Why do so many trust Hexoloy®?
The basic properties outlined below have made Hexoloy silicon carbide ideal for engineers selection in any application. Our customers range from chemical and slurry pump seals and bearings, nozzles, pump and valve trim, paper and textile equipment components, display glass, protective armor and more.
Think of all the applications where the properties of Hexoloy silicon carbide materials can make a big difference.
Hexoloy Silicon Carbide makes a big difference because. . .
Hexoloy® SiC Material -- It's hard
- Hexoloy silicon carbide is one of the hardest high performance materials available, second only to diamonds.
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Hardness (Knoop): 2800 kg/mm2 at room temperature
Hexoloy® SiC Material -- It resists heat
- The high working temperature of Hexoloy silicon carbide, combined with its low thermal expansion, produces excellent thermal-shock resistance far better than tungsten carbide, aluminum oxide and RB silicon nitride. These properties make it a promising candidate to replace ductile metals in high-temperature applications.
- Maximum use temperature: 1700ºC
Hexoloy® SiC Material -- It's universally corrosion resistant
- The high density, low porosity and chemical inertness of Hexoloy silicon carbide permit it to function in environments of hot gases and liquids, in oxidizing and corrosive atmospheres, and in strong acids and bases, even at extremely high temperatures.
- It resists corrosion, oxidation and erosion that outperforms tungsten carbide and coated stainless steel.
Hexoloy® SiC Material -- It's light
- Actual use of Hexoloy silicon carbide parts indicates extremely high strength and excellent resistance to creep with a stress rupture at temperatures up to 1700°C (3092°F) for sintered alpha silicon carbide.
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Flexural strength (4 pt.): 55,000 psi (380 MPa)
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Fracture toughness: 4.20 x 103 lb/in2 x in½
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Modulus of elasticity (RT): 59 x 106 lb/in2 (410 GPa)
Hexoloy® SiC Material -- It's dense
- Densities of fired parts are consistently in excess of 98 percent of the theoretical density of silicon carbide - 3.21 g/cm3.
- Hexoloy density is at least 3.10 g/cm3
Hexoloy® SiC Material -- It's wear resistant
- The extreme hardness and density of Hexoloy silicon carbide make it ideal for applications where parts are subject to high abrasion and sliding wear.
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Specified wear rate (pin on disc): SiC vs. SiC 1 x 10-9 mm2/kg
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Coefficient of friction (pin on disc): SiC vs. SiC 0.2
Hexoloy® SiC Material -- It conducts heat
- The high thermal conductivity of Hexoloy silicon carbide, combined with its low thermal expansion, produces excellent thermal-shock resistance far better than tungsten carbide, aluminum oxide and RB silicon nitride. These properties make it a promising candidate to replace ductile metals in high-temperature applications.
Hexoloy® SiC Material -- It can promote lubrication
- Through the addition of spherical pores, the SP material has small, discrete, non-interconnecting fluid or "pore" mechanisms improving upon the exceptional friction properties of SA. On the surface the pores help to promote the retention of a fluid or lubricant film at the sliding surface component level which allows the component to perform exceptionally well against itself of other seal face materials.
Hexoloy® SiC Material -- It requires minimum machining
- The as-fired surface finish of Hexoloy silicon carbide parts is excellent (about 32-64 microinches). This surface quality, combined with tight dimensional control, yields parts that should require little or no additional machining or finish grinding, depending on application.
Hexoloy® SiC Material -- It can be formed into complex shapes
- New developments by Saint-Gobain researchers in the use of bonding agents and other additives now permit the mass production of complex shapes of Hexoloy silicon carbide by extrusion; pressure forming, with bidirectional or isostatic presses at room temperature; plus the advanced green machining capability allows advanced shapes not possible with most ceramics.