Galvanized vs. annealed baling wire
Galvanized and annealed baling wire each have distinct properties, advantages, and disadvantages. To choose the right type of baling wire for your application, check your baler, the material you’re baling, and the bale storage conditions. Then, consult the following table on galvanized versus annealed baling wire.
Feature |
Galvanized wire |
Annealed wire |
Finish |
Class 1 or Class 3 zinc coating |
Black oxide coating with wax finish |
Corrosion resistance |
High |
Moderate |
Tensile strength |
High |
Moderate |
Ductility |
Moderate |
High |
Elongation |
Moderate |
High |
Common uses |
Outdoor applications, humid conditions, harsh environments |
Indoor applications, expansive materials |
About galvanized baling wire
Galvanized wire undergoes a hot-dip galvanizing process, which involves coating the steel wire in a protective layerof zinc. This zinc coating acts as a sacrificial layer, protecting the underlying steel from rust and corrosion. Galvanized wire is known for its:
- Corrosion resistance: galvanized iron wire resists rust up to 100 times better than uncoated steel, making it highly durable and long-lasting.
- Versatility: many industries, including recycling, agriculture, and construction, use galvanized wire due to its high tensile strength, formability, and corrosion resistance.
- Durability: the zinc coating is extremely durable and resistant to scratches from abrasion.
- Long shelf life: hot-dip galvanized steel has a long life, reducing maintenance costs and offering a low long-term cost.
Learn more about the pros and cons of galvanized wire.
Common Uses
The recycling industry uses galvanized wire for baling recyclable materials that require long-term outdoor storage or experience exposure to wet conditions, such as:
- Aluminum cans
- Copper
- Rubber tires
- Scrap metal
Vineyards and orchards also use high-tensile galvanized wire for trellising and tree support; farms use it for fencing and animal enclosures.
Our galvanization process
We use a meticulous hot-dip galvanization process to produce superior-quality wire. The process involves:
- Surface preparation: we clean the wire to remove impurities
- Pickling: we immerse the wire in an acidic solution to strip oxides and residue
- Fluxing: we soak the wire in a flux solution to prevent oxidation and form a uniform zinc coating
- Molten bath: we dip the wire into a bath of molten zinc at around 450°C (850°F)
- Alloy formation: iron-zinc alloys form for excellent adhesion and corrosion resistance
- Extraction: we slowly withdraw the wire from the zinc bath to produce an even coating
- Quenching: we rapidly cool the coated wire to solidify the zinc layer
Galvanization classes
Galvanized wire comes in different classes based on the thickness of the protective zinc coating. We offer both Class 1 and Class 3 galvanization:
- Class 1 galvanization offers a basic zinc coating of 0.28 ounces per square foot, providing 2–11 years of corrosion protection, depending on the environment
- Class 3 galvanization features a premium zinc coating nearly three times thicker than Class 1, using 0.80 ounces of zinc per square foot, resulting in 13–30 years of corrosion protection.
While both classes provide rust resistance, Class 3 galvanization is the best choice for harsh environmental conditions and heavy-duty applications.
About annealed baling wire
Our black annealed wire undergoes a treatment process, which involves heating and slowly cooling the wire to relieve internal stresses and increase ductility. The annealing process results in a black oxide coating on the wire's surface, providing annealed wire with moderate corrosion resistance. Annealed wire is known for its:
- Improved mechanical properties: annealing improves the structural integrity, flexibility, and elongation properties of wire, making it more workable and better suited for baling applications that require flexible, ductile wire.
- Increased wire efficiency: enhanced elongation properties can reduce the amount of wire operations use.
- Stress reduction: by relieving internal stresses built up during the drawing process, annealing reduces the risk of fatigue, fracturing, or cracking over prolonged periods of use.
- Enhanced electrical and magnetic properties: the heat treatment process improves conductivity and magnetism, making annealed wire a good choice for electric fencing.
Learn more about the pros and cons of black annealed wire.
Common uses of annealed wire
Recycling facilities use black annealed wire for baling expansive materials or materials that require short-term indoor storage, such as:
The increased ductility and elongation of annealed wire adapt it for baling expansive or awkward materials that require the wire to bend, twist, or conform to awkward shapes.
Our annealing process
Our black annealed wire undergoes a precise annealing process to enhance ductility and elongation. The process involves:
- Heating the wire to a specific temperature above the recrystallization temperature
- Maintaining the temperature for a designated time
- Slowly cooling the wire to relieve internal stresses and improve ductility
The annealing process gives black anneal wide an elongation of up to 25%, compared to the 12% elongation of galvanized baling wire.
Our galvanized and annealed baling wire products
Baling Wire Direct sells high-quality galvanized and annealed baling wire products manufactured from premium-grade US steel. Our wire undergoes a meticulous manufacturing processto provide superior performance and durability.
Galvanized baling wire products
We sell the following galvanized baling wire products:
- Galvanized wire: multi-purpose wire for baling and non-baling applications, sold by the stem
- High-tensile galvanized wire: manufactured from high-carbon steel for enhanced tensile strength and heavy-duty applications
- Single loop bale ties: for manual-tie horizontal and vertical balers, featuring a single loop for variable-size bales
- Double loop bale ties: for manual-tie horizontal and vertical balers, featuring a convenient double-loop hooking configuration for quick tying
Annealed baling wire products
We sell the following black annealed baling wire products:
- Black annealed stem wire: for high-volume automatic balers, sold in 1,900 lb stems
- Black annealed box wire: for lower-volume auto-tie balers, sold in 50 and 100-lb boxes
Single loop bale ties: for manual-tie vertical and horizontal balers, featuring a single loop for variable bale sizes
Baling wire products we offer
Baling Wire Direct sells the following high-quality baling wire products.