XSTEELIA™ Catalyst for Steel Innovation
Small Diameter Wire Rods

Our "small diameter wire rods" are rod products with a diameter of 5.0mm or less, and their high-volume production was made possible by our proprietary technologies.

By using these products, drastic reductions in many secondary processes can be realized, and the resulting benefits for customers will be fully recognized particularly in manufacturing fine-drawn wire. These products, applicable to wide-ranging steel types including wire rods for steel cord, are supplied from Kamaishi Works and Kimitsu Works to customers in Japan and all around the world.
At Kamaishi Works, which has various types of product test equipment such as wire drawing machines and heat treaters, customer support services are provided to satisfy the needs of individual users such as pre-shipment material evaluation.

Available diameters

Wire diameter classification General wire rods Small diameter wire rods
Diameter (mm) 5.5 5.0 4.5 4.0 3.8 3.6
Available diameters Muroran Works Circle
Yawata Works Circle
Kimitsu Works Circle Circle
Kamaishi Works Circle Circle Circle Circle Circle Circle

Available diameters *Contact us before ordering 3.6mm-diameter products.*Heavy weight coils are not available at present.

Examples of steel types / applications

Steel types Applications
Wire rods for saw wire Saw wire
Wire rods for steel cord Steel cord for tires
Wire rods for piano wire Control cable and the like
Wire rods for hard steel wire Bead wire and the like
Wire rods for welding materials Welding electrodes

Saw wire Cross-section of steel radial tire Steel cord Bead wire

Examples of eliminated secondary processes (benefits for customers)

Examples in steel cord and saw wire applications

Examples in steel cord and saw wire applications

Example: STC 70C / Example: STC 80C / Example: Saw wire 90C

Benefits for customers

Low cost

Possible elimination of patenting and wire drawing processes

Evaluation data (detailed descriptions about the "reasons behind the benefits")

Improved cooling effect due to smaller wire rod diameters

  • Improved cooling effect during wire rod rolling → homogeneous microstructure, → grain refinement
  • Improved cooling effect during wire drawing → aging control, cementite separation control

Improved cooling effect due to smaller wire rod diameters

Microstructure cross-sections (examples of 82C)

Microstructure cross-sections (examples of 82C)

Example: Critical wire drawing vs. carbon content

Improved wire drawability due to enhanced cooling effect

Example: Critical wire drawing vs. carbon content

  • Judgment criteria for critical wire drawing: (1) drawing rate ≥35%, (2) twisting value ≥25% (l=100d), (3) unwinding test ≥90% success rate (after 8 automatic windings)