Alum shroud alloy

[Jep]

I'm trying to identify the aluminum alloy used for the front and rear shrouds on my 56 BN4. Does anybody have the info, or if there is an updated compatible equivalent? I need to do some patching, and don't want to screw it up! Thanks for any help I can get!

 

[CLEAH]

https://www.acmefluid.com.au/larry/jensenweld.html

 

[Keoke]

I'm trying to identify the aluminum alloy used for the front and rear shrouds on my 56 BN4. Does anybody have the info, or if there is an updated compatible equivalent? I need to do some patching, and don't want to screw it up! Thanks for any help I can get![/QUO

16 S.W.G. aluminium-manganese alloy to B.S. 1470 N.S.3.

 

[Jep]

Thanks, after digging around in the Brit. Standards it looks like B.S.1470 is also our 1050, which is avail. here.

 

[CraigC]

B.S.1470 is not the alloy designation. The NS3 is what you need to cross reference. From what I can find, it most closely crosses to 3103.
That said, I believe that 3003 is more commonly used by those who create aluminum body panels. Back in another life I worked for a firm that cut, machined and sold aluminum. 3003 was purchased by a few specialty shops for this purpose.

 

[Jep]

Thanks, I'll look into that.

 

[BoyRacer]

3003 is virtually the same alloy and it is readily available here in the US up to 4' x 8' sheets. It is easily weldable, easy to anneal and relatively inexpensive. Buy it in the .060 thickness ( maybe its .062") to use as repair material for your front and rear shrouds.

 

[Randy Forbes]

Nearly thirty (<30) years ago, I had a good-ol-boy Cajun aluminum boat & truck bumper builder do the aluminum repairs on my car; sectioned two (2) rear shrouds to make one (1) and some flange and tear repairs to the front shroud.

I can guarantee that he didn't use anything special, but he sure could handle a TIG torch! I had told him ahead of time that they were notoriously hard to weld, but he felt otherwise. I believe his name was Pat Miller, if you ever need any aluminum work down around Opelousas, LA!