I have been trying to identify the material used on one of our applications. I have found the material stamp and its manufacturer. The material does not have an AISI number that I have found though ASME, but I did find a material in SA-240 of Section II that has the exact composition. The AISI UNS# is S43940 and it has an EN#1.4509. Another European company, is saying that there is an AISI # 441 for this same material, but this is the only reference to this AISI#441 that I have found. Can I determine from the SA-240 chemical composition match that it is an acceptable material? I believe that is the case, but please give me your input. Please advise.
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