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  1. Ewan FI

    17-4 PH

    We have a plan that should hopefully give us a better understanding of where the bending occurs in our manufacturing process. I suspect we will find that it's the annealing as pointed out to me but time will tell! This will involve us machining another batch of Axles and varying the process so...
  2. Ewan FI

    17-4 PH

    I have just had an interesting phone conversation with a supplier who has supplied us complete Axles in the past. Strangely enough they have used the same heat treatment shop and have had problems with them overheating parts. It was suggested that we machine the axles from 17-4 PH H900 and not...
  3. Ewan FI

    17-4 PH

    I have just done a bit more searching on 17-4 PH on the forums and one post states that the material is annealed as a large coil, straightened and then chopped into lengths. This could add some work stress to the raw material. Ironic metallurgist - Thanks. I tend to agree (with my limited...
  4. Ewan FI

    17-4 PH

    That is certainly part of our plan but I was looking for some advice from someone familiar with 17-4 HP. Someone's thoughts on whether the annealing is necessary. Or plan is to send them a batch and have them anneal half and return them for measurement. Assuming they are OK we will return...
  5. Ewan FI

    17-4 PH

    I'm sure they would argue that the failure is not their problem. We have asked them to heat treat to harden and that is exactly what they have done.
  6. Ewan FI

    17-4 PH

    We manufacture a Measuring Axle from 17-4 PH. We buy in the material in Annealed state and machine this in house to the form we require which approximates to a 350mm long x 35mm dia "dog bone" shape with the center being machined to a 15mm square cross section. We leave a couple of diameters...

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