Hexoloy^® Seal Blanks

Sintered Silicon Carbide Blanks

Low volume Hexoloy^® SA sintered silicon carbide blanks are available in a range of outer and inner diameter combinations.These blanks are typically less than 25.4 mm thick, though thicker blanks are available.

High volume blanks with quantities over 500 pcs are available as dry-pressed product up to 130.18 mm outer diameter. Blanks are typically unground and sold with ‘as-fired’ tolerances.

Exceptional hardness
Chemically inert to a wide range of chemicals

Seal face and seat for mechanical seals used in industrial pumps

Hexoloy^® SA Properties

Physical Properties	Units	SA
Composition (phases)		SiC
Density	g/cm³	3.10
Grain Size	Qm	4-10
Hardness (Knoop)**	kg/mm²	2800
Flexural Strength 4pt. @ RT***	MPa x10³lb/in²	380 55
Flexural Strength 3pt. @ RT***	MPa x10³lb/in²	550 80
Compressive Strength @ RT	MPa x10³ lb/in	3900 560
Modulus of Elasticity @ RT	GPa x10⁶ lb/in	430 62
Weibull Modulus (2 parameters)		10
Poisson Ratio		0.14
Fracture Toughness @ RT Double Torsion & SENB	MPa x m^½ 10³lb/in²x in^½	4.60 4.20
Coefficient of Thermal Expansion RT to 700°C	x10^-6mm/mm°K x10^-6in/in°F	4.02 2.20
Max. Service Temp (air)	°C °F	1900 3450
Mean Specific Heat @ RT	J/gm°K	0.67
Thermal Conductivity @ RT	W/m°K Btu/ft h°F	125.6 72.6
@ 200°C	W/m°K Btu/ft h°F	102.6 59.3
@ 400°C	W/m°K Btu/ft h°F	77.5 44.8
Permeability RT to 1000°C		All impervious to gases over 31 MPa
Electrical Resistivity @ RT*** @ 1,000°C	ohm-cm	10²-10⁸ 0.01-0.2
Emissivity		0.9

* Composition code: Si = free silicon metal; C = free graphite; SiC = silicon carbide
* Knoop 100-gm load
*** Test Bar Size: 3 x 4 x 45 mm (0.118" x 0.157" x 1.772")
*** Dependent upon dopants in Hexoloy^® SA SiC which will decrease electrical resistivity

These blanks are typically less than 25.4 mm thick, though thicker blanks are available. High volume blanks with quantities over 500 pcs are available as dry-pressed product up to 130.18 mm outer diameter.