TABLE 200.— MECHANICAL PROPERTIES OF TUNGSTEN AND ZINC 225 



Metal or 

 alloy 



approx. 

 comp. 



percent 



Tungsten, 

 W99.2* 



Zinc,t 

 Zn: 



Condition 



Ingot sintered, 



D = 5.7 mm or .22 

 in 



Swaged rod, 



D = .7 mm or .03 

 in 



Drawn hard, 



D = .029 mm or 

 .00114 in 



Swaged and drawn 

 hot 97.5% reduc- 

 tion 



Same as above and 

 equiaxed at 2000° 

 C in H.t 



Cast 



Coarse crystalline. 



Fine crystalline . . . 



Rolled (with grain 

 or direction of 

 rolling) 



Rolled (acrossgrain 

 or direction of 



rolling) 



.Drawn hard 



Percent Hardness 



18.0 1124 



12.7 



- 151.0 



415.0 



164.0 



— 118.0 



18,000 0.0 0.0 — — 



215,000 4.0 28.0 — — 



590,000 — 65.0 — — 



233,500 3.2 14.0 — — 



168,000 0.0 0.0 — — 



7.0 437 (Impurities Pb, Fe, and Cd) 



2.8 to 

 8.4 



4,000 to 

 12,000 



— 42to 8to 



— 48 10 



2.0 19.0 2,900 27,000 — 



— — 4.1 

 7.1 443 - 



25.3 

 7.0 



5,800 



36,000 

 10,000 



* Commercial composition for some incandescent electric lamp filaments containing thoria (ThOo) approx. 0.75 

 percent. 



t Ordinary annealing treatment makes W brittle, and severe working, below recrystallization or equiaxing 

 temperature, produces ductility. W rods which have been worked and recrystallized are stronger than sintered 

 rods. The equiaxing temperature of worked tungsten, with a 5-min exposure, varies from 2200°C for a work 

 rod with 24 percent reduction, to 1350°C for a fine wire with 100 percent reduction. Tungsten wire, D = 0.635 

 mm or 0.025 in. 



t Compression on cylinder 25.4 mm (1 in.) by 65.1 mm (2.6 in.), at 20 percent deformation: 

 For spelter (cast zinc) free from Cd, av. 17.2 kg/mm 2 or 24,500 lb/in. 2 

 For spelter with Cd 0.26, av. 27.4 kg/mm* or 39,000 lb/in. - 

 Modulus of rupture averages twice the corresponding tensile strength. 

 Shearing strength: rolled, averages 13.6 kg/mm 2 or 194,000 lb/in. 2 

 Modulus of elasticity: cast, 7,750 kg/mm 2 or 11,025,000 lb/in. 2 

 Modulus of elasticity: rolled, 8450 kg/mm 2 or 12,000,000 lb/in. 2 



TABLE 201.— LOW-MELTING ALLOYS* 



Composition, percent 



Name Bi 



Anatomical alloy 53.5 



Wood's alloy 50 



Quaternary eutectic alloy.. 49.5 



Fusible alloy 38.4 



Eutectic alloy (Bi-Cd-Pb).. 51.6 



Alloy for fine castings 50 



Rose's alloy 50 



Bismuth solder 40 



Eutectic alloy(Bi-Sn) 57 



Eutectic alloy(Bi-Cd) .... 60 



Eutectic alloy(Bi-Pb-Sn) .. 13.7 



Eutectic alloy(Cd-Sn) .... — 



Eutectic alloy(Pb-Sn) .... — 



Cd 



Pb 



Sn 



Other 



Hg 10.5 



* See also Table 123. 



SMITHSONIAN PHYSICAL TABLES 



