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The Cold Drawing Process for Steel Bars and Wire

• Raw Stock: Hot rolled steel bar or rod coils are used as raw material. Because the hot rolled products are produced at elevated temperatures (1700 - 2200 Deg. F. i.e. hot rolling), they generally have a rough and scaled surface and may also exhibit variations in section and size.

• Cleaning: Abrasive scale (iron oxide) on the surface of the hot rolled rough stock is removed.

• Coating: The surface of the bar or coil is coated with a drawing lubricant to aid cold drawing.

• Pointing: Several inches of the lead ends of the bar or coil are reduced in size by swaging or extruding so that it can pass freely through the drawing die. Note: This is done because the die opening is always smaller than the original bar or coil section size.

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  Drawing: In this process, the material being drawn is at room temperature (i.e. Cold-Drawn). The pointed/reduced end of the bar or coil, which is smaller than the die opening, is passed through the die where it enters a gripping device of the drawing machine. The drawing machine pulls or draws the remaining unreduced section of the bar or coil through the die. The die reduces the cross section of the original bar or coil, shapes the profile of the product and increases the length of the original product.

• Finished Product: The drawn product, which is referred to as Cold Drawn or Cold Finished, exhibits a bright and/or polished finish, increased mechanical properties, improved machining characteristics and precise and uniform dimensional tolerances.

• Multi-Pass Drawing: The cold drawing of complex shapes/profiles may require that each bar/coil be drawn several times in order to produce the desired shape and tolerances. This process is called multi-pass drawing and involves drawing through smaller and smaller die openings. Material is generally annealed between each drawing pass to remove cold work and to increase ductility.

• Annealing: This is a thermal treatment generally used to soften the material being drawn, to modify the microstructure, the mechanical properties and the machining characteristics of the steel and/or to remove internal stresses in the product. Depending on the desired characteristics of the finished product, annealing may be used before, during (between passes) or after the cold drawing operation, depending on material requirements. Click here to view annealing chart.

Click here to view benefits of cold drawing.

Cold Drawn Wire

Over 40 years ago, Fayette Wire began as a steel wire drawing facility utilizing hot rolled rod to produce a wide range of various size sections including rounds, flats, hexagons, squares, and other special shapes in both coil and straight lengths for consumer and industrial applications. Today, Fayette manufactures various grades of nonferrous and ferrous grades of alloy, low carbon and high carbon wire in rounds and special shapes. Our versatile wire can be used in a variety of end use products including POP displays, tie wire, cages… just to name a few.

Looking for less than mill quantities? Just call Fayette Wire and speak to one of our friendly associates. Included  in our extensive rod inventory are grades for bright basic, industrial quality, cold finished, cold heading, extruding, black annealed, galvanized, stainless steel wire, aluminum wire and copper wire.

All of our products are manufactured in the United States of America and therefore, conform to the Buy American Act and the Buy America restrictions of the Federal Transit Administration and the Federal Highway Administration. Please feel free to contact our office for additional details.

These are the benefits of Cold Drawn Steel Wire

Contact us to discuss your requirements of steel coil manufacturing process. Our experienced sales team can help you identify the options that best suit your needs.

• More accurate dimensional size tolerances.
• Increased Mechanical Properties, higher yield strengths, tensile strength and hardness.
• Improved Surface Finish, reduces surface machining and improves quality.
• Allows for higher machining feed rates.
• Superior Formability, responds better to spheroidization
• Maximizes machinability, thereby reducing yield loss.