Copper Water Pipe Properties

[cnuk]

I am doing an advanced FEA analysis that involves permanently forming a copper water pipe (C12200 ASTM B88). My problem is that I cannot find any DETAILED stress-strain curve information that includes the nonlinear yielding portion of the curve....all that's normally listed in elastic modulus.

Does anyone know where I could find this type of detailed information for copper water pipe? It seems like something that must have been done a hundred times and be in the public domain. I've checked

http://www.copper.org

but they too don't offer that detailed information. The cost to do this test for me is prohibitive.

Thank You

 

[btrueblood]

http://www.copper.org/resources/properties/144_8/144_8.html

 

[cnuk]

Thanks for the response, but I don't see water pipe material listed in the curves. I've seen copper pipe referred to an 106, but never 102, 122, or 220. Are you implying that I can use one of the curves listed? I ruled them out because I didn't think they applied.

Thanks

 

[metengr]

cnuk;
You have asked this question before-see the thread below;
thread367-131738

 

[TVP]

cnuk,

Most test labs only require ~ $100 to perform a tensile test. Are you saying that this is prohibitive?

 

[kenvlach]

cnuk,
You need to provide more specific information than just the alloy. The properties depend upon the thermal and mechanical history and resulting grain size. What is the ASTM B601 temper designation for your item?

ASM Handbook vol. 2, 9th Edn., p. 263 has UTS, YS & elongation values for C12200 tubing, 25 mm OD w. 1.65 mm wall, in 4 different tempers:
temper UTS YS* Elongation
OS050 220 MPa, 32 ksi 69 MPa, 10 ksi 45%
OS025 235 34 76 11 45%
H55 275 40 220 32 25%
H80 380 55 345 50 8%

*0.5% extension under load.

The stress-strain curves in my references seem to be all for bar, strip, plate, & wire forms. If the stress-strain curve is really "the million dollar question" for your somewhat uncharacterized pipe or tube, results should be obtained by testing, rather than guesswork.

 

[deanc]

Dig out the ASTM books and see B75,B251 along with B88. Make sure you look at all the references

Make sure you really want B88 tube. There are other problems that go along with this spec.

 

[cnuk]

metengr: Yes I asked before but the information did not answer my question. Thus I was trying to ask it again in a more specific fashion hoping to get some assistance.

TVP: $100. wow. I was quoted $1500 CDN for one tensile test. Seems like I'm getting gouged.

kenvlach/deanc: Good info. I will dig up the books and confirm the exact spec I am using.

Seems like an actual test would work best and if the price is really $100 it's the best approach.