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  • Users: JohnMagna
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  1. JohnMagna

    Heat treat Spec PS 10R41

    Looking for an Old heat treat spec. for an Old AM General part, the part is a Shim-SAE 1075 Where can I get a copy of this spec. PS 10R41 is what is on the Print.
  2. JohnMagna

    Wet Grinding 52100 shims

    we have too many shims in a thicker size and want to grind these down to the thinner size, all other dimensions are the same except thickness. Going to be wet Ground as the 52100 material is already HRC 58 Min. I am thinking that at a minimum a percentage of the shims need to be etched for...
  3. JohnMagna

    Blast debur a Ferritic Nitrocarb part

    We have several parts that are Carburized then blasted to remove machining burrs, had a part that is Ferritic Nitrocarb that has the potential of having some light burrs. The requirement is to have a .010mm white layer on the part, thoughts on blast deburring parts with this process and not...
  4. JohnMagna

    Material spec. SCM 20??

    We are quoting several parts that the material is designated SCM 20. This is a Japanese part. Any idea of what the material is and where to get a copy of the spec? I have googled this and come up empty!! Currently trying to get this without going back to the potential customer as these parts...
  5. JohnMagna

    Retained Austenite on 20MnCr5 material

    Have a forging that gets machined, Carburized, Hardened and Temper, then machined some more on a few dimensions. The customer requirements are <25% retained austenite in the functional area's, They are evaluating this optically @ 500X to photo standards all the way to the very surface. Using a...
  6. JohnMagna

    Hard turning with coolant--Rust

    Material is 20MNCr5 +HH+FP Parts are Carburized, hardened and tempered, then Hard Turn several dimensions with Coolant. From the machining operation they go into a washer that in the rinse has a rust preventative. The rust preventative is good for at least 30 days, we have parts some of these...

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