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  1. doakra

    Boron Content of 10B21

    The material is .548" in diameter. It is being cold formed into 3/8" nuts and then heat treated. We generally don't have a problem with this, but we have a shipment of wire that the boron content is .0009%. It is generally in the area of 0.015%. This material doen't seem to want to harden...
  2. doakra

    Boron Content of 10B21

    What is the minimum boron content for 10B21 that will give consistent hardness of 28-32 Rc after heat treat? Thanks

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