High Temperature Structural Graphite
Product overview
The SG 670 and 690 types of graphite is a high temperature structural graphite with good properties, especially: high purity, thermal resistance, good mechanical strength and electrical conductivity in high temperature. This graphite is manufacture in pressed blocks and rods forms with medium grained structure, which ensure smooth surface on level Ra 2,5 of final elements.
Properties
The SG graphites fulfils the high criteria of durability and resistivity. Among the main SG properties should be notice:
- Medium grain structure with good finished surface.
- Good resistance to wetting by the molten metal.
- Excellent thermal conductivity and heat removal.
- High resistance of thermal shock up to 2500°C.
| Parameter / Type | Standard | Unit | SG 670 | SG 690 |
|---|---|---|---|---|
| Bulk density | ASTM C838-96 | g/cm3 | 1,72 | 1,65 |
| Porosity | ASTM C559-90 | % | 20 | 24 |
| Grain size | SEM detector | μm | <800 | <800 |
| Flexural strength | ASTM C651 | MPa | 13,5 | 8 |
| Compressive strength | ASTM C695 | MPa | 30 | 18 |
| Young module | ASTM C469-94 | GPa | 10 | 8 |
| Shore D hardness | - | SHD | 35 | 30 |
| Resistivity S.R.E. | ASTM C611-69 | μΩm | 7 - 9 | 9 - 11 |
| Thermal conductivity | ASTM E1225-9 | W/mK | 140 | 110 |
| Thermal expansion CTE at 100°C | ASTM E228-11 | 10-6/K | 3,5 | 2,9 |
| Carbon content (purity) | ASTM C561-91 | % | 99,9 | 99,7 |
| Maximum block sizes | - | mm | 800x500x1800 | 400x400x1800 |
Typical impurities
Graphite contains carbon and ash only, this is the ash analyse:
| Contains max. | Al | B | Ca | Fe | Ni | Si | Ti | V | Total ash |
|---|---|---|---|---|---|---|---|---|---|
| density | 2 | 5 | 400 | 80 | 10 | 10 | 10 | 20 | 900 |