Bob:

My interpretation agrees with yours.  The inclusion of 2024 and 6061 in
section 2 simply means they are called out in the body of the
specification.  In this case, it is because those alloys are used for
process control testing.  If application of the specification was
limited to specific alloys, I'd expect it to say so in the Scope or
Notes sections.  I see no such limitation.
We have cast a large number of parts that are then chem filmed prior to
paint.  It is not a problem.  Also, what are you asking them to certify?

Rich MacConnell
 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Perkins
Sent: Wednesday, March 29, 2006 4:00 PM
To: [log in to unmask]
Subject: [TN] Mil-C-5541E Chemical Conversion Coating Aluminum Alloys

Hi

I have a supplier that is casting an Aluminum 380 enclosure for us and
is requested to meet MIL-C-5541E standard.  They are coming back and
saying that the Aluminum 380 is not covered under this particular
specification as their interpretation of MIL-C-5541E is the standard is
only referring to the Aluminum Alloy 2024 and Aluminum 6061. Therefore
they are reluctant to stand behind the certification we are requesting.
Does anyone have more experience at this than we do as I understand the
spec to included all Aluminum and Aluminum Alloys, not only specific to
the Alloys called out on page 2 under the federal specifications.

Thanks in advance,

Bob Perkins
Apex Micro Mfg.

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