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plain non-colour sandstone

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plain non-colour sandstone [message #22171] Wed, 05 January 2011 16:03 UTC Go to previous message
avatar stop4stuff  is currently offline stop4stuff
Messages: 3193
Registered: June 2010
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Following the dipsapointment of having a model (Flugel Horn) rejected for 2mm parts being under the now 'staturory' 3mm wall thicknes, I have decided to try another avenue to get the horn model made in metal.

I have a quantity of a Bismuth-Tin alloy with a melting point of 138 celcius that is suitable for casting.

I checked the materials properties for Sandstone with a view to making a mould, the datasheet says 280 celcius heat deflection temperature but the materials page gives 60 celcuis as the heatproof temperature.

Am I correct in thinking that heatproof temperature is for the wax infused colour sandstone and that the plain non-colour sandstone would be good for much higher temperatures (max temperature as a mould would probaly be no more than 150 celcius)?

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