Tungsten carbide seal grades:
| Grade | Composition (%) | Density (g/cm3) | Hardness (HRA) | T.R.S （N/mm²） |
| YG6 | 6%co 94%wc | 14.85 | ≥92.5 | ≥2000 |
| YG8 | 8%co 92%wc | 14.7 | ≥89.8 | ≥2800 |
| YG10X | 10%co 90%wc | 14.35 | ≥91.5 | ≥3600 |
| YG11 | 11%co 89%wc | 14.4 | ≥88.5 | ≥2900 |
| YG6 | Fine grain alloy, good wear resistance. It is suitable for making carbide sleeves, tungsten carbide bushings, carbide seal rings, wear-resistant parts, etc. |
| YG8 | High bending strength, wear resistance lower than YG6. It is suitable for making carbide sleeves, carbide bushings, tungsten carbide seal rings, wear-resistant parts, etc. |
| YG11 |
Tungsten carbide seal sizes:
| OD (MM) | ID (MM) | Height (MM) |
| 10-800 | 2-400 | 1.5-300 |
We can also make the carbide seal rings as per your drawings.
Tungsten carbide seal ring uses:
Tungsten carbide seal rings are widely used in equipment such as pumps, valves and pipelines in the fields of petroleum, chemical industry, metallurgy, aviation, etc. Its specific applications include:
Petroleum and chemical industry: used for mechanical sealing to prevent medium leakage and external impurities from entering the equipment.
Metallurgy and aviation fields: used for sealing in high temperature and high pressure environments to ensure the stable operation of the equipment.
Tungsten carbide seal ring advantages:
High hardness: Tungsten carbide sealing rings have extremely high hardness, can resist mechanical wear and corrosion, and extend service life. Good sealing performance: Its angular design provides a good sealing effect to prevent leakage and external impurities from entering the equipment.
High temperature resistance: It can operate for a long time in a high temperature environment without losing function, and is suitable for high temperature and high pressure environments.
Corrosion resistance: It adopts corrosion-resistant carbide materials and can resist the erosion of chemical media.
Long life: Due to high hardness and wear resistance, Tungsten carbide sealing rings have a long service life.
High precision: The product is finely ground, with small size and tolerance, and excellent and long-lasting sealing performance.
Good machinability: Cemented carbide materials have good machinability and are suitable for the manufacture of various complex shapes.
Tungsten carbide seal ring details:
FAQ for tungsten carbide seal rings:
Q1: What are tungsten carbide seal rings?
A: Tungsten carbide (WC) seal rings are precision mechanical sealing components manufactured from cemented carbide, primarily available in two common binder systems: WC-Co (cobalt-bound) and WC-Ni (nickel-bound) alloys. They are paired with soft seal faces (carbon graphite, PTFE) or hard mating faces (silicon carbide, stellite) to form mechanical seal assemblies for pumps, compressors, agitators and valves, effectively preventing process fluid leakage.
Q2: What are the common WC grades for seal rings?
A: YG6 / WC-6Co: Cobalt-bound grade with balanced hardness and toughness, suitable for general water, oil and weakly corrosive fluids.
YG8 / WC-8Co: Higher cobalt content for enhanced impact resistance, recommended for medium-pressure applications and particle-containing media.
YG6X: Ultra-fine grain WC-6Co grade with superior surface flatness and wear resistance, ideal for high-precision sealing scenarios.
YN6 / WC-6Ni: Nickel-bound grade replacing cobalt with nickel, delivering good corrosion resistance for weak acid, salt water and marine pump sealing.
YN8 / WC-8Ni: Higher nickel content for better toughness and corrosion resistance, suitable for medium-corrosive fluids containing solid particles in chemical and marine applications.
Q3: What temperature range can WC seal rings withstand?
A: Standard WC-Co rings: -40℃ ~ 280℃ for long-term continuous service. For high-temperature oil or steam applications above 300℃, WC-Ni alloy with special surface treatment is recommended. Sudden extreme temperature shock should be avoided in all cases.
Q4: What surface flatness and roughness are required for WC sealing faces?
A: Surface roughness: Ra 0.02–0.2 μm after mirror grinding.
Flatness tolerance: ≤0.3 light band (inspected via helium light interference).
Insufficient flatness will cause liquid film breakdown, leakage and accelerated wear.
Q5: What are the standard dimensional tolerances for tungsten carbide seal rings?
A: Outer and inner diameter tolerance: ±0.005~±0.01 mm; perpendicularity and parallelism: ≤0.002 mm. Tighter custom tolerances are available for high-precision chemical pump applications.
Q6: Can custom-sized tungsten carbide seal rings be manufactured?
A: Yes, we manufacture custom tungsten carbide seal rings in both WC-Co and WC-Ni grades to match specific working conditions. As a professional custom carbide seal ring manufacturer, we support full customization of all dimensional and structural features, including outer diameter, inner diameter, wall thickness, step profiles, notches, anti-rotation slots and precision mirror lapping finishes. We can produce custom seal rings from your engineering drawings, physical samples or detailed technical sketches, with tight tolerances available for high-precision pump and valve applications.
Q7: What is your minimum order quantity?
A: Stock standard-size carbide seal rings: 1 piece MOQ.
Custom non-standard carbide sealing rings: MOQ ranges from 1 to 10 pieces, depending on size, wall thickness and complex structure.
Q8: What are the lead times for stock and customized orders?
A: Ready stock standard carbide seal rings: 2–3 working days delivery.
Custom ground finished carbide seal rings: 10–25 working days.
Please send us inquiries for quotations and free samples for testing:
