AMS QQ-C-320 3

[vc66]

Hi All-

I have a callout on a drawing for Hard Chrome Plating per AMS QQ-C-320. The note gives the thickness of the coating. I have been looking around, and I can't find references to state that this standard is current. Has it been replaced? If so, what is the applicable standard in effect? Do you have any information regarding this or the current standard, such as proper way to callout on a drawing (thickness, required hardness, etc).

Thanks for the help, in advance.

Regards,

V

Mechanical Engineer
"When I am working on a problem, I do not think of beauty, but when I've finished, if the solution is not beautiful, I know it is wrong."

- R. Buckminster Fuller

 

[btrueblood]

vc66,

I usually start by looking on

http://global.ihs.com/,

they usually are pretty good at listing older specs and their revision/cancellation/supercession notices.

It helped here, showing QQ-C-320 (I seem to recall this was originally a FED-STD?) to be superseded by SAE AMS-QQ-C-320, which itself has been superseded by SAE AMS 2460 (revised 2007).

 

[CoryPad]

While Global is helpful, you couldn't say it is an authority. You can use ASSIST to find current status (and free copies) of USA government and military standards:

http://assist.daps.dla.mil/quicksearch/

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

 

[IRstuff]

see:

http://assist.daps.dla.mil/quicksearch/basic_profile.cfm?ident_number=50938

Currency is always relative. If your customer expects compliance to the drawing, then you need to either convince the customer to change the drawing, or use the older spec.

Unless the new spec is EXACTLY identical to the old one, expect to have to requalify if you use the new spec.

TTFN

FAQ731-376

 

[vc66]

Aha... Thanks to all three. I have found exactly what I need.

Stars all around!

V

Mechanical Engineer
"When I am working on a problem, I do not think of beauty, but when I've finished, if the solution is not beautiful, I know it is wrong."

- R. Buckminster Fuller