Re-normalisation of 17/4 PH
Re-normalisation of 17/4 PH
(OP)
Recently a supplier misread a drawing and heat-treated a batch of 17/4 ph components to H1025 instead of H900.
Shouldn't this be a straight forward case of re-normalising the material, and following the correct heat-treat specification to achieve H900.
Or are there other factors that should be a consideration?
Thanks in advance for any information.
Shouldn't this be a straight forward case of re-normalising the material, and following the correct heat-treat specification to achieve H900.
Or are there other factors that should be a consideration?
Thanks in advance for any information.





RE: Re-normalisation of 17/4 PH
The problem is distortion if the components are in a final machined condition. To prevent further problems the heat treatment should be in a reducing atmosphere to avoid further oxidation during the anneal treatment.
Make sure you get all heat treatment information from this vendor. if they can misread a drawing they can misread controls for heat treatment.
RE: Re-normalisation of 17/4 PH
We use 1900-1925F, you then have to cool to below 90F before you start the aging treatment.
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P.E. Metallurgy, Plymouth Tube
RE: Re-normalisation of 17/4 PH