Learn the Basics of Welding: 7018 Welding Rod Amperage

Welding is a vital skill used in various industries, from construction to automotive repair. As a beginner welder or an experienced fabricator, understanding the nuances of different welding rods is crucial for achieving quality welds. One of the most popular welding rods is the 7018 welding rod, known for its versatility and strength. In this post, we'll delve into the fundamentals of welding with 7018 welding rods, specifically focusing on the importance of amperage settings and how they can affect your welding projects.

What is a 7018 Welding Rod? 

The 7018 welding rod is a low-hydrogen, iron powder electrode known for its excellent mechanical properties. It is particularly favored for its ability to produce strong, crack-resistant welds, making it ideal for structural steel applications. The numbers in the 7018 designation signify specific characteristics: '70' indicates the minimum tensile strength of 70,000 PSI, '1' denotes that it's suitable for all-position welding, and '8' refers to the type of coating on the rod.

Understanding Amperage for 7018 Welding Rods

When welding with 7018 welding rods, selecting the proper amperage is crucial for effective arc stability and weld quality. Each diameter of the welding rod has a specific recommended amperage range that you should consider during your projects.

For example, the general guidance for amperage settings based on rod diameter is as follows:

- 1/8-inch (3.2mm): 110-150 Amps
- 3/32-inch (2.4mm): 70-90 Amps
- 5/32-inch (4.0mm): 150-190 Amps

Adjusting the amperage within these ranges will allow you to optimize penetration and bead shape according to the thickness and type of material you are welding.

Key Considerations for Setting Amperage

 1. Material Thickness: Thicker materials require higher amperage to ensure proper penetration. Conversely, thinner materials may need lower amperage settings to avoid burn-through.

 2. Welding Position: Different positions (flat, horizontal, vertical, or overhead) may affect how you set your amperage. The flexibility of the 7018 welding rod accommodates all positions, but you should still adjust accordingly for optimal results.

3. Travel Speed: The speed at which you move the electrode can influence the amount of heat input. A slower travel speed can require lower amperage, while a faster speed may need increased amperage for sufficient heat.

Mastering the basics of welding with 7018 welding rods, particularly understanding the necessary amperage settings, is essential for achieving high-quality welds. By recognizing the relationship between rod diameter and amperage, along with considering factors such as material thickness and welding position, you can enhance your welding skills significantly.

In your welding endeavors, whether you're a hobbyist or a professional, remember the importance of matching the amperage to your specific project requirements. With practice and attention to detail, you will contribute to creating durable and reliable welds that stand the test of time.