Weld hardness criteria according NACE - SA-240 S31254
Weld hardness criteria according NACE - SA-240 S31254
(OP)
Dear Engineers,
Could you please give me your opinion on the below questions that refer to NACE and hardness criteria?
Thanks in advance for your contribution.
Best regards,
Weldpuzzle44
Question:
What is the hardness criteria pertaining to Base Metal and Heat Affected Zone of weldments made of material SA-240 S31254 according NACE MR0175 (ISO 15156-3)?
If no criteria defined in NACE, does it make sense to use the criteria from material specification SA-240 (223 Brinell and/or 96 rockwel B)?
Could you please give me your opinion on the below questions that refer to NACE and hardness criteria?
Thanks in advance for your contribution.
Best regards,
Weldpuzzle44
Question:
What is the hardness criteria pertaining to Base Metal and Heat Affected Zone of weldments made of material SA-240 S31254 according NACE MR0175 (ISO 15156-3)?
If no criteria defined in NACE, does it make sense to use the criteria from material specification SA-240 (223 Brinell and/or 96 rockwel B)?





RE: Weld hardness criteria according NACE - SA-240 S31254
Yes, you can refer to the solution annealed hardness of the base material per the material specification (SA 240).
RE: Weld hardness criteria according NACE - SA-240 S31254
I also found the below answer in NACE MR0175 interpretations (www.iso.org/iso15156maintenance)
Answer to MP INQUIRY #2005-13
"There are no hardness limits for the HAZ of welds of corrosion-resistant alloys when there are no hardness limits in the tables or the text of the document for the base material”.
RE: Weld hardness criteria according NACE - SA-240 S31254
Referring to SA240 and other standards is good practice.
RE: Weld hardness criteria according NACE - SA-240 S31254