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G6KUI > TECH 29.05.06 01:34l 38 Lines 1094 Bytes #999 (0) @ WW
BID : 7459_G6KUI
Read: DL1LCA GUEST
Subj: Re: Resistivity of Chromium
Path: DB0FHN<DB0THA<DB0ERF<DB0FBB<DB0BI<DB0NOS<DB0EA<DB0RES<DK0WUE<GB7FCR<
GB7YFS<GB7MAX<GB7DBY<GB7DBY
Sent: 060529/0020z @:GB7DBY.#23.GBR.EU NPF2.54c [G6KUI PMS Alvaston Derby]
Andy GM7HUD wrote (amongst other things).....
}
} The end result makes a simple search for some data harder than it should be
} nowadays. If I still worked for a proper engineering company then I'd have
} wandered over and looked up the answer in the "Rubber" book (The CRC
} Handbook of Chemistry and Physics). But I don't, so I can't. However, most
} websites are giving figures around 12.4 to 13.2 for Chromium. Where a
} temperature is specified then it's 20C.
}
A quick look at the 85th edition of the "Rubber Book" ( we always called
it the "Rubber bible" ) gave the following :-
Temp (Kelvin) Cr Cu
100 1.6 .348
150 4.5 .699
200 7.7 1.046
273 11.8 1.543
293 12.5 1.678
298 12.6 1.712
300 12.7 1.725
400 15.8 2.402
500 20.1 3.090
600 24.7 3.792
700 29.5 4.514
800 34.6 5.262
900 39.9 6.041
Good stuff this internet , if you know where to look ;-))
73, Pete G6KUI
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