IACS Unified Requirement W21 - Electrodes for steel. Covered by all member class societies.
Formula
$$ \text{IACS UR W21} \Rightarrow \text{Welding} $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $W21$ | Electrodes for steel | - | IACS website |
Sources
- IACS UR W21.