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"Salt Fog Cabinet Setting for ASTM B117 vs. ISO 9227"



February 25, 2010

The screw passed the NSST under ISO9227 (96H without Zn corrosion and 240H without metal corrosion), while it failed the Assembly NSST at about 96H under ASTM-B117.
Please coach where is the NSST Cabinet Setting difference between ASTM B117 [affil. link to spec at Techstreet] and ISO 9227 [affil. link to spec at Techstreet] .

Paul Yan
product designer - Shanghai, China
^


March 1, 2010

Paul,

The differences between ASTM B117 and ISO9227 are relatively minor. I can't imagine how parts can pass one test while failing the other. If these have been done by the same Laboratory I would ask them what the differences were between the two tests that they carried out.

Brian Terry
Aerospace - Yeovil, Somerset, UK
^


March 2, 2010

Not a shock. The screw was damaged during installation in the larger component. If it is stainless, use a high nickel low iron diver/wrench. If it is plated, be as gentle as you can and hope.

James Watts
- Navarre, Florida
^


March 29, 2010

Dear Paul Yan,
we are not able to see that much difference between the ISO 9227 and ASTM B117

But, very important in the both a testing, you followed all the parameters in exact n ot.
For example angel, salt conc., Air pressure, etc.... in both a process.

Kannan Boopathi
- Salem, Tamil Nadu, India
^

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