[Jewelry making - Article 00086] - Re: [Orchid] Using MAPP gas for silver work?

[James Binnion]

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>     it is hotter than acetylene and oxidizes less than propane, is only
>     expensive in cannisters, not at the welding supply companies. MAPP
>     is a proprietary patented gas 

    Acetylene is the hottest available fuel gas, you cannot find
    anything hotter but it is unstable at elevated pressure. MAPP was
    designed to allow for running at a higher working pressure with
    almost the same temperature as acetylene that some specialty jobs
    require. 

    Acetylene max combustion temperature in oxygen 5720 F
    MAPP max combustion temperature in oxygen 5300 F
    Hydrogen max combustion temperature in oxygen 5133 F
    Propane max combustion temperature in oxygen 5090 F

James Binnion
jbin AT mokume-gane.com
James Binnion Metal Arts
http://www.mokume-gane.com
360-756-6550
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