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Welding Heat Input Calculator

Last modified by
on
Nov 9, 2023, 3:22:02 PM
Created by
on
Jul 27, 2021, 9:09:18 PM
H=60IE1000S
(E)Arc Voltage
(I)Current
(S)Travel Speed

The Welding Heat Input Calculator finds the amount of heat or thermal energy that is introduced to a material when a weld is made using the arc voltage, current, and travel speed.

INSTRUCTIONS: Choose units and enter the following:

  • (E) Arc Voltage
  • (I) Current
  • (S) Travel Speed

Welding Heat Input (H): The calculator returns the answer in kilojoules per inch (kJ/in). However this can be automatically converted to compatible units via the pull-down menu.https://www.vcalc.com/attachments/4a6c6dc8-ef20-11eb-8eb2-bc764e203090/Welding Mask_adobespark.jpg

The Math / Science

Arc voltage, current, and travel speed directly affect heat input. Heat input is often associated with cooling rates of the heat-affected zone and the weld. Heat input is also directly proportional to the individual weld bead cross-sectional size. For example, the size of a fillet weld increases as the heat input increases. 

To find the welding heat input, use the formula:

H = (60⋅E⋅I) / (1000⋅S)

where:

  • H = heat input
  • E = arc voltage
  • I = current
  • S = travel speed


Welding Calculators:

 


Fabrication Calculators and Constants

References

Tools for Reviewing Welding Procedures (https://app.aws.org/mwf/attachments/11/253611/TOOLSFORREVIEWINGWELDINGPROCEDURES.pdf)

Bridge Welding Reference Manual (https://www.fhwa.dot.gov/bridge/steel/pubs/hif19088.pdf)


This equation, Welding Heat Input Calculator, is used in 1 page
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