151 



TABLE 143.— COEFFICIENTS OF LIN 

 SOME ALLOYS 



Alloy 

 Platinum-iridium, 20 Ir. 



Platinum-rhodium, 20 Rh 



SAE carbon steels II 



S AE stainless chromium irons 



Speculum metal 



Stainless steel, 12 Cr 



18 Cr, 8 Ni 



Stellite, 55 to 80 Co, 20 to 40 Cr, to 10 W, 

 to 2 C 



Tantalum carbide 



Tungsten carbide +5.9 Co 



+ 13.0 Co 



Zinc-aluminum, 22.6 Al 



50 Al 



|| Coefficients of expansion of other SAE steels (free-cutting, manganese, nickel, nickel-chromium, molyb- 

 denum, chromium, chromium-vanadium and chromium-nickel austenitic steels) are given in Metals Hand- 

 book of the American Society for Metals. 



Authorities 



1. Hidnert and Sweeney, 1927; 2. Kempf, 1933; 3. Hidnert, 1925; 4. Schulze, 1921; 

 5. Hidnert, 1921; 6. Bolton, 1936; 7. Masumoto, 1934; 8. Hidnert, 1936; 9. Aoyama and 

 Ito, 1938; 10. Hull and Burger, 1934; 11. Hull, Burger, and Navias, 1941; 12. Various; 

 13. Schulze, 1928; 14. Masumoto, 1931; 15. Souder and Hidnert, 1922; 16. Hidnert, 1931 ; 

 17. Scott, 1930; 18. Hidnert, 1938; 19. Hidnert and Sweeney, 1928; 20. Takahasi and 

 Kikuti, 1936; 21. Grube and Vosskuhler, 1934; 22. Grube and Burkhardt, 1929; 23. 

 Schulze, 1933 ; 24. Ebert, 1935 ; 25. Dean, 1930 ; 26. Cook, 1936 ; 27. Physikalische-Tech- 

 nische Reichanstalt, 1920; 28. Day and Sosman, 1910; 29. Scheel, 1921; 30. Hidnert, 1928; 

 31. Souder and Hidnert, 1921 ; 32. Becker and Ewest, 1930; 33. Hidnert, 1937; 34. Hidnert, 

 1924. 



SMITHSONIAN PHYSICAL TABLES 



