The problem we have is getting
>> information about what Filler Wire these guys in the States are using
>> and (if any) special blend of Argon. The best Filler wire we have
>> been able to get here is a generic type PZ6500 with 3 1/2% nickel
>> mix. While this produces a reasonable looking Cap...it still falls
>> somewhat short of what those American Race Car Chassis builders are
>> producing. Is there any way you could find out for me just what it is
>> that they use when welding 4130 Chromemoly tube. Cheers Warrick
>>
>> Warrick and Donna Smith
>
When I was TIG welding any of the nickel blends, I had a mixture of
95/5 Argon Hydrogen 95% Argon and 5% Hydrogen blended by the
welding gas supplier in one tank. makes for a very pretty smooth weld,
HOWEVER we never had any x-ray or structural testing done of the resulting
welds. so I would recommend those be done considering the parts you stated
were being worked.
Also kept the post-flow gas set for a long time to allow the weld to cool
and be protected
by the cover gas. most folks keep postflow short to economize on gas
costs, but I liked
to keep the weld area protected..
Can,t remember the filler rod off hand, but will see if I can find the
catalog..
NOTE:
NEVER try to blend the gases yourself or use separate Argon and Hydrogen
tanks..
not worth the risk.. Our gas supplier came through fine,.after we explained
what we were
after..
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