guide to annealing ally
https://makeitfrommetal.com/how-to-...minum requires very,to soak through the metal.
and the soap goes brown at the right temp (quick answer)!
https://makeitfrommetal.com/how-to-...minum requires very,to soak through the metal.
and the soap goes brown at the right temp (quick answer)!
tis an alloy of aluminium and magnesium.
see https://en.wikipedia.org/wiki/Birmabright
and you can use either!
Did you read the link I put up on annealing? It tells you about this and other ways of doing it!
jamesmartin
Well-Known Member
its not birmabright no 90 or110 ever was
neilly
Well-Known Member
Did you think of giving him time to read it , both your posts were #21 and #22 for crying out loud...
Cheers
Never knew that, did that stop with the series then?
jamesmartin
Well-Known Member
last series were aluminum,sometime in the 70s they switched,hence the greater rot in the bodies
Yeah in the meanwhile, not having noticed these two posts I did a search and found this
http://funrover.com/history/defender-body-panels-are-not-birmabright/
Interesting that others have tried to replicate it and failed. can't imagine why.
Bir Metals developed the alloy ... Bir metals, as in BIRmingham metals - hence ....
All here:-
https://en.wikipedia.org/wiki/Birmabright
Also, I didn't mention soap melting .... I said burns - as mentioned in other later posts Soap going black indicates the correct temp for annealing alluminium alloy.
Indeed. Not what I would be doing either.
Yes, but, it'll burn all the paint off - you have to decide which route to follow ... I'd be trying to get it all back in shape with the minimum of force, take your time, and do as little damage to the paint as possible.
If that fails then you might have to anneal, shrink the required areas, anneal again - and repeat as required ....then you get to paint it...
Tim4x4
Well-Known Member
timross.
I have spoken to friendly bodywork person who says "from the photograph it appears to him that it is possible to complete an effective repair on the damage shown without annealing the material first" he went on to say that the amount of material in the area would rob the heat so major dismantling would be required to be able to anneal the affected area properly. So in his opinion again his words" just tease the material back to shape by cold working" he would use hydraulic pushers and limit the hammering.
Tim
Tim4x4
Well-Known Member
A company named Birmingham metals was located in the Smethwick area but had nothing to do with Birmid.
Birmid came about by the joining of two companies BIRmingham aluminium castings and MIDland Motor Cylinder Co Ltd this was long before Birmid started the company Birmetals.
So Birmetals who manufactured birmabrite comes from Birmid metals not Birmingham metals.
Also James Martin is correct in this statements of no 90 or 110 are made with Birmabrite from the factory. Also the last series were not Birmabrite bodies Land Rover had lost confidence in Birmetals to supply consistent quantities of sheet Birmabrite so looked for an alternative supply.
The repair that TIMROSS wants to complete is of a vertical face if soap melts at 140F will it still be on the face of the dented material when it reaches its annealing temperature of 770F if it does I stand corrected.
A much more accurate indicator would be temperature indicating paint manufactured for the task such as:-
https://www.mcmaster.com/temperature-indicating-paint/temperature-points~750degreesf/
Tim
