[Jewelry making - Article 00412] - Re: [Orchid] 95-5 Plaladium as casting Alloy

[Teresa Frye]

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Jim,

    We have been using Hoover's 950 TruPd as a casting alloy with good
    results. It is definitely a very tricky alloy to cast (as is the
    case with all Pd) but if you have a good platinum casting system and
    use an induction machine with vacuum and argon back fill you should
    be able to get good castings. Palladium really likes to absorb gas so
    torch melting would be a difficult method at best. 

    Another caution is the flow of this metal. It has behaved well with
    most designs, however filigree and very thin walled pieces have had
    a tendency to no-fill when compared to the same designs in platinum. 

    Other than that, the as-cast hardness is decent at Hv110 (although
    I'd like to see it at 135 and Hoover is working on that) and the
    recycle ability is good. Laser is great with Pd, and I agree with the
    last post that lasering with argon is better. 

    I am writing a paper on palladium casting for Santa Fe Symposium
    this year so a lot more experimentation and information to come! 

Teresa Frye
TechForm Advanced Casting Technology
Portland OR
503-652-5224

 
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