HY - 80 The Submarine Steel: Facts to Know

HY-80 is a high-tensile, high yield strength, low alloy steel. It was developed for use in naval applications, specifically the development of pressure hulls for the US nuclear submarine program and is still currently used in many naval applications.The first production submarines to use HY-80 steel were the Permit class. These reportedly had a normal operating depth of 1,300 feet, roughly two-thirds the crush depth limit imposed by the steel.

Manufacturing of HY -80

HY-80 steel is a member of the low carbon, low alloy family of steels with nickel, chromium and molybdenum (Ni-Cr-Mo) as alloying elements and is hardenable. The weldability of the steel is good, though it does come with a set of challenges due to the carbon and alloy content.[12] The carbon content can range from 0.12 to 0.20 wt% with an overall alloy content of up to 8 wt%. It is also used extensively in military/navy applications with large thick plate sections that add to the potential weldability problems e.g. ease of heat treatment and residual stresses in thick plate.

The primary objective during the development of the HY- grades of steel was to create a class of steels that provide excellent yield strength and overall toughness, which is accomplished in part by quenching and tempering. The steel is first heat treated at 900 degrees Celsius to austenitize the material before it is quenched. The rapid cooling of the quenching process produces a very hard microstructure in the form of martensite.Martensite is not desirable and thus it is necessary for the material to be tempered at approximately 650 degrees Celsius to reduce the overall hardness and form tempered martensite/bainite.

Uses of submarine

Submarines are most prominent in navies; however, they are also used in other venues. In recent decades, they have become much more commonly used as a research tool as well. They allow scientists to travel deep into the see and study deep water sea life. Not long ago, the depths of the oceans were a mystery, no one had been deep enough to see what really existed beneath the surface. With submarines, however, researchers are allowed a safe way to study the deep sea, without having to die doing so. What a concept.

Submarines have also become more popular in tourism. Mostly in warm climates, these vessels will take tourists close to the ocean floor, in a dry, safe medium. These submarines use the same concepts as those used in the navy, however, they are produced on a much smaller scale, with out some of the cool gadgets, like torpedoes.

Submarines are great tools that can be used for various different things. They are used by the navy, researchers and tourism companies to explore, and navigate areas that are not accessible with a scuba tank and a wet suit.

Steel power 

The steel power is leading the humans either it is in land or sea. Steel companies in UAE, expects more demand for submarine steels as many countries develop  submarines as their military defence and attacking tool.So let's think how far the uses of steels in our daily life.Steel is a simple metal which can be used both in food plate or a warship. If every resource is used positively we can have more fruitful results otherwise it will destroy your peace and the happiness of society.