The welding process involves various components, including the filler wire. It is an essential part of the welding process as it helps to join two metals together. However, not all filler wires are the same, and two types are commonly used – filler wire and stainless steel filler wire. If you’re new to welding or want to learn more about welding techniques and processes, understanding the difference between these filler wires is important. In this blog post, we’ll discuss the key differences between filler wire and stainless steel filler wire.
What are Filler Wire Vs Stainless Steel Filler Wire?
Filler wire and stainless steel filler wire are used for welding purposes, but they possess different characteristics that make them appropriate for different tasks. Filler wires are made of non-stainless steel alloys such as carbon steel, low alloy steels, and cast iron. They have a high deposition rate and excellent joint strength due to their lower melting point than stainless steel. On the other hand, stainless steel filler wires consist of austenitic or ferritic materials, which allow them to be welded with a low risk of corrosion or cracking. These components also have superior tensile strength and thermal shock resistance than those used in non-stainless fillers. As a result, they are commonly chosen when welding materials that will be exposed to harsh environments, such as outdoors or near water sources.
Difference Between Filler Wire Vs Stainless Steel Filler Wire
Material Composition
Filler wire is made of various materials and is available in different grades. Carbon steel, stainless steel, aluminium, and other alloys are all used to make filler wire. On the other hand, stainless steel filler wire is made of metal alloys with at least 10.5 per cent chromium. This specific ratio of chromium in the metal alloys creates stainless steel’s unique properties, including corrosion resistance.
Welding Application
The welding application you are working on will determine the type of filler wire you need. Standard filler wire is commonly used in general-purpose welding applications, whereas stainless steel filler wire is more commonly used for welding austenitic stainless steel. When welding stainless steel, using the correct filler wire is crucial to ensure the finished product has the desired corrosion resistance and strength.
Cost
In terms of cost, there is a noticeable difference between filler wire and stainless steel filler wire. Filler wire is generally less expensive, whereas stainless steel filler wire is more expensive due to the added alloying components required to obtain stainless steel’s unique properties. When the welding application calls for stainless steel’s corrosion-resistant properties, the additional stainless steel filler wire cost is worth investing in.
Weld Appearance
The appearance of the weld bead is another area where stainless steel filler wire outperforms standard filler wire. In general, stainless steel filler wire provides a more aesthetically pleasing weld with smoother, cleaner finishes. The finish is also more uniform, making it ideal for welding projects where appearance is essential.
Resistance to Corrosion
One of the most significant differences between filler wire and stainless steel filler wire is their corrosion resistance. Stainless steel filler wire has unique properties that make it highly corrosion-resistant. It can withstand exposure to harsh environmental conditions and is less likely to rust over time. On the other hand, standard filler wire does not possess these same properties, making it more susceptible to rusting over time.
Conclusion
Filler and stainless steel filler wires might look the same, but they have significant differences. Before selecting the type of filler wire you’ll need for a welding project, you must consider the material composition, welding application, cost, weld appearance, and corrosion resistance. When in doubt, it’s always best to consult a welding expert to ensure you have the right filler wire. With the right knowledge and expertise, you can always achieve excellent welding results.
