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The patented steel was invented in England and it is called as "Improved Plow Steel" or "Extra Improved Plow Steel" in USA.

Applications

Redraw wire for music spring, MB spring, rope wire, and brush wire. Raw material for wire weaving, wire belting, flattened and formed products.

(Patented wire)

Production Process

Wire ropes are usually made from high carbon steel wires and before drawing the material is subject to a heat-treatment known as patenting. The large crystals would give rise to brittleness if the material was left in the heat-treated condition, but this effect is not noticed after a few drawing passes. Variation in hardness - either softer or harder-can be produced by tempering martensite, but such material does not draw so well as patented wire, which is able to withstand reductions of area up to 90%. The strength is explained on the basis of the reduced ferrite cells and the alignment of cementite in fibers.

Heat-treatment of High Carbon Steel Wire(Patenting)

Patenting consists of passing the wire through tubes in a furnace at about 970o C. This hightemperature treatment produces uniform austenite of rather large grain size. The subsequent cooling–in air or molten lead–is rapid since the sections treated are generally small (e.g. wire rods), sothat the resulting structure consists of very fine pearlite preferably with no separation of primaryferrite.

Hardenability, mass effect, ruling section

Hardenability is the measure of the depth to which a steel will harden on quenching.The maximum hardness is mainly a function of the carbon content. The hardenability of steeldepends on the quenching medium and method of quenching. the composition of the steel and method of manufacture and Section of the steel.

Features

Material: Medium and High carbon steel
Diameter: 1.60-3.00mm patented wire with continued heat treatment
Galvanizing: Electro galvanized coating for 30-120 grs/M2
Packing: Available in big coil about 800kg
Remark: Less than 2 welding splices