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- Path: sparky!uunet!wupost!cs.utexas.edu!usc!news!proton!charity.llumc.edu!radoias
- From: radoias@charity.llumc.edu (costin radoias)
- Newsgroups: sci.materials
- Subject: Which copper alloy?
- Message-ID: <1992Sep1.003910.3180@proton.llumc.edu>
- Date: 1 Sep 92 00:39:10 GMT
- Sender: root@proton.llumc.edu (Operator)
- Organization: LLUMC Radiation Research Lab
- Lines: 40
-
- Sorry if I posted this twice, but I think it didn't go through the first time.
-
- Does anyone know how COPPER ALLOYS INTERACT WITH DEIONIZED WATER?
- I will be purchasing copper tubing to be used as a water cooled electrical
- conductor. The cooling water is deionized, and about 5 Mohms/cm.
- I can get the tubing in several alloys:
- Alloy 101: Copper 99.99%, -------------------> Conductivity = 101% IACS.
- Alloy 102: Copper 99.95%, -------------------> Conductivity = 101% IACS.
- Alloy 103: Copper 99.95%, Phosphorus 0.005%,-> Conductivity = 101% IACS.
- Alloy 110: Copper 99.90%, Oxygen 0.05%, -----> Conductivity = 101% IACS.
- Alloy 120: Copper 99.90%, Phosphorus 0.02%, -> Conductivity = 85% IACS.
-
- The electrical current is very large (4000 Amps), therefore, I prefer the
- alloys with highest conductivity (101, 102, 103, 110).
-
- So far I've only used alloy 110, but now I can't find a manufacturer that will
- make tubing out of alloy 110.
-
- Question #1. Will the other alloys (101, 102, 103) interact with our De-ionized
- cooling water? Specifically, would the phosphorus come out in solution and
- plague us with problems? (the cooling water resistivity must be above 5
- Mohms/cm at all times)
- Where can I look up this kind of information?
-
- Question #2. How does alloy 110 differ from alloy 102 in terms of electrical
- characteristics, and what does the Oxygen do for its properties?
-
- Question #3. What is IACS? I understand that 100% material is the most
- conductive possible. So how come the manufacturers specify my alloys are 101%
- IACS?
-
- Related Question: When someone advertises Oxygen-free speaker cable, they
- imply that it is somhow better. Is it? How? or is it just another advertising
- gimmick?
-
- Thanks in advance for your help.
- ------------------------------------------------------------
- Costin Radoias, EE, Proton Beam Therapy Facility
- Loma Linda University Medical Center, Loma Linda, CA
- internet:radoias@proton.llumc.edu
-