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Development history of submarine steel

Posted:2021-05-26 10:34:04

With the rapid development of submarine, submarine steel has also been developed rapidly. Before 1940, all submarines in the world were made of low carbon steel. The yield strength of steel was only 220MPa, and the submergence depth of submarines was relatively shallow.

From 1940 to 1958, the United States used carbon manganese low alloy high strength steel HSS with yield strength of 340MPa to build submarines, which increased the submergence depth of submarines up to 100200m and improved the concealment of submarines. In 1958, the United States began to use the Ni Cr Mo quenched and tempered low alloy high strength steel HY-80 with yield strength of 550MPa to build submarines (HY-80 is the abbreviation for the minimum value of high yield strength 80ksi). On the basis of this steel, HY-100 steel was developed by heat treatment method. The yield strength of the steel reached 690MPa, which further increased the submergence depth of the submarine and improved the technical and tactical performance of the submarine.

In 1963, the United States began to study HY-130 steel with yield strength of 890MPa, which is expected to be used in submarine construction. Compared with the United States, the development of submarine steel in Japan is relatively late, but the development speed is quite fast. Before 1960, NS63 steel with yield strength of 290MPa was mainly used in Japanese submarine construction; From 1959 to 1966, Japan mainly used NS46 steel with yield strength of 450MPa to build submarines; From 1967 to 1977, Japan mainly used NS63 steel with yield strength of 620MPa to build submarines; From 1975 to the end of the 20th century, NSS0 steel with 780MPa yield strength was mainly used to build submarines; After 1990s, Japan began to use NS110 steel with higher yield strength to build submarines, and its application scope is expanding. In the former Soviet Union, submarine steel developed rapidly, mainly using AK series steel to build submarines, such as AK-25, AK-27, AK-33, AK-43, AK-44, etc.