Arc heat input Q = V·I·60 / (v·1000) - a key control parameter for thick-plate steel welding and hardness prevention.
Formula
$$ Q = \eta \cdot \frac{V \cdot I \cdot 60}{v \cdot 1000} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $V$ | Arc voltage | V | meter |
| $I$ | Welding current | A | meter |
| $v$ | Travel speed | mm/min | WPS |
| $η$ | Arc-process efficiency | - | AWS D1.1 / ISO 15614 |
Sources
- AWS D1.1 - Structural welding code steel.
- IACS UR W11 / W22.