This classification of wire rope has a third layer of wires which make them more flexible although less abrasion-resistant than ropes of the 6 x 19 class.
Comparatively small diameter wires which offer superior bending ability.
As the number of wires in each strand increases, flexibility increases.
This classification covers ropes with 6 strands having 27 to 49 wires per strand.
Excellent flexibility wire rope with good fatigue resistance
Reasonable resistance to crushing, but not as crush resistant as 6 x 19 class
Well adapted to high speed multiple reeving applications
Very versatile general purpose wire rope
Fiber core (FC) construction is much more elastic under load (stretch), which offers greater energy absorption capability, however it is much less crush resistant than steel core (IWRC).
Standards RR-W-410G
Applications include, overhead crane and mobile crane hoist ropes, winch lines, large diameter towing lines, main and auxiliary hoist lines on steel mill cranes and also well suited for larger diameter wire rope sling fabrication.