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Aluminum Shroud repair material

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John Loftus

John Loftus

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I have read that the Healey aluminum shrouds were contructed from 16 SWG Aluminium - Magnesium Alloy, BS (British Standard) 1470 NS3. Does anyone know an equiv. US standard of Aluminum alloy to the 1470 that can be used for welded in patches?

Is the 16 SWG a reference to gage thickness? I thought Aluminum came in thickness, not gage.

Cheers,
John
 
Hi John, my interpretation of 16 SWG is: 16 Standard Wire Guage. Do not know how that applies to aliminum sheet.However, when patching my shroud I simply used the AL material wich was availble in the shop,I could not tell you what it was.---Keoke
 
John, the BS 1470 is a now obsolete standard, and the NS3 referred to the composition of the material.
NS3 translates into 3103 in todays alloy.
The nominal thickness for 16 SWG aluminum sheet is .0508"
Aluminum is still measured in "gage", but the thickness is different for steel and aluminum. 16 gage steel is .059"
Jeff
 
Thanks guys .. just the info I was looking for. One other thing .. does it matter if the aluminum is heat treated or should I look for the 3103 in O condition.

-John
 
John, if the AL is going to be worked it will require heat treating {Stress Releaving} after the repairs are complete.---Keoke
 
John, 3103 is a strain hardened alloy. 'O' would be like butter. I would use 3103 H14. (Old designation, 3103 H4.) The material should not require further treatment after welding, as the loss of strength at the weld is minimal.
Jeff
 
I don`t know about you guys but I just finished the repairs on the front shroud on Lynnes BT7 and I welded in 2 small patches in the lower front shroud and plugged a radio antenna hole I used 5052 and tig welded them in and they worked great. Skip
 
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