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Question: Is a welding consumable with a nickel content of 1.03% acceptable or is 1.00% the maximum allowed?
Answer:
For carbon and low-alloy steels, 1% nickel has been set to be the maximum to avoid SSC. However, a value above 1% could be used if it is qualified as stated in A.2.1.4. It is not the role of the Maintenance Panel to give an opinion on a specific metallurgical issue.
This question is in relation to NACE MR0175/ISO 15156-2 Clause 5.3.1.4
Reference: ISO 15156 Maintenance Panel Inquiry #2009-20
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