Hello Bill,

The NHB5300.4 (3A-2) was preceded by NASA-STD-8739.3, December 1997.
Below is a website that has this standard listed.
http://standards.nasa.gov/database/nasanumsrch.asp?number=8

The cleaning solvent we've had approved in the microelectronics lab
is Axarel 2200 with a deionize rise although for spot cleaning we only
use the isopropyl alcohol.

Hope this helps

-Sherry


>Fellow tech-net readers:
>
>Does anybody know if the NASA soldering spec NHB5300.4(3A-2), dated  1992 is
>going to be revised ? In many different ways it is behind the times.
>
>One area of my concern is the limited number of solvents that can be used
>according to paragraph 3A312 of this document. Most of the materials listed
>are Ozone Depleting Chemicals, which are more or less banned. We're using
>isopropyl alcohol.
>
>Has anyone working to this spec gotten any different materials for cleaning
>flux, approved by NASA?
>
>Anyone out there using FluxoffCZ, from Chemtronics, for any applications?
>
>Please respond through the net or if you prefer, directly to me at
>[log in to unmask]
>
>Thanks,
>Bill Kasprzak
>Moog Inc.
>
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