Does Annealing Age Hardened HF or CD QQ-N-286 make everything equal?
Does Annealing Age Hardened HF or CD QQ-N-286 make everything equal?
(OP)
I was wondering if The Annealing process of Rod & Bar made all things equal in HF & CD.
I realize in QQ-N-286, Table III it refers to note 3 which says, applicable to both HF & CD.
I just didn't know if this also included properties like grain structure etc.
I realize in QQ-N-286, Table III it refers to note 3 which says, applicable to both HF & CD.
I just didn't know if this also included properties like grain structure etc.





RE: Does Annealing Age Hardened HF or CD QQ-N-286 make everything equal?
Hmmmm... another alloy I'm unfamiliar with.
Carefully re-read QQ-N-286. I think what you want to know is embedded within the spec [word-search 'grain']. The ASTM specification for grain size determination, plus several other relevant citations about grain, are present and are fairly explicit.
CAUTION.
The following referenced MIL-STDs are DoD/USN 'Controlled Distribution', which means You have to have a 'need-to-know' to get them. IF serious about using this material then You should have them for a complete understanding of it... and MAY include info on how to control, and inspect-for, this alloy's grain size/quality.
MIL-STD-1684 - Control of Heat Treatment.
MIL-STD-2132 - Nondestructive Examination Requirements for Special Applications.
Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
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RE: Does Annealing Age Hardened HF or CD QQ-N-286 make everything equal?
HF and CD+annealed are not the same product.
If you look at data for HF+age vs CD+ann+age you will see different sets of properties.
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
RE: Does Annealing Age Hardened HF or CD QQ-N-286 make everything equal?