Use of stainless steel alloy as umbilical tubes in seawater environment

   
   

The invention relates to a ferrite-austenitic alloy and its use, the alloy has a composition with a mixture defined as: C maximum 0.05%, Si maximum 0.8%, Mn 0.30-1.5%, Cr 28.0-30.0%, Ni 5.80-7.40%, Mo 2.00-2.50%, N 0.30-0.40%, Cu maximum 1.0%, W maximum 2.0%, S maximum 0.010%, 30-70% ferrite and the balance austenite for tubes filled with hydraulic fluid, as transport tubes for solutions for chemical injection, or another uses in the application of umbilicals.

A invenção relaciona-se a uma liga ferrite-ferrite-austenitic e seu uso, a liga tem uma composição com uma mistura definida como: O máximo 0.05% de C, máximo 0.8% do silicone, manganês 0.30-1.5%, cr 28.0-30.0%, Ni 5.80-7.40%, Mo 2.00-2.50%, N 0.30-0.40%, máximo 1.0% do cu, máximo 2.0% de W, máximo 0.010% de S, o ferrite 30-70% e o austenite do contrapeso para os tubos encheu-se com o líquido hidráulico, como os tubos do transporte para soluções para a injeção química, ou uns outros usos na aplicação dos umbilicals.

 
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