Incoloy 925 bolts for sour gas & chloride application

Q: I have down hole application containing sour gas and high chloride levels. The temperature the bolts are exposed to is around 150F and I’m having trouble with cracking. I tried Super Duplex 2507 but am still having issues. Any ideas?

A: Super Duplex 2507 does provide good resistance to stress corrosion cracking, pitting and crevice corrosion in warm chloride environments to around 570 F, but I think in combination with the sour gas, and perhaps stress of your operation, it may need something more robust. A great material for a combination of sour gas, chloride, high strength and temperatures to consider is Incoloy 925. Down-hole oil & gas rely on this material for its excellent resistance to sulfide stress cracking and stress-corrosion cracking in H2S environments. It has a high operating temperature of 1200°F which is well beyond what you need. It is also has a much higher yield strength (120 ksi) compared to Super Duplex 2507 bolts of 82ksi.

This entry was posted in Application, Corrosion Resistance, FAQs, Material, Specialty Metal Fasteners, Technical Questions and tagged , , , , , , , , . Bookmark the permalink.

Leave a Reply

Your email address will not be published. Required fields are marked *

Fragen?

Unsere Materialexperten stehen bereit, Sie bei Ihrer spezifischen Anwendung zu unterstützen.

Kontaktieren Sie einen Experten