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How to Weld Steel to Stainless Steel – An Overview

How to Weld Steel to Stainless Steel

Welding steel to stainless steel can be tricky, but with the right equipment and knowledge, it can be done successfully. If you’re looking to weld two pieces of metal together, it’s important to understand how these materials behave and which techniques will best suit your project. Let’s look at what you need to know about welding steel to stainless steel.

Welding Processes for Joining Steel and Stainless Steel

The two most common processes for welding steel and stainless steel are shielded metal arc welding (SMAW) and gas metal arc welding (GMAW). SMAW is often referred to as stick welding, while GMAW is commonly known as MIG or wire-feed welding. Both processes use electricity to join the metals together, although they do so in different ways.

When using SMAW, an electric current passes through an electrode rod that melts into a puddle of molten metal. This molten metal then fuses the two pieces of metal. GMAW uses a continuously fed wire electrode that melts into the puddle of molten metal before cooling off and solidifying. It’s important to note that both processes require specialized equipment, such as a welder, electrodes, and other tools, depending on the project.

How Each Process Affects Metal Properties

When you weld steel to stainless steel with either SMAW or GMAW, you need to consider how each process affects the metals’ joined properties. The heat from SMAW tends to cause more warping due to its slower cooling rate than GMAW. Additionally, the slag from SMAW needs more time for cleaning than other methods like MIG or TIG welding. On the other hand, GMAW produces less warping because it cools faster than SMAW; however, it can also leave behind oxides that must be cleaned off afterward.


No matter which method you choose when welding steel and stainless steel, understanding their respective effects on your metals is key to completing your project. Both shielded metal arc welding (SMAW) and gas metal arc welding (GMAW) have their benefits based on what kind of material you’re working with and what kind of finish you want on it afterward – so make sure you do your research beforehand! With the right equipment and knowledge base in mind, joining two pieces of steel or stainless steel together can be done quickly and efficiently!

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