tubing strength

I checked through:

ASME Sec II Part D
ASME B31.3
Aluminum Design Manual

But it's a shame - they didn't have 6061-0, however, I did come across it in ASM Metals Handbook Vol 2:

5052-0 : Tensile - 28 ksi; Yield - 13 ksi; Fatigue - 16 ksi
6061-0 : Tensile - 18 ksi; Yield - 8 ksi; Fatigue - not listed

If you need more authoritative answers - I would recommended getting mill test certificates.

As for the strength of tubing at 20 psi - Yes, there will be plenty of strength for, even the worst case, 0.625" dia - 0.035" wall.

But if you need to assert that - I would recommend ASME B31.3

Hi, Guest here again -

I got thinking and digging some more, mainly because I don't deal with aluminum that much - and came up with a couple more things.

Depending on which specification you go with:

According to ASTM B210:

5052-0 has a Tensile Strength, min 25.0 ksi; max 35.0 ksi - Yield min 10.0 ksi
6061-0 has a Tensile Strength, max 22.0 ksi - Yield max 14.0 ksi

And then I came across the other specifications from AMS, namely 4071 & 4080 - I have never come across those before so I don't know anything about them.

So you could look into obtaining those specs.

Lastly -

Those strengths are for room temperature, they would, of course, be different for elevated/lower temperatures.

I thought of another issue, too ....... bending. Of course when you bend tubing you stretch it and will get a thinner wall, however, according to ASME B31.3 you only need approx. 0.002" for that pressure.

Hi Guest

Thanks for the leads trying to get the AMS specs

I know either material is strong enough especially at room temp where they will be.

Just getting all the "proof" for the feds.

Thanks again