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Posted by simonP on April 27, 2006, 4:22 pm
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Hello,
Thanks to all the contributors on this forum I can now DC tig weld
aluminium.
Which brings me to my next problem - What grade of filler rod should I
be using?
The bodywork is for an Aston Martin - One book that I have describes it
as Aluminium/Magnesium alloy of commercial grade half hard.
Another problem that I have had is hairline cracking - when I grind
the weld level I sometimes get a short crack that is only just
noticable; it runs along the joint. Is this poor preperation /
technique or incorrect filler etc?
I have been using 5356 filler rods so far.
Thanks,
Simon
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Posted by Dave P. on April 28, 2006, 3:23 am
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not knowing the parent metal your dealing with I'd try 4064 filler it's less
crack sensative
than 5356 (more ductile of a weld)
Dave
> Hello,
>
> Thanks to all the contributors on this forum I can now DC tig weld
> aluminium.
>
> Which brings me to my next problem - What grade of filler rod should I
> be using?
>
> The bodywork is for an Aston Martin - One book that I have describes it
> as Aluminium/Magnesium alloy of commercial grade half hard.
>
> Another problem that I have had is hairline cracking - when I grind
> the weld level I sometimes get a short crack that is only just
> noticable; it runs along the joint. Is this poor preperation /
> technique or incorrect filler etc?
>
> I have been using 5356 filler rods so far.
>
> Thanks,
>
> Simon
>
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Posted by Dave P. on May 2, 2006, 12:32 pm
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> not knowing the parent metal your dealing with I'd try 4064 filler it's
> less crack sensative
> than 5356 (more ductile of a weld)
> Dave
Sorry
corection, meant to say 4043 (posting after midnight with drink in hand)
Dave
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Posted by hubert on April 28, 2006, 1:07 pm
Please log in for more thread options > Hello,
>
> Thanks to all the contributors on this forum I can now DC tig weld
> aluminium.
>
>
what did you end up using? helium?
i have a Dc tig machine , and some aluminium welding work coming soon.
cheers,
hubert
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Posted by Ernie Leimkuhler on April 28, 2006, 7:34 pm
Please log in for more thread options
> Hello,
>
> Thanks to all the contributors on this forum I can now DC tig weld
> aluminium.
>
> Which brings me to my next problem - What grade of filler rod should I
> be using?
>
> The bodywork is for an Aston Martin - One book that I have describes it
> as Aluminium/Magnesium alloy of commercial grade half hard.
>
> Another problem that I have had is hairline cracking - when I grind
> the weld level I sometimes get a short crack that is only just
> noticable; it runs along the joint. Is this poor preperation /
> technique or incorrect filler etc?
>
> I have been using 5356 filler rods so far.
>
> Thanks,
>
> Simon
It may be 3003 which is used on many cars and planes for the skin.
You can use either 5356 or 4043.
4043 is softer, more malleable, more shock resistant and has a lower
melting point so it flows a bit better.
5356 is stronger, harder and more corrosion resistant.
--
Welding Instructor - South Seattle Comm. Coll.
- Divers Institute of Technology
CWI/CWE
WABO Examiner
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>
> Thanks to all the contributors on this forum I can now DC tig weld
> aluminium.
>
> Which brings me to my next problem - What grade of filler rod should I
> be using?
>
> The bodywork is for an Aston Martin - One book that I have describes it
> as Aluminium/Magnesium alloy of commercial grade half hard.
>
> Another problem that I have had is hairline cracking - when I grind
> the weld level I sometimes get a short crack that is only just
> noticable; it runs along the joint. Is this poor preperation /
> technique or incorrect filler etc?
>
> I have been using 5356 filler rods so far.
>
> Thanks,
>
> Simon
>