Keywords
Citation
(1998), "Steel offers cost-effective solution to improved corrosion resistance", Anti-Corrosion Methods and Materials, Vol. 45 No. 3. https://doi.org/10.1108/acmm.1998.12845cad.006
Publisher
:Emerald Group Publishing Limited
Copyright © 1998, MCB UP Limited
Steel offers cost-effective solution to improved corrosion resistance
Steel offers cost-effective solution to improved corrosion resistance
Keywords British Steel, Corrosion, Steel
An advanced stainless steel developed by British Steel Engineering Steels reportedly offers offshore operators improved corrosion resistance as well as greater strength and toughness characteristics. It is believed that demanding offshore specifications can be achieved for the first time without the high cost associated with adopting expensive duplex stainless/super austenitic or nickel-based alloys. The material, known as SF13/2/5, a super 13 per cent Cr martensitic steel, made its debut at the Offshore '97 exhibition.
SF13/2/5 has a composition of 13 per cent chromium, 2 per cent molybdenum and 5 per cent nickel and can be used for tubing, casing and line pipe, as well as for accessories such as flow couplings and pup joints. It also claims sufficient strength levels for use in valves.
The steel was developed in response to the need for a material able to fill the gap between standard 13 per cent chromium grades and expensive duplex materials. The aim was to design a solution offering improved corrosion resistance in a CO2 environment containing a small amount of hydrogen sulphide. Initial design and development of this grade has been published. Extensive corrosion tests are said to confirm that SF13/2/5 offers superior corrosion resistance in comparison with standard 13 per cent chrome alternatives.
Hugh Everson, product technology manager for offshore steels at Engineering Steels, explains: "Standard 13 per cent chromium steels are well established in the UK North Sea. Our aim was to respond to the needs of offshore operators by developing a material offering improved performance at minimum extra cost. SF13/2/5 is the result of years of research and development and the initial response from the marketplace is extremely positive."
Further details available from: British Steel Engineering Steels, UK. Tel: +44 (0) 1709 382141; Fax: +44 (0) 1709 826352.