Galvanizing Coating Thickness (ISO 1461 / IS 4759)
ISO 1461 / IS 4759 specify minimum mean coating thickness by the thickness of the steel being galvanised.
| Steel thickness | Min mean coating (approx.) | Approx. coating mass |
|---|---|---|
| ≥ 6 mm | 85 µm | 610 g/m² |
| 3 to < 6 mm | 70 µm | 500 g/m² |
| 1.5 to < 3 mm | 55 µm | 395 g/m² |
| < 1.5 mm | 45 µm | 325 g/m² |
Indicative mean-coating values per ISO 1461; local coating minima and project specs may differ. Coating mass ≈ thickness (µm) × 7.14.
Frequently asked questions
- What coating thickness is used for thick steel?
- For steel 6 mm and thicker, a mean coating of about 85 µm is typical per ISO 1461.
Related resources
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