216 



TABLE 196.— STEEL-WIRE ROPE— SPECIFICATION VALUES 



Cast steel wire to be of hard crucible steel with minimum tensile strength of 155 

 kg/mm 2 or 220,000 lb/in." and minimum elongation of 2 percent in 254 mm (10 in.). 



Plow steel wire to be of hard crucible steel with minimum tensile strength of 183 

 kg/mm 2 or 260,000 lb/in. 2 and minimum elongation of 2 percent in 254 mm (10 in.). 



Annealed steel wire to be of crucible cast steel, annealed, with minimum tensile strength 



of 77 kg/mm 2 or 110,000 lb/in. 2 and minimum elongation of 7 percent in 254 mm (10 in.). 



Type A: 6 strands with hemp core and 19 wires to a strand (=6 X 19), or 6 strands 



with hemp core and 18 wires to a strand with jute, cotton, or hemp center. 



Type B : 6 strands with hemp core, and 12 wires to a strand with hemp center. 



Type C : 6 strands with hemp core, and 14 wires to a strand with hemp or jute center. 



Type AA : 6 strands with hemp core, and 37 wires to a strand (= 6 X 37) or 6 strands 



with hemp core and 36 wires to a strand with jute, cotton, or hemp center. 



Diameter 



Approx. weight 



Minimum strength 



Description mm 



Galv. cast steel, Type A 9.5 



" " 12.7 



" " 25.4 



" " 38.1 



Galv. cast steel, Type A A 9.5 



' « " 12.7 



" 25.4 



" 38.1 



Galv. cast steel, Type B 9.5 



" " 12.7 



" " 25.4 



" "....' 38.1 



Galv. cast steel, Type C 25.4 



" " 41.3 



Galv. plow steel, Type A 9.5 



" " 12.7 



" " 25.4 



" " 36.5 



Galv. plow steel, Type AA 9.5 



" 12.7 



" 25.4 



" 41.3 



kg/m 



.31 



.55 



2.23 



5.06 



.35 



.58 



2.23 



5.28 



.25 



.42 



1.68 



3.94 



1.59 



4.35 



.31 



.55 



2.23 



4.66 



.33 



.58 



2.35 



6.18 



lb/ft 



.21 



.37 



1.50 



3.40 



.22 



.39 



1.50 



3.55 



.17 



.28 



1.13 



2.65 



1.07 



2.92 



.21 



.37 



1.50 



3.13 



.22 



.39 



1.58 



4.15 



kg 



3,965 



6,910 



27,650 



63,485 



3,840 



7.410 



27,650 



59,735 



2,995 



5,210 



20,890 



47,965 



18,825 



51,575 



4,690 



8,165 



32,675 



69,140 



4,540 



8,750 



32,250 



83,010 



lb 



8,740 



15,230 



60,960 



139,960 



8,460 



16,330 



60,960 



131,690 



6,600 



11,500 



46,060 



105,740 

 41,500 



113,700 

 10,340 

 18,000 

 72,040 



152,430 

 10,000 

 19,300 

 71,100 



183,000 



TABLE 197.— STEEL-WIRE ROPE— EXPERIMENTAL VALUES 



Wire rope purchased under Panama Canal Spec. 302 and tested by National Bureau 

 of Standards, Washington, D. C. 



Description and analysis Diameter 



mm in. 



Plow steel, 6 strands X 19 wires 



C .90, S .034, P .024, Mn 



.48, Si .172 50.8 2 



Plow steel, 6 strands X 25 wires 



C .77, S .036, P .027, Mn 



.46, Si .152 69.9 2\ 



Plow steel, 6 X 37 plus 6 X 19 



C .58, S .032, P .033, Mn 



.41, Si .160 82.6 3\ 



Monitor plow steel, 6 X 61 plus 



6 X 19, C .82, S .025, P .019, 



Mn .23, Si .169 82.6 3\ 



Ultimate strength 



kg 



II, 



137,900 304,000 



314,800 694,000 



392,800 866,000 



425,000 937,000 



Ultimate strength 

 (net area) 



A , 



kg/mm 2 lb/in. 2 



129.5 184,200 



151.2 214,900 



132.2 187,900 



142.5 202,400 



Recommended allowable load for wire rope running over sheave is one-fifth of specified minimum 

 strength. 



SMITHSONIAN PHYSICAL TABLES 



