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Thanks for your comments. I'm looking forward to getting underway with weld trials. The stud is a non-standard size so we have to get them made to our drawing. Thanks again everyone who responded. Jim

Thanks again for your help. You have given me much more confidence that using a weld stud will provide the best solution to my design problem. Regards Jim

Thank you for your response. I should point out that because my skills are not in welding but in electro-mechanical assemblies, I have to rely on others to confirm or otherwise that my design schemes are practical. I have 'browsed the web' for info and found a good deal of data on the subject...

I propose to use a 4-40 UNC weld stud as a replacement for a length of studding in a tapped hole. Although the weld stud principle is well documented, I haven't yet found a definitive answer to this question: Is it only the fused pip of the stud which provides the strength or does the welded...

Thanks for the replies. It's given me some useful areas to explore. Jim

ISUClone Thanks for the tip. I will look into eddy current testing techniques for more clues. Jim

Drdick Thanks for your interest in my problem. The stainless steel is BS S143 which apparently is martensitic and is to Rolls Royce spec MSRR6647. I'm not a materials expert so can't really elaborate on that. The prescribed heat treatment is as follows: 1050degC (1922degF) for 1 hour. Argon...

We have a problem with an apparent change in the magnetic properties of a stainless steel component which forms part of a magnetic circuit. The problem can be accounted for by a drop in material permeability The stainless steel is heat treated to achieve the required strength. The BH curves...