Q235 and Stainless Steel Welding: Is It Possible?

To be sure, it can be welded, which belongs to the welding of dissimilar steels;

Stainless steel electrode shall be selected according to the material of stainless steel, and stainless steel and carbon steel shall be welded according to the material of stainless steel (Q235 belongs to carbon steel).

There are general principles for welding between dissimilar steels:

  • Carbon steel is matched with the welding rod according to the strength. If the strength of two carbon steel materials is different, it is generally based on the lower one, such as the welding of Q245R and Q345R, J427 welding rod is selected
  • If heat-resistant steel is welded with carbon steel, carbon steel is generally selected;
  • If carbon steel is welded with stainless steel, stainless steel electrodes are generally used, such as A302, A312, etc.

Common dissimilar steel welding:

Joint steel grade Manual arc welding Submerged arc welding
Welding rod Copper number of welding wire Flux
Model Corresponding brand example Model Corresponding brand example
Q235-A+16Mn E4302 J422 H08 HO8Mn HJ401-H08A
HJ431 20, 20R+16MnR E4315 J427 H08MnA HJ401-H08A
HJ431 E5015
J507 Q235-A+0Cr18Ni10Ti E1-23-13-16 / / /
A302 E1-23-13 Mo2-16
A312 20R+OCr18Ni10Ti E1-23-13-16 / / /
A302 E1-23-13 Mo2-16
A312 16MnR+0Cr18Ni10Ti E1-23-13-16 / / /
A302 E1-23-13 Mo2-16

0Cr18Ni10Ti is American Standard 321 stainless steel.

Since quality is very important, stainless steel electrodes must be used for welding instead of carbon steel electrode.

Of course, welding between dissimilar steels is not recommended, because carburizing reaction will occur in contact between stainless steel and carbon steel, and stainless steel will be brittle.

Leakage and explosion accidents are easy to occur when used in low cold environment or high pressure. Please be careful.

About The Author

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top