Le Welding Distortion Calculator provides a preliminary estimate of angular distortion or transverse shrinkage based on welding process, material, plate thickness, weld type, and heat input. Use it to compare welding conditions and plan distortion control measures. Actual results vary with weld sequence, joint design, restraint, and shop conditions, so treat the estimate as a planning reference.

Inputs

Calculation mode
Process & material

Sets the default thermal efficiency.

Joint geometry

Choose multi-pass to enter the number of passes.

Heat input

Decimal between 0 and 1 (for example 0.8 = 80%).

Heat input (kJ/mm) = V × A × η × 60 ÷ (travel speed [mm/min] × 1000)

Restraint & tacking (optional)

More restraint can reduce visible movement but raises residual stress.