442 C. Boras and V. Strouhal — Strain-effect of sudden 



Table L- 



-Electrical resistance, density and specific volume of steel, 

 when varying with temper. 



No. 



Length. 



Diameter. 



Temper. 



So- 



A„. 



Vo. 





cm. 



cm 



Microhm 







I 



5-3 



1-9 



Commercial, soft 



(15) 



7-8372 



0-12760 









Glasshard 



(44) 



7-8092 



0-12805 









Annealed. 100°. l h 



(39) 



7-8088 



0-12806 









" 100°. 4 h 



(37) 



7-8094 



0-12805 









" 100°; 8 h 



(36) 



7-8108 



0-12803 









" 100°. 12 h 



(36) 



7-8114 



0-12802 









" 200°, 30 m 



(28) 



7-8096 



0-12805 









" 330°. 5 m 



(21) 



78236 



0-12782 









" 620°, 5 m 



(18) 



7-8342 



0-12765 









; ' 805°, 30 m 



(17) 



7 8361 



012762 









" (1300°) 



(19) 



7-8465 



0-12744 



II 



10-11 



0-576 



Commercial, soft 



(15) 



7-7033 



0-12981 









Glasshard 



(44) 



7-6200 



0-13123 









AnDealed, 190°, 4 m 



(32) 



7-6542 



0-13065 









330° 2 m 



(21) 



7-6661 



0-13044 









645°' 



(18) 



7-7008 



0-12986 









830° 



(18) 



7-7170 



012958 









" (1300°) 



(19) 



7-7392 



0-12922 



55 to 60 



21 pieces, 



0-127 



Commercial, soft 



15-25 



7-7337 



0-12931 



61 to 63 



each about 



0-127 



Glasshard 



43-29 



7-6688 



013040 





24 cm long. 





Annealed, 100°, 9 h 



35-61 



7-6976 



0-12991 









'• 200°, 2 m 



33-11 



7-6981 



0-12990 









200°, 30 m 



28-76 



7-7030 



0-12982 









" 330°, 30 m 



20-61 



7-7215 



0-12951 









810°, 30 ra 



18-10 



7-7872 



0-12842 









" (1000°) 



19-74 



7-7865 



0-12843 









" (1300°) 



19-29 



7-8007 



0-12819 







18 pieces, 



0-226 



Commercial, soft 



(15) 



7-81 



0-1280 





each about 





Glasshard 



(44) 



7-6817 



0-13018 





2+ cm long. 





Annealed. 100°. 10 m 



(42) 



7-6943 



0-12997 









" ' 100% 7 h 



(37) 



7-7102 



0-12970 









190°, 15 m 



(31) 



7-7251 



0-12945 









!1 330°, 8 m 



(21) 



7-7441 



12913 









460°. l h 



18-27 



7-7641 



0-12880 









720° 



17-13 



7-7793 



0-12854 









(900°) 



18-10 



7-7840 



0-12846 









" (1100°) 



18-60 



7-7865 



012843 









(1300°) 



18-30 



7-7856 



0-12801 



30 to 36 



72 pieces 



0-081 



Commercial, soft 



16-27 



7-7268 



0-12042 





about 



0-081 



Glasshard 



43-86 



7-6547 



0-13064 





2-J- cm each. 





Annealed, 100°, l h 



39-26 



7-6666 



0-13044 









" 100°^ 13 h 



35-51 



7-6745 



0-13030 









190°. 4 b 



30-82 



7-6841 



0-13014 









190°', 4 t 30 m 



2710 



7-6808 



0-13020 





71 pieces* 





" 190°. 4 k 30 m 



27-10 



7-6848 



0-13030 









" 330°, 10 m 



20-68 



7-6806 



0-13020 









470° 



18-36 



7-7190 



012955 









530° 



18-17 



7-7227 



0-12949 









" 690° 



17-24 



7-7272 



0-12941 









810° 



17-56 



7-7586 



0-12889 









" 1000° 



18-59 



7-7705 



0-12869 









•' fU00° 















* One piece lost. 



+ Fusion of copper envelope (capsule) destroys the wire. 



