Siliconized graphite is obtained as a result of high-temperature processing of artificial graphite products with molten silicon. Siliconized graphite consists of an unusually hard skeleton of silicon carbide and free graphite. This combination provides a set of valuable physical and chemical properties – unusually high heat resistance and heat resistance, resistance to multiple heat changes and aggressive media, high antifriction properties. The wear resistance of products made of siliconized graphite is 5-10 times higher than that of similar products made of non-siliconized graphite, suitable for work in concentrated boiling acids and solutions of alkalis and salts.
The grade of siliconized graphite is determined by the original type of graphite material subjected to siliconization.
This material is excellent for the manufacture of rings and bushings for mechanical seals, and for other types of similar devices.
Physical and mechanical properties
| Siliconized graphite grade | SG-M | SG-P | SG-T |
| Density, g/cm3 | 2,25 – 2,4 | 2,4 – 2,5 | 2,5 – 2,7 |
| Tensile strength, MPa | |||
| in stretching | 30 – 40 | 60 | 40 – 50 |
| in compression | 130 – 160 | 420 – 450 | 300 – 320 |
| in bend | 70-90 | 100 – 120 | 90-110 |
| Impact strength, J cm3 | 29,56 | 40,8 | 29,56 |
| Hardness, HRC | 40-50 | 50-70 | 65-78 |
| Thermal conductivity, W / (M * °C) | 120 | 130-150 | 85-100 |
| Temperature coefficient of linear expansion at 20-100°С а*106*°С-2 | 4,2 | 4,2 | 4,6 |
| Phases content, %: | |||
| silicon carbide | 30 | 50-70 | 50 |
| free silicon | 10-15 | 5-10 | 25 |
| free carbon | rest | rest | rest |