WPS Heat Input Range Calculator

Calculate qualified heat input range for a Welding Procedure Specification per ASME IX and AWS D1.1 essential variable rules

Input Parameters

Results

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PQR Heat Input
kJ/in
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Max Qualified Heat Input
kJ/in
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Min Qualified Heat Input
kJ/in
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Qualification Note
Note: Heat input controls weld cooling rate, which affects HAZ properties, grain size, and toughness. Higher HI = slower cooling = softer HAZ but potentially lower toughness.

Reference

Heat Input = (V x I x 60) / (Travel Speed x 1000) [kJ/in] ASME IX QW-409.1: HI is supplementary essential when impact testing required AWS D1.1: Typically +/-25% of PQR value API 1104: Typically +/-20% of PQR value