipbuilding Industry

The ship is driven in water for many years, especially in sea transportation. The working environment in spring is harsh and corrosive. Therefore, stainless steel is widely used in ships. As early as the 1950s, the speedboat propeller shaft was made of 20Cr13 martensitic stainless steel. Later, large ships began to use 06Cr17Ni12Mo2, austenitic stainless steel, 06Cr25Ni5Mo2 duplex stainless steel and 07Cr17Ni7Al precipitation hardened stainless steel to make propellers; ship engine exhaust system was made of 06Cr17Ni12Mo2 steel; turbine blades were made of 12CrMo and 05Cr17Ni4Cu4Nb precipitation hardened steel; non-magnetic engine was adopted. Manufacture of Cr-Ni austenitic stainless steel; kitchen equipment made of 06Cr19Ni10 and 06Cr17 steel; transport food, chemical tanker and refrigerated ship shell made of 06Cr18Ni9 and 06Cr17 steel; liquefied natural gas transport ship with low temperature performance of Cr-Ni austenite Made of stainless steel; mineboat submarine is made of 022Cr21Ni17Mo2N and 022Cr22Ni13Mo3N steel; marine shaft and heat exchanger are made of 022Cr22Ni13Mo2N steel; patrol boat propeller, propeller shaft and rudder are made of 06Cr25Ni6Mo3CuN steel.