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.
