IS 4827 specifies dimensions for coated welding electrodes — core wire diameter, coating thickness, length, and concentricity. 4.0mm core × 450mm is the most common size for structural welding.
Dimensional requirements for covered metal arc welding electrodes — core wire diameter, overall diameter, length, and concentricity.
Key Values
3.15mm coreOverall 4.0-5.0mm, length 350mm
4.0mm coreOverall 5.0-7.0mm, length 450mm
ConcentricityMax 0.3mm eccentricity
Practical Notes
! 4.0mm is the most common electrode size for general structural welding.