OpenBCM V1.07b12 (Linux)

Packet Radio Mailbox

DB0FHN

[JN59NK Nuernberg]

 Login: GUEST





  
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



Message sent with NPFPMS V2.54c


Read previous mail | Read next mail


 15.03.2025 17:30:28lGo back Go up