Steel wire for pre-stressed concrete sleepers

Requirement to supply 500 ton of steel wire for pre-stressed concrete sleepers
1. single wire, stress relieved.
2. nominal diameter : 3 mm.
3. wire cross sectional area : 0. 07 cm².
4. tensile strength : 19000 kg/ cm².
5. for delivery:
a. the steel wire has to be arranged in coils of inner diameter {65 – 70} cm (each).
b. the coil have weight of {160 – 180} kg and able to be loaded and unloaded easily.
6. the steel wire coil has to be very well protected against dampness to avoid cor