Can this replace WPS/PQR requirements?

Q: What is the welding heat-input formula?

A standard estimate is H(kJ/mm) = ((V × I × 60) / (S × 1000)) × η, where V is voltage, I is amperage, S is travel speed in mm/min, and η is thermal efficiency. The calculator converts in/min to mm/min automatically when needed.

Q: Why does travel speed change heat input so much?

Heat input is inversely proportional to travel speed. Slower travel puts more energy into each millimeter of weld, raising heat input, while faster travel lowers energy per unit length.

Question

Can this replace WPS/PQR requirements?

Accepted Answer

No. This is a planning and QA estimate. Production welding still requires qualified procedures and compliance with project code/specification limits for heat input, interpass temperature, and metallurgy controls.

Can this replace WPS/PQR requirements?

Answers