Centrifugal Casting Process
Our solid high silicon cast iron anodes are centrifugal chill cast. The casting mold rotates at over 1000rpm producing a g-force that eliminates any trapped gas from silicon iron and throws any impurities to the inside bore of the anode where they do not hinder anode performance. Hence, the metal matrix is tight and dense; increasing the life of the anode.
Compact Structure
Due to the consistent weight and greater density of the anode, there is less flake grain boundaries and lower chemical segregation. No gas porosity, no internal shrinkage and no non-metallic inclusions.
Chemical Composition
| Element | ASTM A518 / A518M Grade 1 (Si – Fe) | ASTM A518 / A518M Grade 3 (Si – Fe – Cr) | BS 1591 1975 |
| Silicon (Si) | 14.2% ~ 14.75% | 14.2% ~ 14.75% | 14.25 ~ 15.25% |
| Chromium (Cr) | 0.5% max. | 3.25% ~ 5.0% | 0.5% max. |
| Manganese (Mn) | 1.5% max. | 1.5% max. | 0.5% max. |
| Copper (Cu) | 0.5% max. | 0.5% max. | — |
| Molybdenum (Mo) | 0.5% max. | 0.2% max. | — |
| Carbon (C) | 0.65% ~ 1.1% | 0.7% ~ 1.1% | 1.4% max. |
| Phosphorus (P) | — | — | 0.25% max. |
| Sulphur (S) | — | — | 0.1% max. |
| Iron (Fe) | Remainder | Remainder | Remainder |
Note: ASTM A518 Grade 3 chemistry is particularly suited for more severe environments(such as brackish water or saltwater), where the level of chromium is elevated to enhance anode performance.
