Can You Weld Stainless Steel With Flux Core?

Have you ever wondered how can you weld stainless steel with flux core? You have often heard that you can weld stainless steel with gas. But, you might not want to do that and look for alternatives—no need to worry because today, we are here with the perfect solution for you.

Welding stainless steels using flux-cored arc welding is common. This procedure has few drawbacks, and it is actually preferred for heavy welding plates in a short amount of time. Weld deposit rates are much greater than with other welding methods.

MIG welding wire with flux core wire is a faster procedure, and the wire has a high deposition rate; therefore, it’s the best choice for stainless steel welding. You may now choose the best stainless steel flux core wire for your welding project, whether it’s self-shielded or gas shielded, based on the sort of welding you’ll be doing.

The process might still seem confusing, but down below, we will discuss the whole process in more detail to make it easier for you to understand.

What metals can you weld with flux core?

You cannot only weld stainless steel with flux core technique, but you can weld a variety of different metals. However, when it comes to wire feed welder, a question pops up can you weld stainless steel with a regular wire feed welder.

The answer is yes, you can. Stick and wire feed welders may both be used to weld stainless steel; however, you must use gas if you use a wire feed welder. This is due to the fact that stainless steel does not come in a flux-cored form. So, the best choice that remains is the use of flux core arc welding.

Flux core is compatible with a wide range of metals, including stainless steel, nickel, and steel alloys. Furthermore, arc welding is compatible with most carbon steels, cast iron, and hard-facing surface alloys. However, this welding process cannot be used to join exotic nonferrous metals like aluminum.

Another common question often comes can you weld stainless steel with a gasless MIG welder.

Stainless steel may be completely welded without the use of gas. Stainless steel rods are available for SMAW, often known as stick welding. Moreover,   the final product is completely rust-free, and when done correctly, it looks like a bigger version of GTAW, often known as tig.

Tips when welding stainless steel with flux core

When you go on to weld stainless steel with flux core, you will find that it is not an easy process like welding with a MIG welder. However, if you follow the tips that we will discuss below, your welding work with flux core will be much easier.

• Check the polarity settings

Before you begin any welding process, make sure to check the required polarity of the wire which you will be used for stainless steel flux cored arc welding.

When you use a wire with the incorrect polarity, you’ll get a tremendous quantity of big splatter. Buckshot splatter is how some people refer to it. As a result, never use a wire with the opposite polarity than the one recommended.

• Adjust wire speed

Amperage and wire speed are inextricably linked. Lower amperage indicates slower wire speeds, whereas greater amperage means faster wire speeds.

When you weld at a low wire speed, you’ll get a lot of spatter, and when you weld at a high wire speed, the wire will stub and push.

• Control weld travel speed

Fast weld travel causes the weld to become excessively ropey and the weld bead to become overly thin. Whereas slow weld travel will cause your bead to crown high, and the slag will not adequately cover the weld.

This will begin to reveal the weld around the crown, causing the metal to become gray. You’ll almost certainly have porosity issues, and the weld may corrode.

• Maintain proper working distance

When the working distance is too short, the flux will not be sufficiently warmed, resulting in inadequate flux coverage. Your weld will likely be dark on top, similar to sluggish travel speed, and you’ll most likely have porosity difficulties.

However, if your work distance is too high, it will be more difficult to manage the weld, and you may notice ripples in the weld bead.

• Use slag and drag

This is a standard tip for any type of stainless-steel flux core welding. You’re enabling the flux to ascend to the top of the weld pool and give you appropriate coverage by pulling the electrode.

Otherwise, slag inclusions in your weld bead may cause problems. A 10 degree drag angle is required for a flawless welding masterpiece.

• Trim the wire tip

Every time you lay a bead, you must trim the wire tip. If you don’t cut the wire, you’ll typically end up with a silicon blob at the tip, which will screw with your start.

Which flux core is good for stainless steel?

When it comes to types of flux core for stainless steel, there are two options available.

  • Gas shielded Flux Core wire
  • Self-Shielded Flux Core wire

Gas shielded flux core wire

When melted, gas shielded flux core wire generates a protective slag surrounding the metal. This sort of core is used to weld vertically oriented metals. The molten metal is kept from splashing by the slag.

After you’ve finished welding two pieces of metal together, you’ll need to clean up the slag, which is a simple operation.

Self-shielded flux core wire

Self-shielded flux core wires are self-contained and hence form their own gas shielding when melted. Because of their rapid deposition rate, self-shielded wires are mostly utilized to fuse large metal objects. Using such wires to weld metal, in this example, stainless steel, is also a faster method.


To sum up, the answer to the question is, can you weld stainless steel with flux core? Yes, you can. However, you need to understand the whole process before applying it.

Hence, If you need to link mild steel to stainless steel flux core, this is the tool to use. Use flux core wire made of stainless steel.