PWHT Calculator
Calculate post-weld heat treatment parameters including hold temperature, hold time, heating rate, and cooling rate per ASME guidelines.
Inputs
Results
Hold Temperature
1,100 °F
Total Hold Time
1 hrs
How to Use This Calculator
- Enter Material Thickness, Material Type, and Hold Temperature Override.
- Set Hold Time per Inch.
- Review Hold Temperature (°F) and Total Hold Time (hrs).
- Use Max Heating Rate (°F/hr) and Max Cooling Rate (°F/hr) to inform your decision.
- Use the chart to visualize the results and explore different scenarios by adjusting inputs.
What each input means
- Material Thickness
- Thickness of the thickest joint member requiring PWHT.
- Material Type
- 1 = Carbon Steel, 2 = Low Alloy (Cr-Mo), 3 = Stainless Steel.
- Hold Temperature Override
- Override the hold temperature. Set to 0 to use default for the material type.
- Hold Time per Inch
- Soak time per inch of thickness (typically 1 hr/in for carbon steel).
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersMaterial Thickness = 1, Material Type = 1, Hold Temperature Override = 0, Hold Time per Inch = 1 = 4 input(s) provided
- Calculate Hold TemperatureHold Temperature1100 = 1100
- Calculate Total Hold TimeTotal Hold Time1 = 1
- Calculate Max Heating RateMax Heating Rate400 = 400
- Calculate Max Cooling RateMax Cooling Rate500 = 500
Engine last updated . Checked against 4 independently-derived tests — how we verify calculators.
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