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Can specifications from one standard be used to validate for other specifications (ASTM or BAC) 2

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brandnew11

Aerospace
Jun 13, 2024
3
i've attempted to look for this however can't seem to find a specific answer.

We came across an issue where the values were out of range however the supplier responded with utilizing ASTM to indicate values can be rounded down. However the specification was based on BAC5619 where there is no reference to ASTM, only potentially AMS.

So the question i have, can a standard from ASTM be used to justify specifications that are based on another standard such as BAC?

thank you
 
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to be more precise:

A supplier has used this comment: "Declared to 2 sig figures per ASTM E18 (rounding to ASTM E29)" but the spec used to meet the hardness value is based on BAC5619.

For the particular question at hand BAC5619 will indicate a value of 34 - 38 but the measured value came to 38.2; can ASTM be a valid reason to not flag a value being above tolerance from another specification?


 
Do you have on hand or purchased ASTM E29 (Standard Practice For Using Significant Digits in Test Data to Determine Conformance with Specifications) to review the guidance given? By title alone, E29 sounds like it is an appropriate standard for deciding significant digits and rounding data.

I understand you question after reading it again, and it is out of my expertise. You aren't questioning the rounding, you are questioning the applicability of using an ASTM guidance to BAC based specification.
 
Brian Malone -
Thank you for your response. Correct i am only questioning the applicability of using an ASTM guidance to BAC based specification.

MintJulep -
Thank you for your response as well. Obviously from my question i was leaning towards telling the supplier that i do not see a connection between one standard excusing values of a completely different standard where there is no connection or reference, but i needed to make sure.
 
Agreed. Unless ASTM references this outside standard (something I don't think I've ever seen in an ASTM published standard), it's moot.

If I was working with an ASTM specification I would only refer to an outside standard if I was 100% sure ASTM didn't have the content already covered in some way. And even then it would be informational / reference only.
 
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