7178-T651 Mil-Hdk-5D Material properties thread2-188255
7178-T651 Mil-Hdk-5D Material properties thread2-188255
(OP)
Could someone please let me know, in order of preference, how to:
1) download a pdf of Mil-Hdbk-5D.
2) download a pdf of the mechanical properties data for 7178-T651 Extrusion from Mil-Hdbk-5D.
3) reply with the properties (especially the yield and ultimate bearing stress allowables for 1.5 & 2 e/D).
Thank you
1) download a pdf of Mil-Hdbk-5D.
2) download a pdf of the mechanical properties data for 7178-T651 Extrusion from Mil-Hdbk-5D.
3) reply with the properties (especially the yield and ultimate bearing stress allowables for 1.5 & 2 e/D).
Thank you





RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
Regards,
Cory
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
If you go here
http://assist.daps.dla.mil/quicksearch/
and type in "Mil-Hdbk-5", you'll get 5H and 5J.
5D is ancient history (as is 5H and 5J for that matter).
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
I found in some older threads that the material type that I am looking for is in Mil-Hdbk-5D. I need it from this particular source as this is for aircraft design and rework (MatWeb won't be acceptable). I've been told that this alloy was from a certain airframe manufacturer. I don't know if Kaiser would have any information especially at this level (sufficient to please the FAA). I had already spent hours on the web trying to find information there, to no avail.
I believe that I might be able to order a rev D from IHS, but at a cost of >US$250. Could someone please explain to me how all of these documents (it is not just Mil-Hdbk-5) that were paid for by our tax dollars and offered freely to any and all previously, now can only be obtained at such an unreasonable cost (the current revisions are $500)? Is there any law against someone that has older paper copies from pdf'ing them and making them available on the web for free or perhaps at a more reasonable cost?
But I digress. I'd be happy with any of the information requested in the original post for now.
Thanks
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
It would appear that in my eagerness to respond, I missed the specificity of the request.
My earliest hardcopy is -5F.
OnAQuest –
I was able to dig this up in my stack of stuff:
Thickness ≤.061-
Fbru 107ksi (e/D=1.5)
131ksi (e/D=2.0)
Fbry 99ksi (e/D=1.5)
106ksi (e/D=2.0)
Thickness .062-.249-
Fbru 109ksi (e/D=1.5)
134ksi (e/D=2.0)
Fbry 99ksi (e/D=1.5)
106ksi (e/D=2.0)
These are "A" basis values for 7178 T6511/T6510 (QQ-A-200/13 extrusion).
Hope that helps.
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
For this year only, MMPDS-01 and MIL-HDBK-5J will be technically equivalent. In the spring of 2004, when the 1st Change
Notice of MMPDS-01 is published, MIL-HDBK-5 will be designated noncurrent and MMPDS will become the only governmentrecognized
source in the U.S. of published design allowable properties for metallic commercial and military aircraft structures
and mechanically fastened joints. In this way, the 65-year legacy of MIL-HDBK-5, and its predecessor ANC-5, will be
maintained."
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
I have seen the "This year, 2003, marks the first year of publication of the MMPDS Handbook..." already. The last line "...In this way, the 65-year legacy of MIL-HDBK-5, and its predecessor ANC-5, will be
maintained." is simply not true as there has been a lot of useful data deleted over the various revisions. This post being a good example. I wonder how much of what gets published is supplier selected?
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
did you try assist today ... "doc description" = "mil-hdbk-5" didn't hit our target (i'm sure it did in the past)
mil-hdbk-5.org now supports only MMPDS (sigh)
some of my older bookmarks have given up the ghost
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
Internet search vs. contacting a knowledgeable supplier that is integral to populating aerospace industry documents with materials information - not a difficult decision.
Regards,
Cory
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
The Assist site was where I used to go for those older versions. They used to be included in the IHS historical docs, but no more.
No to mention my mentor, who had hard copies of all those docs, back to ANC-5, has passed on.
Just reinforces my pack rat behavior when it comes to collecting data.
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
All MIL-HDBK-5s (MIL-HDBK-5 [1962] thru MIL-HDBK-5J) are available thru IHS Specs & Stndrds. Just search for MIL-HDBK-5 (without a Rev letter) and they will all show-up.
And Yes... I have handy access to all MIL-HDBK-5 versions plus MMPDS-01-thru-03 AND ANC-5... because I work on a REALLY old large acft. For the antique (obsolete) alloys and/or specs the he old books are the "only" place to find allowables... and the newer materials (MMPDS) are the available... but not necessarily equivalent... subs.
Regards, Wil Taylor
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
Your copies aren't pdf's are they? If so, could they be made available? Perhaps on disk to keep from upsetting the IT folks? If not, could I please get a copy of at least the page(s) dealing with 7178-T651 extrusion?
Thanks
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
i guess that raises an interesting question, who has the copyright of the original docs ? IHS are making pdfs available to people who buy them; what's to stop someone who has a paper copy from posting it as a pdf ?
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
I am reluctant to distill/send only the pages for 7178 from -5D for the following reason:
There are SUBSTANTIAL differences in allowables for 7178 [sheet/plate-bare/clad; all forgings; all extrusions) between MIL-HDBK-5 (1962), MIL-HDBK-5A-Rev C4 (1970), and MIL-HDBK-5D-Rev C2 (1985). In this case, the allowables appear to drop substantially between 5 & 5A-C4... then vary slightly between 5A-C4 & 5d-C2. GAAAAAAAAAAAAAAA!!!!! as Dilbert would say....
-------------------------------
"CAUTION/WARNING" to all who analyze obslete alloys such as 7178... and even some of the "current generation" materials:
"Migrating Allowables" present a serious challenge-obstacle-trap: you need to be VERY carefull which "MIL-HDBK-5 Revision" You choose to select allowable values from! USUALLY I recommend allowables that would equate to the exact material spec (and spec revision) and/or signing date(s) on the engineering drawing.
Note: there are too many potential reasons for changes in the allowables tables to discuss here...
Note: I also have copies of old (archived) "company" design manuals and the Batelle Aerospace Metals Handbooks as "back-up" sanity-check sources. CAUTION: the "comapny" manuals also show similar trends in allowables (migrating).
Regards, Wil Taylor
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
I don't believe that there is a copyright on MIL-HDBK-5. So you would be in the clear if you had non-proprietary access, i.e. hardcopy or .pdf.
The "sticky wicket" comes into play when you access the document through an online or CD/DVD subscription service. SAE required that server access be limited to locations within 5 miles of the physical server. That became a problem as the server was 20 miles from the hangar where I was.
In any event, Wil is right about being cautious about using values for 7178 found in the old handbooks. The data I posted was dated 1990, with the caveat "For Existing Design Only".
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
In the the mid 1980s I was able (privilaged) to attend several MIL-HDBK-5 comittee meetings as the sole USAF-ALC rep non-voting observer [NOT same as voting AFMC/ASD/AFWAL reps]. Coincidentally most of the voting members were also MIL-STD-1312 and MIL-STD-1515 (fastener) comittee members who discussed related work on-the-side.
What impressed me the most was the massive use of statistics to derive "the simple numbers on the tables". Also, all voting members were acutely aware that as test-sample populations increased, so did the overall confidence in the derived data. Problems with data accuracy were often evident as material fabricators (ALCOA, ALCAN, KAISER, etc) submitted "spec" qualification test data... and the data variations affected the statistically derived "simple numbers on the tables".
In "extreme materials", such as 7178, the allowables varied remarkably over time (usually downward).
In more stable/popular materials properties such as 2024, 7075, etc... A and the B basis allowables have "generally" migrated upward from "S" [spec] basis allowables... all because manufacturers learned the nuances of alloying, heat treating, forming, straining (sheet, plate, extrusion, forgings) etc... the material for optimum/stable mechanical/physical properties (and usually improved SCC & corrosion resistance... etc).
Regards, Wil Taylor
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
http:/
"OKAY
Here's the latest from P&W
The Aeronautical Vestpocket Handbook can be purchased from P&W Technical Publications at $36.00 each. (Note: The Helpdesk had mistakenly quoted you the 2003 price).
Please fill out the attached form and mail it with a check or money order made payable to Pratt & Whitney to the following:
Pratt & Whitney
Attn: Sandra Parker
M/S 132-30
400 Main Street
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Regards,"
Not free, but $36 isn't bad.
Dave
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
see attached. Disclaimer: poster does not assume any liability arising out of the application or use of the subject material data. The user assumes all responsibility for the use of the provided information.
Regards
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
Thank you very much for the information. This has been quite a task. I understand that this particular alloy is bit of a wandering target and will make this understood to my peers. Fortunately our usage is such that we generally only need to show that it has reasonable strength properties.
Thanks again
Dave
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255
RE: 7178-T651 Mil-Hdk-5D Material properties thread2-188255