Carbon steel welding rods (whose deposited metal tensile strength is less than or equal to 500MPa, i.e. 50kgf/mm2) are suitable for welding carbon steel and low strength low alloy steel.

For low hydrogen and iron powder welding rods, the welding rod must be baked at a temperature above 350 ℃ before welding, and should be used as much as possible according to the principle of baking as needed. Otherwise, welding defects (such as porosity, slag inclusion, cracks, deterioration of process performance, etc.) will occur. For cellulose type welding rods, the baking temperature specified in the manual should be strictly followed. If the temperature is too high, it will burn off the cellulose in the coating and damage the inherent process performance of the welding rod.

When using low hydrogen welding rods, the welder should be positioned upwind, strengthen ventilation, and prevent the harm of welding fumes to the body.

For low hydrogen welding rods, the baking frequency should not exceed two times as much as possible to prevent the coating from becoming brittle and falling off.