Does the MR0175/ISO 15156-2, 7.3.2 also apply to low-alloy martensitic steels such as CA6NM which is in fact considered a CRA (MR0175/ISO 15156-3)?
No, it does not. Please see ISO 15156-3, 6.2.1 and ISO 15156-3, A.6.2, Table A18.
This question is in relation to NACE MR0175/ISO 15156-2 Clause 7.3.2 and 7.3.3
Reference: ISO 15156 Maintenance Panel Inquiry #2004-18 Q2