Manufacturing Engineering
Welding Heat Input Calculator
Calculate the heat energy introduced into a weld joint per unit length. Set arc electrical inputs and observe weld thermal responses dynamically through speed sweep animations, heat-affected zone profiles, and performance curves.
Arc Power
6.00 kW
V * I gross input
Net Heat
4.80 kW
Efficiency adjusted
Output
CSV
Export ready
Parameters
Welding Process
Animated speed sweep
Physics & Calculations
Heat Input Formula
H = (60 * V * I * η) / (1000 * S)
Gross Power (P_gross)
P_gross = V * I / 1000
Net Heat Source (q)
q = P_gross * η
Thermal efficiency (η) represents the fraction of arc heat transferred to the weldment.
Lower travel speed increases heat input, raising the risk of grain growth and distortion.
Linked Process Diagram
Heat Input
0.960kJ/mm
Heat per Meter
960kJ/m
Gross Arc Power
6.00kW
Net Heat Source
4.80kW
Heat Input vs. Travel Speed
Simulation Data Table
| Travel Speed (mm/min) | Heat Input (kJ/mm) | Heat Input (kJ/m) |
|---|---|---|
| 50 mm/min | 5.760 kJ/mm | 5,760 kJ/m |
| 90 mm/min | 3.200 kJ/mm | 3,200 kJ/m |
| 130 mm/min | 2.215 kJ/mm | 2,215 kJ/m |
| 170 mm/min | 1.694 kJ/mm | 1,694 kJ/m |
| 210 mm/min | 1.371 kJ/mm | 1,371 kJ/m |
| 250 mm/min | 1.152 kJ/mm | 1,152 kJ/m |
| 290 mm/min | 0.993 kJ/mm | 993 kJ/m |
| 330 mm/min | 0.873 kJ/mm | 873 kJ/m |
| 370 mm/min | 0.778 kJ/mm | 778 kJ/m |
| 410 mm/min | 0.702 kJ/mm | 702 kJ/m |
| 450 mm/min | 0.640 kJ/mm | 640 kJ/m |
| 490 mm/min | 0.588 kJ/mm | 588 kJ/m |
| 530 mm/min | 0.543 kJ/mm | 543 kJ/m |
| 570 mm/min | 0.505 kJ/mm | 505 kJ/m |
| 610 mm/min | 0.472 kJ/mm | 472 kJ/m |
| 650 mm/min | 0.443 kJ/mm | 443 kJ/m |
| 690 mm/min | 0.417 kJ/mm | 417 kJ/m |
| 730 mm/min | 0.395 kJ/mm | 395 kJ/m |
| 770 mm/min | 0.374 kJ/mm | 374 kJ/m |
| 810 mm/min | 0.356 kJ/mm | 356 kJ/m |
| 850 mm/min | 0.339 kJ/mm | 339 kJ/m |
| 890 mm/min | 0.324 kJ/mm | 324 kJ/m |
| 930 mm/min | 0.310 kJ/mm | 310 kJ/m |
| 970 mm/min | 0.297 kJ/mm | 297 kJ/m |