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Exaton 27.7.5.L

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Exaton 27.7.5.L is a Hyper duplex (austenitic-ferritic) filler metal with improved yield strength and better pitting and crevice corrosion resistance compared to Super duplex stainless steels (UNS S32750 and S32760). It also has higher HISC (hydrogen induced stress cracking) resistance compared to Super duplex stainless steels and higher resistance to aggressively sour environments. Exaton 27.7.5.L can be advantageously used for welding 13% Cr flow pipes, as its high strength enables reduction of repair rates during pipeline production, because finite element analysis is not required for weld metal of matching strength and the acceptance criteria can be less conservative. The high pitting resistance of Exaton 27.7.5.L makes it suitable for root pass welding of UNS S32750 (e.g. SAF™ 2507), UNS S32760 and other Super duplex stainless steels when the risk of pitting corrosion is critical. Exaton 27.7.5.L is used for joining and plasma welding, but primarily used for overlay welding using hot wire TIG and mechanical TIG. For exampel tube sheet welding in heat exchangers or for joint welding of Hyper duplex, UNS S32707 (SAF™ 2707 HD), pipe.

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Exaton 27.7.5.L

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