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  • Users: Opher
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  1. Opher

    Need to test a pin for brittleness.

    The pin is Heat treated, tempered to 58RC, oil quenched, in an open air over. I'm beginning to think my good pins are austempered, salt quenched and the tempering is in a controlled atmosphere oven. Why would you austemper in salt vs. temper in oil? Austempering preserves ductility. I'm...
  2. Opher

    Need to test a pin for brittleness.

    Thanks. What is the Charpy Impact Test? Where can I get info about it, preferably free.
  3. Opher

    Need to test a pin for brittleness.

    I have two lots of .059x.972in. pins made from 52100 steel. Both tempered to RC58. One lot bends almost 90deg., with pliers, before breaking. The other snaps like glass at 5-10 degrees of bend. I need a standardized test to perform post heat treatment to test for brittleness. I was thinking...

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