Hexoloy® Grades
After developing Hexoloy® SiC materials for over 30 years, our innovative engineers have allowed Hexoloy to evolve and perform in a wide variety of applications. Where the standard material just won’t do, the research and development of the Hexoloy portfolio allows key properties to outperform depending on your specific need.
Saint-Gobain's application engineers are available to assist you with your technical project in designing cost effective high performing products that will meet your need now and in the future.
Hexoloy® Grade Properties
| Property | Units | Hexoloy® SiC Grades -- Typical Values | ||
| SA | SP | SG | ||
| Composition (phases) | - | SiC | SiC | SiC + C |
| Density | g / cm3 | 3.10 | 2.95 - 3.05 | 2.95 |
| Grain Size | microns | 4 - 6 | 4 - 6 | n/a |
| Hardness (Knoop)* | 2800 | 3100 | n/a | |
| Flexural Strength 4pt @ RT** | MPa x103 lb / in2 | 380 55 | 240 | n/a |
| Compressive Strength @ RT | MPa x103 lb / in2 | 3900 560 | n/a | n/a |
| Modulus of Elasticity @ RT | GPa x106 lb / in | 410 59 | 400 | 370† 53† |
| Weibull Modulus (2 parameters) | 8 | 19 | n/a | |
| Poisson Ratio | 0.14 | 0.14 | n/a | |
| Fracture Toughness @ RT Double Torsion & SENB | MPa / m x103 lb / in2 / √in | 4.60 4.20 | 4.60 4.20 | 4.60 4.20 |
| Coefficient of Thermal Expansion RT to 700°C | x10-6 mm / mm °K x10-6 in / in °F | 4.02 2.20 | 4.3 3.0 | 4.05† 2.22† |
| Maximum Service Temp. (air) | °C °F | 1650 3000 | 1650 3000 | 1300† 2372† |
| Mean Specific Heat @ RT | J / gm°K | 0.67 | 0.59 | 69† |
| Thermal Conductivity @ RT @ 200°C @ 400°C | W / mK Btu / ft h °F | 125.6 72.6 102.6 59.3 77.5 44.8 | 110 n/a n/a | 120† 69† n/a n/a |
| Permeability @ RT to 1000°C | All impervious to gases over 31 MPa | |||
| Electrical Resistivity @ RT*** @ 1000°C | ohm-cm | 102 - 106 0.01-0.2 | n/a | <1 n/a |
| Emissivity | 0.9 | 0.9 | n/a | |
| * Test bar size: 3.2 x 6.4 x 50.8 mm (1/8" x 1/4" x 1/2") ** Knoop 1000-gm load *** Dependent upon dopants in Hexoloy SA SiC that will decrease electrical resistivity to a desired range † Estimated | ||||