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Old 02-26-2019, 04:45 PM
BTromblay BTromblay is offline
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Default English material specs needed.

Hi,

I have several projects coming up and I'm looking for English aluminum material specs. Im looking for aircraft and general use English aluminum information, including strengths of material. I need the info for my component documentation and proper American material substitution.

Thanks

Bill
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Old 02-26-2019, 06:10 PM
AllyBill AllyBill is offline
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Hi Bill,

Let me know what you need and if l don't have it l will know someone who does.

Will
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Old 02-26-2019, 10:08 PM
BTromblay BTromblay is offline
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Originally Posted by AllyBill View Post
Hi Bill,

Let me know what you need and if l don't have it l will know someone who does.

Will
Hi,

I think the easiest way to start is, what were the top five common aluminum alloys used during WW2?

B
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Old 02-27-2019, 09:25 AM
Peter Tommasini Peter Tommasini is offline
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I have done a little bit of aircraft work, all I know is that the material that the aircraft people supplied me with, was 3/4 hard and it was annealed in some sort of salt baths, then we wheeled, and when hard again, it was annealed again, then wheeled again till the desired shape was achieved. No flame or heat of any kind was allowed! What a job that was
Peter
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Old 02-27-2019, 03:15 PM
cvairwerks cvairwerks is offline
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Bill: I did some cruising through the Spitfire drawings I have access to. The Brits did stuff weird on their drawings. The few that I could find material specs on, show just a D.T.D. number, and one BOM listed the materials as Dural and Alclad, with spec numbers. I did run across a pointer on another board, to a file with the D.T.D. numbers and the spec descriptions.
Here's a link, and it should be of some help.

https://www.scribd.com/doc/197257502/Dtd-List
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Old 02-27-2019, 04:00 PM
crystallographic crystallographic is offline
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Quote:
Originally Posted by cvairwerks View Post
Bill: I did some cruising through the Spitfire drawings I have access to. The Brits did stuff weird on their drawings. The few that I could find material specs on, show just a D.T.D. number, and one BOM listed the materials as Dural and Alclad, with spec numbers. I did run across a pointer on another board, to a file with the D.T.D. numbers and the spec descriptions.
Here's a link, and it should be of some help.

https://www.scribd.com/doc/197257502/Dtd-List

"Obsolete" is a common term in this list. "Aluminum-silicon sheet" is one that was a no-go decades ago.
I surmise that eliminating the obsoletes will make the remaining choices easier to obtain and use, and it never hurts to use a higher-grade alloy where applicable.
Kermit may have a crossover material list over at Fantasy, in FL. Paul might be able to help you.
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Old 02-27-2019, 07:26 PM
AllyBill AllyBill is offline
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Quote:
Originally Posted by BTromblay View Post
Hi,

I think the easiest way to start is, what were the top five common aluminum alloys used during WW2?

B
It's pretty much all 2XXX for anything structural in varying degrees of hardness/temper, much of it Alclad. (a thin layer of 1XXX rolled over the underlying alloy for corrosion protection, the trade-off being that it's marginally heavier when new and an absolute bitch to weld for restorations so many years later as there is often corrosion at the boundary between the layers that you just can't see.)

Unstressed items like engine cowlings and fairings were often made of 1XXX that you can push around with your fingers.

If you can give me a DTD (Directorate of Technical Development) or BS (British Standards) spec' I'll tell you what it is in modern language.

Will
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Old 02-27-2019, 08:30 PM
crystallographic crystallographic is offline
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Quote:
Originally Posted by BTromblay View Post
Hi,

I think the easiest way to start is, what were the top five common aluminum alloys used during WW2?

B

Hi Bill,

I'd recommend borrowing/renting an alloy gun for the day you have all your PiQ (parts in question) laid out to solve the alloy ID mysteries therein:
http://electricaltechno.com/products...er-PMI-Gun-NDT
or perhaps NiB:
http://www.tzsupplies.com/olympus-in...6500-i4979029/
(Prices are down a LOT from 10 years ago )


(Love seeing the old XP82 flying now)
XP82.jpg
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Last edited by crystallographic; 02-28-2019 at 12:11 PM.
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Old 02-27-2019, 09:36 PM
BTromblay BTromblay is offline
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Quote:
Originally Posted by Peter Tommasini View Post
I have done a little bit of aircraft work, all I know is that the material that the aircraft people supplied me with, was 3/4 hard and it was annealed in some sort of salt baths, then we wheeled, and when hard again, it was annealed again, then wheeled again till the desired shape was achieved. No flame or heat of any kind was allowed! What a job that was
Peter
Yup, more than likely 2024 material.

Thx
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Old 02-27-2019, 09:40 PM
BTromblay BTromblay is offline
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Quote:
Originally Posted by cvairwerks View Post
Bill: I did some cruising through the Spitfire drawings I have access to. The Brits did stuff weird on their drawings. The few that I could find material specs on, show just a D.T.D. number, and one BOM listed the materials as Dural and Alclad, with spec numbers. I did run across a pointer on another board, to a file with the D.T.D. numbers and the spec descriptions.
Here's a link, and it should be of some help.

https://www.scribd.com/doc/197257502/Dtd-List
Thanks, this is what I'm looking for. From the dtd number and can find the material grade and spec, then find an American equivalent with my material manuals.

Thx
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