The most common steel wire grades are: IPS (Improved Plow Steel), EIP (Extra Improved Plow Steel) and EEIP (Extra Extra Improved Plow Steel). Stainless Steels and other special grade are provided for special applications.Most wire ropes are made with round wires. Both triangular and shaped wires are also used for special constructions.Generally, the higher the strength of the wire, the lower its ductility will be.