I haven't moved to the analysis part yet. We have been exploring the approach - magnetic particle at 1/2 amp value, using residual magnetism, degreasing and performing FPI.... We inspect aerospace parts and I don't have a confort level of accepting based on a catch all phrase. Last week - Air...
Good feedback from all of you and I do appreciate it. I kind of think that this grade is more suspect to ferrite or stringer indications than the more refined PH steels. I think that when we do find the condition, the most logical approach is to perform metallography and build some history...
If you are only interested in screening substandard material, there is a correlation between conductivity and hardness for aluminum alloys. There is also a correlation between hardness and tensile (ASTM E18). If you have access to the charts, you could correlate conductivity values with...
We often find magnetic particle indications that run in the long axis of tubing made from 4340. It is sometimes dense and runs the entire circumference. When we sand the indications, they remain intact. Is this a common occurance for tubing material (i.e. are these swage marks)? Is it...
Thanks Mike. We are a metal finishing operation and do not perform the heat treat. Our effort is focused on inspection and finishing (cad, nickel....). I appreciate your quick response.
Regards,
Bob Potter
My company inspects 17-4 & 15-5 PH steel. We ofter find a Banding Condition when performing magnetic particle inspection. Following metallography, we find that the Banding may be accompanied with non-metallic inclusions and/or ferrite stringers. There is minimal information regarding the...
