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Galvanized vs. Black Annealed: What’s The Difference?

Aug. 14, 2021

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Galvanized vs. Black Annealed: What’s The Difference?

In the world of bale ties, there are three commonly used wires in the manufacturing process. Iron wire with one of these three finishes will eventually be used to make bale tie. Each type has unique characteristics and attributes, giving the bale tie an independent look and feel.


1. Galvanized wire

The most common surface treatment of wire finish used in the production of a bale tie is galvanized. Galvanizing is the process of coating or bathing a raw steel or “bright basic” wire in a pool of molten zinc. This usually occurs close to the drawing process or directly after drawing to the desired thickness or specification.


Galvanized wire

Galvanized wire


How to make galvanized wire?

The galvanizing process allows the bale tie to be used in humid conditions without compromising its structural integrity. In short, galvanized bale ties can be used, and it should also be used when storing your baled material in a place that has exposure to the elements.

Galvanized bale ties will appear to be silver or metallic, with little oil or residue, and is easy to clean and use. Galvanized wire tends to be harder and lower elongation than black annealed bale tire. Galvanized wire is the most durable and versatile of the three finishes, especially when storing bales in an outdoor area.


2. Black annealed wire

When it comes to bale ties, the second most common type of wire finishing is black annealed. The annealing process uses a simple post-drawn "bright basic" steel wire, which is heated in an oven or kiln to change its chemical composition. This process can soften the wire, or change the color of the wire from rough gray or silver to black or brown.


Black annealed wire

Black annealed wire


The black annealed wire is also more reliable and not easy to break, so you will not encounter accidents during the tying process. It is specially manufactured to withstand pressure and environmental conditions, making it ideal for the construction, agriculture and recycling industries.

What is black annealing?

The black annealed bale tie will appear black or dark in color and feel slightly oily. Using black annealed bale tie, you will also find that the steel wire has an elongation of 5-10%, making it a more ideal for baling material, after releasing the RAM pressure on the baler.

Unlike galvanized bale tie, black annealed bale tie will rust, and if used and stored outdoors, it will often lead to wire failure.


3. Painted or coated wire

The last type of wire used to make bale ties is the coated or painted wire. Painted wire is usually a bright basic wire coated with a colored coating or "paint" that has dried giving the wire a rough textured feel.


Coated wire

Coated wire


What is a coated wire?

The painted wire bale tie will perform similar to a galvanized bale tie and is designed to be acceptable for bales stored outdoors. Although it is often cleaned during handling and tying sometimes issues will occur during the manufacturing process or during transportation or use causing the paint to chip and the wire underneath to become exposed, this exposed wires often fail when exposed to elements.


What is the bailing wire made of?

Each of the finishes above has unique characteristics and benefits. Depending on your particular system, the materials you are dealing with, and your budget, one of these three finishes is correct for bale tie. Also, make sure you take into consideration where the bales are stored once they are made this might limit your options. Contact us to get more information about our products.

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