Is Hy 80 corrosion resistant?
HY-80 is considered to have good corrosion resistance and has good formability to supplement being weldable. Using HY-80 steel requires careful consideration of the welding processes, filler metal selection and joint design to account for microstructure changes, distortion and stress concentration.
What type of steel is HY 80?
low alloy martensitic steel
HY 80 is a high strength low alloy martensitic steel containing small additions of chromium and nickel to help with corrosion resistance and is supplied in the Type B condition bright finish.
What metal is used for submarines?
steel
High-strength alloyed steel is still the main material for submarines today, with 250–350 metres (820 to 1,148 feet) depth limit, which cannot be exceeded on a military submarine without sacrificing other characteristics. To exceed that limit, a few submarines were built with titanium hulls.
What is NQ1 steel?
The pressure hull containment structure of the submarine is fabricated from high strength steel known as Naval Quality 1 (NQ1) to the highest standards.
How thick is submarine steel?
Making the hull. 4 Steel plates, approximately 2-3 in (5.1-7.6 cm) thick, are obtained from steel manufacturers. These plates are cut to the proper size with acetylene torches.
How thick is the skin of a submarine?
After the war the Navy built several fast attack submarines. These had hulls about an inch and a half thick. They had a test depth of 700 feet. The same hull thickness and quality of steel was used on the early nuclear submarines.
How deep can US Navy subs go?
It’s generally accepted that the maximum depth (depth of implosion or collapse) is about 1.5 or 2 times deeper. The latest open literature says that a US Los Angeles-class test depth is 450m (1,500 ft), suggesting a maximum depth of 675–900m (2,250–3,000 ft).
What is in the conning tower of a submarine?
The submarine’s attack center, the Conning Tower, is an 8-ft diameter, 14-ft long cylindrical chamber directly above the control room. The conning tower houses both the search and attack periscopes, the main steering station (called the helm), the firing buttons for the 10 torpedo tubes, and the ST and SJ radars.
Why was Hy 80 used in submarine hulls?
HY80 was first used by the US, UK and Australian Navy for the construction of submarine hulls where high strength and toughness was necessary to withstand water pressure at depth, but the alloy had also to exhibit excellent fabrication properties to allow the welding of complex structures.
How big is a Hy 80 steel plate?
HY 80 Military High Strength Steel Hy 80 is a High Strength Steel. This quenched and tempered martensitic steels Ni-Cr-Mo alloy grades meet 80 ksi (552 Mpa) yield strength levels with a transverse dynamic tear test requirements at -40°F (-40°C) of 450 ft-lbs. (610J). Hy 80 is producted to 8 inches (203 mm) thick.
What’s the difference between Hy 80 and Hy 130?
HY-80 is accompanied by HY-100 and HY-130 with each of the 80, 100 and 130 referring to their yield strength in ksi (80,000 psi, 100,000 psi and 130,000 psi). HY-80 and HY-100 are both weldable grades; whereas, the HY-130 is generally considered unweldable.
What kind of corrosion resistance does HY-80 steel have?
HY-80 is considered to have good corrosion resistance and has good formability to supplement being weldable. Using HY-80 steel requires careful consideration of the welding processes, filler metal selection and joint design to account for microstructure changes, distortion and stress concentration.