456 



TABLE 472.— SPECIAL TRANSFORMER SHEET 



Low induction values 



Values of H 

 Values of B 

 Values of fi 



Values of H 

 Values of B 

 Values of n 



Values of H 

 Values of B 

 Values of n 



Values of H 

 Values of B 

 Values of fi 



Values of H 

 Values of B 

 Values of m 



Values of H 

 Values of B 

 Values of /jl 



Special Hi silicon steel, (4£% Si), .014" sheet 

 H 2 annealed 875°C 



001 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.018 0.020 

 3.0 5.0 7.0 10.0 13.0 16.0 21.0 24.0 

 750 833 875 1000 1083 1143 1167 1200 



Nickel-iron alloy 48% Ni, 52% Fe, .014" sheet 



Allegheny electrical alloy 4750 



Treatment 1100°C 6 hr p.d. H 2 cooled to room temp. 5 hr 

 0.001 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.018 0.020 

 7.0 15.0 32.0 49.0 67.0 88.0 108.0 132.0 185.0 215.0 

 7000 7500 8000 8165 8375 8800 9000 9430 10280 10750 



Permalloy strip, 79% Ni, 21% Fe 

 Treatment H, 1100°C 4 hr f. c. 625°C in air 



001 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.018 0.020 

 15.0 30.0 67.0 115.0 180.0 260.0 365.0 458.0 683.0 805.0 

 15000 15000 16750 19160 22500 26000 30420 32710 37940 40250 



Monimax 47% Ni, 3%Mo bal Fe, strip .004" 

 Treatment annealed 2 hr 1150°C p.d. H 2 

 0.001 0.002 0.004 0.006 0.008 0.010 



— — — — — 21 



— — - — — 2100 



Mumetal strip .014", 77.2 Ni, 4.8 Cu, 1.5 Cr, 14.9 Fe 

 Treatment annealed in p.d. H 2 at 1100°C 4 hr f. c. 



0.001 0.002 0.004 0.006 0.008 0.010 0.012 0.014 0.018 0.020 

 20.0 50.0 158.0 300.0 443.0 600.0 758.0 923.0 1253.0 1420.0 

 20000 25000 39500 50000 55375 60000 63160 65930 69610 71000 



Cold rolled 3% Si, strip (oriented) .014" 



Annealed in H 2 980° C 



0.001 0.002 0.004 0.006 0.008 0.010 



— 7 15 24 33 42 



— 3500 3750 4000 4100 4200 



TABLE 473.— MAXIMUM CORE LOSSES IN ELECTRICAL STEEL SHEETS 



Designation 



Thickness, in.: .0140 



Armature AISI M-43 1.30 



Electrical AISI M-36 1.17 



Motor AISI M-27 1.01 



Dynamo AISI M-22 82 



Transformer 72 AISI M-19. . .72 



Transformer 65AISIM-17.. .65 



Transformer 58AISIM-15.. .58 



Transformer 52AISIM-14.. .52 

 Transformer 100 AISI M-10. . 

 Transformer 90 AISI M-9. . . 



Armature AISI M-43 4.30 



Electrical AISI M-36 3.60 



Motor AISI M-27 2.65 



Dynamo AISI M-22 1.85 



Transformer 72 AISI M-19.. 1.65 



Transformer 65AISIM-17.. 1.50 



Transformer 58AISIM-15.. 1.40 



Transformer 52AISIM-14.. 1.00 



Transformer 100 AISI M-10. . .90 



Transformer 90 AISI M-9... .80 



SMITHSONIAN PHYSICAL TABLES 



