Float Flyr
Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland
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 Posted: Wed Feb 01, 2012 3:34 pm Post subject: Warning Regarding 4130 Tube Sources |
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For those of us interested in aircraft
Noel
From the fly soob list.
Hello All!
Recently I have purchased a good bit of 4130 tube. Here at Thunder Aviation
we
test every batch of material we will be using and have
had some very disconcerting results. This particular batch came from a major
supplier of aircraft products. Once it was unloaded we took several random
samples and performed pull tests with shocking results. So we then pulled
several more samples for x-ray. We received 4130 chrome moly with as many
as 18
inclusions per inch! This is without a doubt junk material. We had a
similarexperience from a second major supplier and a nightmare issue with
some
5052 aluminum that would barely weld. The problem with the chrome moly is by
looking you would never have realized a problem. Without testing I wonder
how
much of this material is out there flying around now?
My best advice folks is to require a supplier to certify country of origin
when
ordering such materials. And only accept materials from the US and Germany.
We
have found no issues with materials from these two countries.
Tom Parker
Thunder Aviation
http://thunderaviationengines.com
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_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats |
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