Interpreting NACE MR0175/ISO 15156 Table A.2 Maximum Hardness Requirements for Austenitic Stainless Steels

This page provides answers to a common question regarding compliance with NACE MR0175/ISO 15156, Table A.2, and the maximum specified hardness requirements for austenitic stainless steels. The question revolves around whether surface hardness values above the maximum specified in MR0175 are compliant, and the need for clarity on the hardness requirements to ensure a uniform product is provided to the standard.

Understanding Compliance with NACE MR0175/ISO 15156

The answer provided by NACE is that they cannot specify where to take hardness impressions and readings or any other alloy, as NACE MR0175/ISO 15156 is not a quality assurance document. Instead, it is the alloy supplier’s responsibility to meet the hardness and metallurgical requirements in Table A.2 for austenitic stainless steels.

Expert Assistance for NACE MR0175 Compliance

If you require assistance with NACE MR0175 compliance of austenitic stainless steels (such as 304, 316, 316L, etc.), Oil & Gas Corrosion is available to help. This question pertains to NACE MR0175/ISO 15156-3 Clause 6.2.1, and the reference cited is ISO 15156 Maintenance Panel Inquiry #2003-06.

By working with an expert in NACE MR0175 compliance, you can ensure that your austenitic stainless steel products meet the necessary hardness and metallurgical requirements, and are fully compliant with the standard.