Ask the company requesting the quote. I doubt they would be offended by a question that is asking for clarification of the material.
I'm sure other companies are wondering about the material as well, but were afraid to ask.
I've actual have gotten jobs because I went back and asked questions about materials, welding requirements, and in some case have suggested something more easily obtained.
Best regards - Al
I have to wonder if somebody copied the numbers & letters off some material, not realizing the difference between the alloy designation and the "other" designations
I did ask them, but they were even more clueless then me. I don't have the availability of going through all of their quote documents as this is just a very small part of the total. They were content to use the 6061 material. I put that in the quote so they know what they would be getting from me if we get the work.