Temperature on the Hysteresis Loss in Iron. 131 



Table III. 



Temp. 15° C. 



Temp. 200° C. | Temp. 256° C. 





B. i W. 



H. 



638 



B. 



1176 



W. 



436 



H. 



B. 



W. 



7-97 



1152 293 



5-58 



1342 



500 



10-36 



3521 5008 



8-77 



3854 



5490 7-97 



4826 



6373 



11-96 



5524 10594 



10-36 



6137 



10939 10-36 



7868 



13495 



14-35 8602 21021 



15-15 



9651 



22391 15-15 



10018 20900 



1674 



10333 30033 











1 



Ten 



ip. 315° C. 



Temp. 364° C. 



Temp. 412° C. 



H. 



B. | 



W. 



H. 



B. 



W. j H. 



B. 



W. 



4-78 



1433 ; 



639 



3-98 



1375 



376 ! 3-19 



1408 



300 



6-77 4674 j 



5077 



5-58 



4431 



3998 ! 4-78 



4674 



3585 



8-77 | 7343 



10806 



6-78 



6661 



7485 6-38 



7291 



7233 



13-55 9965 



16991 



9-57 9021 



1 



12078 1 11-16 



9913 



12411 



Temp. 472° C. 



Temp. 543° C. Temp. 604° C. 



| H. 



B. 



W. 



H. 



B. 



W. H. 



B. 



1458 



W. 



92 



2-47 



1276 



181 



\ 1-99 1500 



178 j 1-196 



3-98 



4917 



2917 



j 2-79 



4992 



2179 1 1-99 



4219 



1029 



5-18 



7081 



5372 



i 3-59 



6556 



i 3464 i 3-19 



6923 



2795 



7-97 



9179 



8676 



717 



9126 



! 6830 ! 5-98 



1 



8235 



3761 



Temp. 648 D C. 



Temp. 670° C. 





H. B. 



W. 



! h. 



B. 



! w. 



1-036 1425 



69 



j 3-18 



1359 



103 





! 1-99 ! 4128 



866 



! 7-97 



1873 



i 129 





I 6-38 ! 5927 



i i 



1730 



1 

 j 





' 





the temperature is raised the rate of fall of hysteresis in- 

 creases , reaching a maximum at about 350° C. Then, as the 

 temperature is increased, the hysteresis decreases less rapidly. 

 The curve for B = 2000 shows that the rate of fall of 

 hysteresis continues to decrease even when a temperature of 

 670° 0. is reached, which is only about 10° C. below the 

 critical temperature. 



Hysteresis-induction curves for constant magnetic forces 

 corresponding to those given in fig. 10 (p. 133) for iron, can be 

 obtained from the results given in 



magnetic force the values of B at the 



Tabic III. For each 

 different temperatures 



K 2 



