250 mm and 350 mm

350 mm and 450 mm

400 mm and 500 mm

500mm and 600mm

Fine

Medium

Course

Rough

Covered electrode

Increase metal recovery

Hydrogen controlled electrode

Radio graphic quality electrode

0.05% to 0.30%

0.05% to 0.8%

0.30% to 0.6%

0.6% to 1.2%

Over lap

Under cut

Lack of fusion

Lack of penetration