If Carburizing is acceptable surface treatment method, can the max hardness (HRC 22) and Nickel content (max 1%) of the core of carburized part be allowed to be higher than what NACE MR0175 allows?

Not applicable.

This question is in relation to NACE MR0175/ISO 15156-3 Annex A.1.5.1

Reference: ISO 15156 Maintenance Panel Inquiry #2013-04Q3

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