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What is the difference between HY 80 and HLES 80 steel?
Gokul43201 said:HY specification is a US system, while the HLES specification is used in Europe and Asia. I'm quite sure that they both refer to the same steel (not sure if the numbers remain the same though) - a highly weldable steel often used in making hulls for ships and subs.
The main difference between HY 80 and HLES 80 steel lies in their composition and properties. HY 80 is a high-strength low-alloy (HSLA) steel with a tensile strength of 80 ksi, while HLES 80 is a high-strength low-alloy steel with enhanced toughness and ductility, also with a tensile strength of 80 ksi.
Both HY 80 and HLES 80 steel are commonly used in marine and naval applications due to their excellent strength and corrosion resistance properties. Additionally, they are also used in the construction of offshore oil and gas structures, pressure vessels, and military vehicles.
HY 80 and HLES 80 steel are classified as HSLA steels, which means they have a lower carbon content and contain other alloying elements such as manganese, nickel, and chromium. This results in a higher strength-to-weight ratio compared to other types of steel, making them ideal for use in high-stress environments.
Both HY 80 and HLES 80 steel have excellent weldability, but they do require special welding procedures and precautions due to their high strength and low carbon content. Preheat and post-weld heat treatment may be necessary to prevent cracking and ensure the desired mechanical properties are achieved.
No, HY 80 and HLES 80 steel have different properties and applications, and they cannot be used interchangeably. HLES 80 steel is specifically designed to have better toughness and ductility compared to HY 80 steel, making it more suitable for certain applications such as naval vessels and offshore structures.