Welding Heat Input Calculator
Calculate welding heat input (kJ/mm) from voltage, current, and travel speed per AWS and ISO standards.
How to Use the Welding Heat Input Calculator
- Enter the arc voltage in volts from your welding parameters.
- Enter the welding current in amperes.
- Enter the travel speed in mm/min.
使用场景
- •Qualifying welding procedures to code requirements.
- •Controlling HAZ properties in structural and pressure vessel welding.
- •Documenting weld parameters for quality records.
公式
Heat Input (kJ/mm) = (Voltage × Current × 60) / (Travel Speed mm/min × 1000).
常见问题
Why does heat input matter in welding?
Heat input affects the heat-affected zone (HAZ), distortion, and mechanical properties. Too much heat can cause grain growth and reduced toughness; too little can cause lack of fusion.
What is a typical heat input for structural steel?
For most structural steel welding, heat input ranges from 0.5 to 3.5 kJ/mm. High-strength steels often require limits below 2.5 kJ/mm.
Is this calculator free?
Yes, all OhMyCalc calculators are completely free to use.