Minimum welding-consumable grade (1Y, 2Y, 3Y, 4Y, 5Y) required to match a parent-steel grade per IACS UR W27 - the rule used by every class for procurement and WPS qualification.
Formula
$$ \text{Grade}{cons} \geq \text{Grade}{parent} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $Y grade$ | Yield strength series (1/2/3/4/5) | - | IACS UR W27 |
| $Temp suffix$ | Charpy impact-test temperature | °C | IACS UR W27 Table 1 |
Sources
- IACS UR W27 Rev.3.