Some baling wire undergoes a heat treatment process called annealing. Primarily chosen for its increased ductility, annealed wire offers advantages and disadvantages, depending on the application. The following table provides the pros and cons of black annealed baling wire.
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Pros
Cons
Increased elongation
Poor corrosion resistance in outdoor applications
Increased ductility (workability)
Annealing can reduce tensile strength
Smooth finish
Slightly higher cost than untreated wire
Annealed wire possesses increased elongation properties. The annealing process relieves internal stresses within the wire, allowing it to stretch more easily without breaking. This flexible wire effectively bales expansive or awkward materials, such as rubber tires or foam, that require the wire to bend, twist, or conform to specific shapes. While regular baling wire has an elongation value of 12%, black annealed wire can stretch up to 25% of its length before it is compromised.
Annealed wire exhibits remarkable ductility (workability) due to annealing. Increased ductility allows the wire to undergo extensive deformation without cracking or breaking, enabling it to be bent, shaped, and formed into intricate designs or configurations.
Enhanced workability makes annealed wire a preferred choice for applications that involve wire forming, bending, or shaping, such as tying bale ties (tie wire), securing construction materials, and other demanding tasks.
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The annealing process reduces the brittleness of wire, resulting in a material less prone to fracture or breakage under stress. Annealed wire is also smooth and often coated in wax. These features make annealed wire a popular choice for use in high-volume auto-tie balers because the wire feeds smoothly and rarely breaks.
This smooth finish also enhances the aesthetic appeal of the wire and facilitates easier handling and processing.
While annealed wire does not possess the same level of corrosion resistanceas galvanized wire, it does offer moderate protection against corrosion compared to uncoated baling wire. The annealing process creates a thin oxide layer on the surface of the wire, acting as a barrier against corrosive elements. The wax finishing coat applied to annealed wire also defends against corrosion.
Moderate corrosion resistance makes annealed wire a popular choice for baling recyclables that require short-term storage, such as plastics, office paper, cardboard, and tissue.
Black annealed wire is unsuitable for use in outdoor environments. Annealed wire will rust if exposed to harsh weather conditions, moisture, and other corrosive elements. As a result, annealed wire is recommended for indoor applications or environments with mild conditions.
While the annealing process improves ductility and elongation, it can also reduce tensile strength. Annealing alters the microstructure of the metal, reducing its hardness and strength. While annealed wire can elongate to cope with expansive materials, high-tensile wire is better for baling exceptionally heavy materials.
Annealed wire lacks the necessary rigidity for certain applications due to its increased flexibility and ductility. This lack of rigidity can be problematic in applications where stability or precise positioning is needed. In baling, materials might shift causing the bale to deform. In such cases, a type of wire with higher stiffness or rigidity, such as high-tensile wire, is more appropriate.
The annealing process itself can be time-consuming and add to the cost of wire production. It involves heating the wire to a specific temperature, holding it at that temperature for a time, and then cooling it slowly.
The annealing process requires precise temperature control, specialized equipment, and additional energy consumption, increasing production time and costs compared to non-annealed wire.
We offer high-quality annealed products. Our annealed wires and bale ties are manufactured from 100% US steel and undergo a meticulous manufacturing process to relieve internal stresses and improve ductility. We offer the following annealed wire products:
Balers may be fed by a gravity feeder, a mechanical conveyor, or an air feed system. If the operation calls for the use of the same baler to bale more than one material type, the baler must be specifically designed to handle different materials at different ranges of capacity. Tying bales with wire can be manual or automatic. The number, size, and tension of the baling wires must be adequate for the particular material baled. Throughput capacity for a typical baler is 20 tons per day. A baler produces no new waste streams.
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