 diaphram analysis is in and ......, from RustyWA |
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| bd1308 |
 Feb 27 2006, 07:59 PM
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#21
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Sir Post-a-lot  Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501  |
ah...hell i'll test it
I've literally probably eaten any one person's fair share of lead from using solder and stuff....i'll light it on fire for ya'll.... Na+H2O=BOOM b |
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| alpha434 |
Feb 27 2006, 08:02 PM
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#22
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My member number is no coincidence. Group: Members Posts: 3,154 Joined: 16-December 05 From: Denver, CO Member No.: 5,280 Region Association: Rocky Mountains |
It's a stamped piece, right?
Be is ONLY added for machinability. If this wasn't a machined piece, then its, from a manufacturing perspective, 99% pure. Like you said. Same hardness. Most other mechanical features should be the same. Cu has a tendency to cold flow under extreme pressure. BeCu will crack. |
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| tdgray |
Feb 27 2006, 08:03 PM
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#23
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Thank God Nemo is not here to see this Group: Members Posts: 9,705 Joined: 5-August 03 From: Akron, OH Member No.: 984 Region Association: None |
What's 1080... And believe me I am sure we could afford you... just not the rubber room we'd have to house you in. Aaron what what the reading on your hootus... inquiring minds wanna know... And for all those following the story... you cannot tell chemical (elemental) analysis of steel by rockwell testing. My V.P. of QC (who owns a 914 and visits this board) can tell you that. |
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| tdgray |
Feb 27 2006, 08:05 PM
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#24
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Thank God Nemo is not here to see this Group: Members Posts: 9,705 Joined: 5-August 03 From: Akron, OH Member No.: 984 Region Association: None |
OMHFMOG.... Anyone want to field this one... Bueller... Bueller... That's it for me tonight folks. Feel free to keep it up (IMG:http://www.914world.com/bbs2/html/emoticons/popcorn[1].gif) |
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| alpha434 |
Feb 27 2006, 08:05 PM
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#25
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My member number is no coincidence. Group: Members Posts: 3,154 Joined: 16-December 05 From: Denver, CO Member No.: 5,280 Region Association: Rocky Mountains |
The acceptable environmental tolerence for Be is a pinch spread across a football field evenly. A shop I worked for had to use a piece for fitting another part too. Some guy dropped it, and everyone literally sprinted to the door. |
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| MattR |
Feb 27 2006, 08:06 PM
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#26
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Advanced Member Group: Members Posts: 3,279 Joined: 23-January 04 From: SF Bay Area Member No.: 1,589 Region Association: Northern California |
98% stud |
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| Aaron Cox |
Feb 27 2006, 08:06 PM
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#27
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
(IMG:http://gohanmi.com/cetr%20image/clip_image002.jpg)
yep |
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| tdgray |
Feb 27 2006, 08:09 PM
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#28
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Thank God Nemo is not here to see this Group: Members Posts: 9,705 Joined: 5-August 03 From: Akron, OH Member No.: 984 Region Association: None |
NIIIIIIICCCCCEEEEE.
(IMG:http://www.914world.com/bbs2/html/emoticons/huh.gif) I couldn't find the DAAAAAMMMMNNN banner. Thanks for portraying the lousy posting by me guys... thats real special (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) |
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| alpha434 |
Feb 27 2006, 08:10 PM
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#29
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My member number is no coincidence. Group: Members Posts: 3,154 Joined: 16-December 05 From: Denver, CO Member No.: 5,280 Region Association: Rocky Mountains |
So. Am I wrong because I'm wrong? Or am I wrong because I'm young. If you KNOW better than this, feel free to post whatever data you have. Because up until now, you haven't added much. A lotta blank space. If I think of a way to test it safely, I'll pm one of you guys. I'm off this thread. |
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| bd1308 |
Feb 27 2006, 08:13 PM
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#30
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
The EPA restricts the amount of beryllium that industries may release into the air to 0.01 µg/m³, averaged over a 30-day period.
The Occupational Safety and Health Administration (OSHA) sets a limit of 2 µg/m³ of workroom air for an 8-hour work shift. http://www.atsdr.cdc.gov/tfacts4.html b |
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| balljoint |
Feb 27 2006, 08:28 PM
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#31
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914 Wizard Group: Members Posts: 10,000 Joined: 6-April 04 Member No.: 1,897 Region Association: None |
"Early researchers tasted beryllium and its various compounds for sweetness in order to verify its presence. Modern diagnostic equipment no longer necessitates this highly risky procedure and no attempt should be made to ingest this substance. "
So no volunteers to taste test original equipment? |
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| Mueller |
Feb 27 2006, 08:30 PM
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#32
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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sounds like a bunch of sissies (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) I have props for my RC boats made of the stuff, I can make a necklace out of it if I wanted to...just don't grind the stuff without proper ventalation and you are fine......... |
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| MattR |
Feb 27 2006, 08:35 PM
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#33
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Advanced Member Group: Members Posts: 3,279 Joined: 23-January 04 From: SF Bay Area Member No.: 1,589 Region Association: Northern California |
what class do you run? |
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| Mueller |
Feb 27 2006, 08:37 PM
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#34
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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my boats are like my 914 (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) no particluar class, just built a few different ones....gas and electric for fun.... |
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| MattR |
Feb 27 2006, 08:41 PM
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#35
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Advanced Member Group: Members Posts: 3,279 Joined: 23-January 04 From: SF Bay Area Member No.: 1,589 Region Association: Northern California |
Cool. But Ive never seen an RC boat on jackstands (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) |
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| alpha434 |
Feb 27 2006, 08:43 PM
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#36
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My member number is no coincidence. Group: Members Posts: 3,154 Joined: 16-December 05 From: Denver, CO Member No.: 5,280 Region Association: Rocky Mountains |
If you chip it from dropping it, it'll throw up loose particles. But my machine shop teacher said that he used to machine it all the time. Said they just did it under an oil bath. Now they have some REALLY strict limitations on it.
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| lapuwali |
Feb 27 2006, 09:28 PM
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#37
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Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
No, it's also added to improve conductivity, and change the thermal expansion coefficient. Be has a very low coefficient of expansion, where Cu has a fairly high coefficient. Since I'd expect an pressure measuring device would not want to be substantially affected by changes in temperature, I'd say the latter quality would be good to get under control. Be MAY (I'm speculating here) also improve Cu's properties wrt work-hardening, since an MPS diaphram is also going to flex a great deal over many many cycles. The fact that they fail the way they do shows even BeCu isn't good enough, at least not for 30+ years of service... |
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| LvSteveH |
Feb 27 2006, 10:18 PM
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#38
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I put the Poor in Porsche Group: Members Posts: 1,080 Joined: 22-April 03 From: Las Vegas, Nevada Member No.: 600 |
Sometimes just plain wrong is good enough..... this is just such a case. You make way too many broad generalizations and unsupported assertions that are clearly derived from having heard or read something that is only vaguely relevant. Here's a tip, any time you consider saying "always" or "none" or "never" you are setting yourself up for failure. These are lessons that do in fact come largely with age, so in a round-about way, maybe it is because you are young, although you are not being discredited on that basis. Your age is simply the mechanism for your folly. Age and wisdom by no means go hand in hand, but they do occasionally intersect. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) Another good tip, don't ask questions you don't want to hear the answer to. (IMG:http://www.914world.com/bbs2/html/emoticons/beerchug.gif) |
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| Bleyseng |
Feb 27 2006, 11:03 PM
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#39
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Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
I want to hear how Aaron's hootus tests a diaphrams flexiblity...and what the maximum flex is especially with how short its travel is. (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif)
Damn, that copper diaphram tastes sweet! |
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| RustyWa |
Feb 28 2006, 02:06 PM
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#40
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Working Member Group: Members Posts: 610 Joined: 2-January 03 From: Kent, WA Member No.: 72 |
The analyzer I used, turns out, will not identify beryllium. That's my fault as I'm not a chemist nor a metallurgist. I just have access to this analyzer. It does do a real good job on nickel and cobalt and it did not list either of those in the scanning that I did yesterday and today. Then again, maybe the half-life of the source is getting old and is pretty weak.... BeCu chemical composition: http://www.olinbrass.com/becu_chemical.html |
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