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6 cyl Bristol cars Type 400 to 406 - restoration, repair, maintenance etc

aluminium

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Old 01-03-10, 02:17 AM
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Quote:
Originally Posted by UK6 View Post
Mike,
I suspect that the original aluminium would be very similar to the modern 3003 grade.

Brett
The original was NS4H3 / 5251 , this is a magnesium alloy.I have talked with Bristol cars on this. 3003 is a manganese alloy and is softer but okay -- used a lot on panel vans and buses.

In my opinion the best quality to use would be 5083 "0" it is what I have supplied to RR for the new car bodywork. expensive of course.
5251 is 1.5% mg and 5083 is 4.5% mg the higher the magnesium the better the strength and corrosion resistance in this application.

I bet you wished you had never asked
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Old 01-03-10, 02:22 AM
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And for panel work glue is not a bodge and is definitely the future -- remember the alochrome to protect.
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Old 02-03-10, 12:35 AM
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Default aluminium

Thanks very much to all who responded re. ally welding

I do have a couple of sheets of ally I bought from a local stockist a little
while back but unfortunately havn't a clue what they are.

I also have to figure out what filler rod to use, I have some 5356 but
wonder if perhaps 4043 might be better as I think I've read that this is
less suseptable to cracking.

Mike
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