Can precipitation-hardened austenitic steel UNS S66286 be used at higher temperatures in the absence of chlorides?

Answer:

This inquiry pertains to NACE MR0175/ISO 15156-3 A.8, Table A.26, and the reference cited is ISO 15156 Maintenance Panel Inquiry #2005-02 Qa.

According to Table A.26 in NACE MR0175/ISO 15156-3, the temperature limit for UNS S66286 is restricted to 150°F and 15 psi H₂S in the presence of any combinations of chlorides. It is important to note that NACE MR0175/ISO 15156-3 does not define the expected performance of UNS S66286 in environments that do not contain chlorides.

Contact us for further assistance

For further assistance regarding the selection of materials suitable for specific environments and intended service, please do not hesitate to contact us.