28o 



Table 266 



LINEAR EXPANSION OF THE ELEMENTS 



C is the true expansion coefficient at given temperature; R indicates reference to notes 

 and authority, see page 282; M is the mean coefficient between given temperatures; where 

 one temperature is given the true coefficient at that temperature is indicated; a and /3 are 

 coefficients in formula l t = h (1 + at + fit 2 ); / is length at 0° centigrade (unless otherwise 

 indicated, when if x is standard temp., /< = l x (1 -f a {t - t x ) + 8(t — t x ) 2 );l t is length at t°C. 



Element 



Aluminum. . . 



Antimony. . . . 



Arsenic 



Bismuth 



Cadmium. . . . 



Carbon, 



diamond. . . 

 Carbon, 



graphite . . . 

 Chromium. . . 



Cobalt 



Copper 



Gold ..'.'.'.'.'.'. 



Indium 



Iodine 



Iridium 



Iron, soft. . . . 

 cast. . . . 

 wrought 

 steel . . . 



Lead (99.9) . . 



Magnesium . . . 

 Manganese. . . . 

 Molybdenum! 



Nickel 



Osmium 



Palladium . . . . 



Platinum 



Potassium . . . . 



Rhodium 



Ruthenium. . . 



Selenium 



Silicon 



Silver 



Sodium 



Steel, 36.4 Ni. 



Tantalumf. . . . 



Tellurium 



Thallium 



Tin 



Tungstenf. . . . 

 Zinc 



Temp. 



Temp, range a X io 4 



X io" 



100 

 280 



40 



4" 



0°, 500 



140 

 140 



500 

 121 

 625 



80 

 1720 



750 

 750 

 750 

 240 



+ 20, 



20, 300 



-142, 19 



19. +305 



— 190, + 20 

 f 20, +300 



500, 1000 



— 190, +100 



o, 1000 



— 190, —100 



o, -H 80 



0, 1000 



— 75. -112 



- 75. - 67 



o, 875 



20, 500 



o, 50 



260, 500 



340, 500 



20, 400 



— 105. +502 



o, 400 



.526 

 .214 



.086 



.121 

 .161 



.0636 

 .0679 



.1158 

 .1170 

 .1118 

 .269 



.248O 



.216 



.0515 



.0501 



.1308 

 .1236 

 .1346 



.1152 



.II67 

 .0875 

 .08OO 

 .0887 



.0746 



.0182 



.1827 



• 1939 



.72 



.144 



.136 



.0646 



.0428 

 • 354 



.OO64 

 .0040 



.0032 

 .0011 



■ 0053 

 .0053 

 • 0053 

 .011 



.0096 



.0121 

 .0057 

 .0014 



.0166 

 .0066 

 .0033 



.00517 



.0022 



.00314 



.00121 



.00132 



.00479 

 .00295 



.0263 



.00058 

 .010 



* For references, see page 282. 



t Molybdenum, <300° to 2500° It =/3oo[i +5.00 X io-« (( — 300) + 10.5 X io- 10 (t — 300)-] Worthing, 1926 

 Tantalum, 300° to 2800° It — /300U + 6.60 X io- 6 (t — 300) + 5.2 X io-'° (( — 300) 2 ] Worthing, 1926 

 Tungsten, 300° to 2700 log* = lm[i + 4.44 X io-« (( —300) + 4.5 X io 10 (t — 300) -} Worthing, 1926 



Smithsonian Tables 



