silver solder ?

[berger]

i have found a carboard packet that came out of my dads garage with these rods in it , i'v found out they don't like to be bent like soft solder they break . can anyone throw any light on what they might be ? i'v found out castinux on google is to do with spain. i bet my dad borrowed them when he was in the reme or a foreman fitter many years ago.  correction i misread it , castinox is spaain.

[berger]

sorted it's for filling cracks in cast iron.

[Joolstacho]

Yes, Silver Solder is nothing like that. It can look like silver coloured brazing rod, or it can be like a flat strip.

[chaterlea25]

Hi Berger,
That's interesting
I remember an elderly friend telling me about his father soldering cast iron using copper sulphate (bluestone) as a flux
This would have been pretty WW2.

Talking about weird solders I have a roll of solder called "Alutin"
Apparently it will bond with aluminium  and then lead tin solder can be used to join the tinned area's 

John

[berger]

hi john my brother sent me part of a page out of an old welding book, it says CASTINUX REPAIRS as the heading and castinux can be used on water jacketed cylinder heads and blocks without any pre heat but can't be use where a crack leads to solid metal,

[berger]

thanks jools brother has shown me the strips of silver solder and i think i have some i took out of my dads garage after his death, i will go on another hunt.