Permissibility of UNS S20910 in Hot Worked Conditions under NACE MR0175

This page features a question regarding the permissibility of UNS S20910 in hot worked conditions under NACE MR0175.

Understanding Table A.3

The answer provided states that Table A.3 allows cold working up to 35 HRC, provided that the material undergoes a preceding solution annealing cycle.

Acceptability of UNS S20910 in Hot Worked Conditions

UNS S20910 is acceptable in hot worked conditions as long as it is subsequently solution annealed and cold worked to 35 HRC, or if it is free of cold work intended to enhance mechanical properties and has a maximum hardness of 35 HRC.

Condition of UNS S20910 in Hot Worked Conditions Followed by Cold Working

However, the condition of UNS S20910 in hot worked conditions followed only by cold working to enhance mechanical properties is not addressed in Table A.3. Changing Table A.3 to permit this condition would require a successful ballot.

Conclusion

This question pertains to NACE MR0175/ISO 15156-3 Table A.3, and the reference cited is ISO 15156 Maintenance Panel Inquiry #2014-09R.