What type of welding electrode is suitable for welding 20g and Q235 materials?
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What type of welding electrode is suitable for welding 20g and Q235 materials? Is J427 better, or is J422 better? Why? Please advise, experts
J422 should be used; this type of welding rod is common and can meet the requirements.
Both J427 and J422 work. If high requirements are placed on the weld, use J427; J427 is an alkaline electrode that helps to eliminate hydrogen.
What was said on the fourth floor is correct; generally, J422 is sufficient, and J427 is used when there are special requirements. As for J426, it isn’t commonly used, so it’s hard to say for sure
422 can fully meet the requirements; it is all low-carbon steel
Using 422 welding rod will do
Generally, J422 is sufficient. For applications where high mechanical properties of the welds are required in pressure or boiler pressure vessels, J427 or J426 can be used; both are basic welding electrodes that provide high toughness to the welds.
In general cases, 422 is sufficient; for pressure welds on pressure-bearing components such as pressure vessels, it is recommended to use 427, as this can effectively prevent the occurrence of cold cracks.
It depends on the application; J422 is generally used for welding at atmospheric pressure vessels, non-pressure components, and Class I pressure vessels