Properties of the Alloys of Cast-iron and Aluminium. 613 



Data. 



H. 



394° C. 



388° C. 



370° C. 



354° C. 



330° C. 



234° C. 



B. 



B. 



E. 



B. 



B. 



B. 



8-20 



2690 



2912 



3151 



3221 



3195 



3053 



690 



2602 



2805 



3045 



3115 



3089 



2947 



5 - 25 



2460 



2646 



2886 



2956 



2929 



2788 



3-84 



2301 



2487 



27L'7 



2779 



2752 



2593 



2-60 



2142 



2257 



2515 



2602 



2558 



2416 



133 



1929 



2062 



2320 



2372 



2328 



2186 



•59 



1788 



1938 



2178 



2213 



2186 



2014 







1646 



1798 



1965 



2018 



2009 



1850 



- -59 



1434 



1620 



J805 



1859 



1832 



1708 



-1-33 



1062 



1230 



1381 



1451 



1443 



1389 



-2-60 



- 796 



- 805 



- 885 



- 796 



- 646 



- 443 



-3-84 



-1752 



-1920 



-2106 



-2071 



-2009 



—1584 



-525 



-2212 



-2416 



-2637 



-2655 



-2628 



-2345 



- 690 



-2496 



-2735 



-2974 



-3027 



-3000 



-2805 



-8-20 



-2690 



-2912 



-3151 



-3221 



-3195 



-3053 



I 



( 



151 



°C. 



151 



3 C. 



21 c 



C. 



21° 



C. 



H. 



B. 



H. 



B. 



H. 



B. 



H. 



B. 



8-20 



2982 



- -59 



1602 



8-20 



2951 



1 - -59 



1582 



6-90 



2876 ■ 



-1-33 



1301 



6-78 



2840 



-1-30 



1304 



5-25 



2717 



-260 



168 



5-13 



2674 



1 -2-54 



379 



384 



2540 



-3-84 



-1319 



3-78 



2489 



1 -3-78 



-1008 



2-60 



2363 



-5-25 



-2186 



2 54 



2286 



j —5-13 



-2026 



1-33 



2115 



-690 



-2700 



1-30 



2064 



-678 



-2636 



•59 



1956 



-8-20 



-2982 



•59 



1916 



-8-20 



-2951 







1832 



1 









1804 







The observations obtained from the experiments with rising 

 temperatures are indicated thus x , and those obtained from 

 the experiments with falling temperatures Q. 



It will be seen that the curves develop maxima at the tem- 

 peratures 570° and 530° C. respectively. 



If these curves be compared with the corresponding double 

 reversal curves fig. 3, it will be seen that the hysteresis loss 

 falls off as the induction increases, reaches a minimum value 

 at a temperature about 100° higher than the temperature of 

 maximum induction, and attains a second maximum when 

 the induction has about half its maximum value. 



