How to weld 304 stainless steel?
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Dear seniors, how to weld 304 stainless steel, what welding rod should be used, and what are the welding methods?
I’m not aware of the specific details or requirements; you can choose between shielded metal arc welding using A102 electrodes, or TIG welding with ER308 wire. Note that low current multi-pass welding should be used to prevent crack formation.
This is easier to weld. Use A102 welding rod and avoid too high a current; water it after welding to cool it down quickly
We are 3%-10% dilute sulfuric acid, ammonium sulfate saturator. Most are weld leaks. How should this be handled?
Use a DC motor for welding; use A102 welding rod. The current should not be too high, as high temperatures can easily cause the equipment to be damaged
4# ssf2008 is not resistant to corrosion by dilute sulfuric acid, let alone welds; it is recommended to use fiberglass material instead.
4# ssf2008 ammonium sulfate saturator, weld leakage. Material 304 is not appropriate; 316L should be used instead.
Generally, manual arc welding is used with 308L electrodes.
A102 electrodes for welding stainless steel to stainless steel, A302 electrodes for welding stainless steel to carbon steel
DC welder, reverse polarity, low current, fast welding; use A102 for the same type of steel, and A302 for Q345R
The alloying elements in the weld are consumed, reducing its corrosion resistance and increasing the likelihood of stress corrosion. Given your situation, it is recommended to avoid using the traditional A102 and instead opt for A132 welding rod, which contains a Ti stabilizer that helps to reduce stress corrosion. Use low current values for welding, employ multi-layer, multi-pass welding to minimize the amount of heat input, and prevent excessive loss of alloying elements; water cooling may be necessary in such cases.