What kind of welding rod used for channel steel?
20 steel can use knot 422, knot 423, knot 424, knot 425; strength high occasion, knot 506, knot 507. 304 steel with Austria 102, Austria 107, Austria 002 welding rod.
Electrode used to see the material, Q235-A election J422, Q345 election J506... The thickness of channel section
Manual arc welding, the use of strength grades T50 electrode: knot 506, knot 507, knot 502, knot 503, knot 552, knot 553, etc.;
