Model Boat Mayhem
The Shipyard ( Dry Dock ): Builds & Questions => Steam => Topic started by: nick_75au on January 01, 2010, 07:57:27 am
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I have a copy of the AMBSC code for building small boilers, it specifically states silver brazing (containing phosphorus) and copper phosphorus rods shall not be used. Does anyone know the reason?
Nick
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Nick,
Happy new year in Oz!
A tentative answer to your question till John (Bogstandard) sees it and gives the authoritative answer :}
I seem to remember that the phosphorous causes or can cause embrittlement in the joint - I think it affects the rate of cooling and the strucure of the soldered joint.
For a boiler we are requiring properties of strength with ductility and corrosion resistance, and generally phosphorous increases hardness at the expense of ductility.
rgds
andrew
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Unfortunately John is no longer a member
peter