ThePipingMart Blog Metals How To Weld Corten Steel?

How To Weld Corten Steel?

how to weld corten steel

Corten steel is quickly becoming the material of choice for various outdoor projects. It has a unique rust-like appearance, making it an eye-catching addition to any landscape or architectural design. But if you plan on welding corten steel, you’ll need to know a few things first. Let’s take a closer look at what makes welding corten steel so tricky and how you can successfully weld it with ease.

What Is Corten Steel?

Before we dive into the specifics of welding corten steel, let’s start by taking a closer look at what it is. Corten steel is a type of metal that contains copper, chromium, and phosphorus as major alloying elements. It’s also known as weathering steel because its unique composition allows it to develop an attractive rust-like finish when exposed to air and moisture over time. Because of this property, corten steel is often used for outdoor sculpture, landscaping features, or building facades where its natural beauty can be appreciated by all who see them.

Corten Steel Welding Challenges

Welding corten steel isn’t like ordinary welding steel—it requires some extra steps to ensure that your welds are solid and durable. That’s because the high levels of copper in corten steel can cause corrosion in the weld itself if proper precautions aren’t taken. To prevent this from happening,

Here are some tips for the successful welding of corten steel:

Use low hydrogen electrodes

Low hydrogen electrodes are designed specifically for use with metals like corten steel that contain higher amounts of copper and other alloying elements. These types of electrodes will help reduce porosity in your welds while also preventing cracking due to thermal shock during cooling periods.

Use preheat and PWHT

Preheating (also known as preheating) and post weld heat treatment (PWHT) are both important steps when welding corten steel. Preheating helps minimize thermal shock in your welds, while PWHT helps ensure that all internal stresses are relieved after completing welding. This will help create stronger welds that won’t crack under stress over time.

Use shielding gas

Shielding gas also plays an important role when welding corten steel, as it helps protect your weld pool from contamination by atmospheric gases like oxygen and nitrogen, which can lead to porosity and other problems with your welds if not prevented properly. Shielding gas should be kept at the correct flow rate throughout the entire duration of your weld to achieve optimal results.


Welding corten steel requires some extra steps compared to ordinary steels—but with the right tools, techniques, and knowledge, you can easily tackle even complex projects involving this special metal alloy without any issues! By following these tips, you should have no problem achieving strong, durable welds every time—so get out there and get started! And don’t forget safety first; always wear protective gear, such as gloves, face shields, respirators, etc., when performing any metal fabrication task!

Related Post