What welding wire is used when welding SUS321 stainless steel?

When choosing welding rods and welding wires for 321 stainless steel welding, factors such as welding process requirements, welding environment, and cost need to be considered. The following is a detailed analysis of the selection of materials for 321 stainless steel welding to help you choose more suitable welding rods and welding wires.

First, let's take a look at the basic characteristics of 321 stainless steel. 321 stainless steel is an austenitic stainless steel containing titanium, which has good corrosion resistance, mechanical properties and welding properties. It is mainly used in chemical, petroleum, pharmaceutical and other industries.

For 321 stainless steel welding, the following are several commonly used welding wires:

1. Welding wire

- ER316L: This is a stainless steel welding wire with a lower carbon content, suitable for all-position welding. Its advantages are good welding forming, strong corrosion resistance, and fast welding speed. But the cost is relatively high.

- ER347: This is a stainless steel welding wire containing a stabilizer (titanium), suitable for welding 321 stainless steel. Its advantages are good welding forming, strong corrosion resistance, and fast welding speed. But the cost is relatively high.

So, which welding rod and wire is more suitable for 321 stainless steel welding?
First of all, from the perspective of welding performance, E316L and ER316L welding rods and wires can achieve good welding forming and corrosion resistance when welding 321 stainless steel. But considering the welding speed and cost, E347 and ER347 welding rods and wires have more advantages.
Specifically, if you are concerned about welding speed and cost, it is recommended to choose ER347 welding wire. This welding wire has a fast welding speed, relatively low cost, and stable welding quality. If you pay more attention to welding forming and corrosion resistance, you can choose E316L or E347 welding rods. Both welding rods can achieve good welding forming and corrosion resistance when welding 321 stainless steel.

In short, when choosing welding rods and wires for 321 stainless steel welding, it is necessary to make comprehensive considerations based on actual needs and budget. Here are some suggestions:
- If welding speed and cost are the main considerations, it is recommended to choose ER347 welding wire.
- If welding forming and corrosion resistance are the main considerations, it is recommended to choose E316L or E347 welding rod.
- If the welding environment is more complex, it is recommended to choose E347 welding rod to improve welding quality.