TABLES 142-146.— THERMAL EXPANSION 



145 



TABLE 142.— EXPANSION OF THE ELEMENTS* 

 Part 1. — Coefficients of linear t thermal expansion of chemical elements (Polycrystalline) 



+ 18 to 100 6.6 



Oto 1000 7.9 



Oto 1700 8.7 



Iron -182 to 9.1 



-100 to 10.4 



Oto 20 11.6 



20 to 100 12.1 



20 to 300 13.4 



20 to 600 14.7 



20 to 900 15.0 



Lead -190 to 20 



+ 20 to 100 

 20 to 200 

 20 to 300 



Lithium 



•178 



- 98 



- 3 



Oto 95 



26.7 

 29.2 

 30.0 

 31.3 



17.0 

 36.3 

 45.7 

 56. 



1,35 

 30,36 



2,5, 

 37,38, 

 39,40, 

 41,42 



43,44 



* Compiled by Peter Hidnert and H. S. Krider, of the National Bureau of Standards. 



t The coefficient of cubical expansion of an isotropic solid element may be taken as 3 times the coefficient of 

 linear expansion within a high degree of approximation (See Part 3 for determined coefficients of cubical ex- 

 pansion of some chemical elements.) 



** Numbers refer to authorities given at end of table. 



t The coefficients of expansion depend upon the orientation of the constituent crystals. 



§ The coefficients of expansion depend upon coarseness of grains and treatment of metal. 



{continued) 



SMITHSONIAN PHYSICAL TABLES 



