HSLA Steels

[arcpro]

What are HSLAs and their applications in petrochemical industry?

[ben]

1. High strength low alloy steels falls in between th category of carbon steels and low alloy steels.
2. They have little alloying about 0.1% by weight
3. Normally killed
4. Used where strength, toughness is required

[mechcolor]

In addition to what ben has mentioned, HSLAs normally contains elements such as vanadium, niobium and titanium. These elements are added to have a fine and small grain as they modify the structure.
They are used for many piping systems and pressure vessels requiring increased toughness.

[ashfaqanwer]

Would like to add few more lines:
a. HSLA steels are typical fine grained low alloy steels.

b. In HSLA steels, the C content is lowered to below 0.1% and the desired strength is achieved by refinement of ferrite grain size produced by micro alloying of aluminium, vanadium, niobium and titanium.

c. They are also called micro alloys.