Electroslag Welding Calculator

Calculate ESW parameters for single-pass vertical welding of heavy plates.

ESW Process Type

Base Material

Plate Thickness

Unit

Joint Gap

Leave blank for recommendation

Weld Length

mm (for time estimate)

Number of Electrodes

Electrode Diameter

Flux Type

ESW Parameters

Deposition Rate

Electrical Parameters (per electrode)

Welding Current -

Arc Voltage -

Total Power -

Feed & Travel

Electrode Feed Rate -

Vertical Rise Rate -

Est. Weld Time -

Oscillation Parameters

Oscillation Width -

Oscillation Speed -

Dwell Time -

Setup

Recommended Gap -

Slag Pool Depth -

Electrode Spacing -

Electrodes vs Plate Thickness

Thickness	Electrodes	Gap
25-40mm	1	20-25mm
40-80mm	2	25-30mm
80-150mm	3	28-35mm
150-300mm	4+	30-40mm

Electroslag Welding Fundamentals

Process Characteristics

ESW is a single-pass welding process for vertical joints in heavy plates. The process uses resistive heating in a molten slag pool to melt the electrode and base metal. No arc is present during steady-state welding.

Advantages

Single Pass: Any thickness can be welded in one pass
High Deposition: 15-35 kg/hr typical, depending on setup
Low Distortion: Symmetrical shrinkage minimizes angular distortion
No Edge Prep: Square edge joint preparation

Critical Parameters

Slag Pool Depth: 35-50mm typical, affects heat distribution
Electrode Immersion: Keep consistent for stable process
Copper Shoes: Water-cooled, must maintain good contact
PWHT: Usually required due to large grain size in HAZ