Nitronic 50 NACE

Inquiry regarding the Use of Nitronic 50 with Table A.3

NACE MR0175 recently received an inquiry regarding the use of Nitronic 50 (UNS S20910) with Table A.3. If you require technical support on Nitronic 50, please contact OGC Energy.

Can Nitronic 50 Be Used “”hot Worked”” and “”cold Worked””?

The inquiry asks if Nitronic 50 can be used “”hot worked”” and “”cold worked”” if preceded by an annealed treatment. The sender wants someone from NACE to confirm if their interpretation is correct.

Response from NACE

The response explains that Table A.3 permits the use of UNS S20910 in the solution annealed and cold worked condition, provided that the hardness does not exceed 35 HRC. The solution annealed condition is also acceptable. NACE MR0175/ISO 15156-3 Table A.2 permits the use of listed materials for any equipment or components, stating “”S20910 is acceptable in the annealed or hot rolled (hot/cold worked) condition at a maximum hardness of 35 HRC””.

However, the standard does not use expressions such as “”should be used”” or “”can be used”” for limits given in the tables. The inquiry should be rephrased to specifically ask if UNS S20910 can be used in hot worked conditions for the limits given in Table A.3. This was not clearly addressed in the standard, and the ISO 15156 Maintenance Panel would need time to discuss.