What's the difference between 506 electrode and 502 electrode?
502 is an acid welding rod, welding process is good, but the crack resistance of welds is not as good as 506. 506 is alkaline welding rod, welding process is slightly worse, the weld is low hydrogen type, crack resistance is good. Two kinds of welding rod can be AC and DC dual-use.
Agree with wangjun7307's point of view.
The biggest difference between J506 and J502 is the ingredient in the skin:506 is low hydrogen potassium type, baking temperature 350~380, high requirements can be used 506, welding seam for low hydrogen type, crack resistance is good. But the process requires high oil, rust, water must be removed,502 is the calcium titanium type, not baking. Beautiful shaping and easy to remove slag.
