High manganese containing steels for oil gas and petrochemical applications

Abstract

Provided are high manganese containing ferrous based components and their use in oil, gas and / or petrochemical applications. The components include 5 to 40 wt% manganese, 0.01 to 3.0 wt% carbon and the balance iron. The components may optionally include one or more alloying elements chosen from chromium, nickel, cobalt, molybdenum, niobium, copper, titanium, vanadium, nitrogen, boron and combinations thereof.

Description

technical field [0001] The present invention relates to the field of steels containing high manganese (Mn). More particularly, the present invention relates to the use of such manganese containing steels for oil, gas and petrochemical applications. Background technique [0002] Cryogenic structures such as liquefied natural gas (LNG) vessels require steel with specific cryogenic properties. The steel needs to maintain ductility and crack resistance with a high level of security even at low temperatures (<-100°C). It must also have high strength so that the wall thickness of the tank can be reduced, which leads to lower construction costs. Regular carbon steel loses much of its toughness and becomes brittle at low temperatures. Steels commonly used for cryogenic structural applications are alloy steels such as Fe-9wt%Ni steels, austenitic stainless steels (such as 304SS with Fe-18wt%Cr-8wt%Ni), Invar alloys (Fe-36wt% %Ni) and aluminum alloys. [0003] Aluminum alloys ...

AI Technical Summary

Problems solved by technology

However, tube erosion remains a serious problem and alternative tube structures or materials are required to provide more economical operation

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