Zhuzhou Sanxin Cemented Carbide Manufacturing Co., Ltd
| Payment Terms | T/T,Western Union,L/C |
| Delivery Time | 5-30days |
| Surfacefinish | Polished or matte |
| Drawing | Welcome Clients' Drawings |
| Density | 14.5-15.1 g/cm³ |
| Sizes Available | Customizable |
| Elastic Modulus | 530 - 700 GPa |
| Wear Resistance | Excellent |
| Surface Finish | Ra 0.2 |
| Business Type | Manufacturer |
| Customization | Available upon request |
| Innerdiameterrange | 3mm - 90mm |
| Chemical Resistance | Resistant to most acids and alkalis |
| Application | used for water pump,Oil Field,oil pump and other pump,anti-corrosion,guide bush |
| Features | Excellent wear resistant and high hardness,Superior wear-resistance and impact toughness,Wear-resisting,abrasive resistance,corrosion resistance |
| Brand Name | Sanxin |
| Model Number | SX1307 |
| Certification | ISO |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T,Western Union,L/C | Delivery Time | 5-30days |
| Surfacefinish | Polished or matte | Drawing | Welcome Clients' Drawings |
| Density | 14.5-15.1 g/cm³ | Sizes Available | Customizable |
| Elastic Modulus | 530 - 700 GPa | Wear Resistance | Excellent |
| Surface Finish | Ra 0.2 | Business Type | Manufacturer |
| Customization | Available upon request | Innerdiameterrange | 3mm - 90mm |
| Chemical Resistance | Resistant to most acids and alkalis | Application | used for water pump,Oil Field,oil pump and other pump,anti-corrosion,guide bush |
| Features | Excellent wear resistant and high hardness,Superior wear-resistance and impact toughness,Wear-resisting,abrasive resistance,corrosion resistance | Brand Name | Sanxin |
| Model Number | SX1307 | Certification | ISO |
| Place of Origin | China |
Vacuum pump seals face some of the harshest conditions in industrial machinery—chemical vapors that eat through conventional materials, abrasive particles that accelerate wear, and stringent cleanliness requirements that rule out standard lubricants.
Most tungsten carbide seals use cobalt (Co) binder, which provides excellent wear resistance but suffers from two fundamental limitations: high magnetic permeability that interferes with sensitive instruments and poor corrosion resistance in aggressive chemical environments.
Our WC-Ni Non-Magnetic Alloy Vacuum Pump Seals are engineered to overcome both. By replacing cobalt with nickel as the binder phase, these seals deliver magnetic neutrality and superior chemical resistance, while maintaining the exceptional hardness and wear resistance that make tungsten carbide the industry standard for mechanical seal faces.
The seal faces in a vacuum pump are the primary barrier between the evacuated chamber and the external environment. They must prevent gas and liquid leakage (often down to ≤10⁻⁶ Pa level) while withstanding friction, chemical attack, and thermal stress.
| Property | WC-Ni Seal | WC-Co Seal | SiC Seal |
|---|---|---|---|
| Magnetic Permeability | < 1.002 | 1.5 - 2.0 | < 1.001 |
| Hardness (HRA) | 89 - 92 | 89 - 92 | 88 - 92 |
| Corrosion Resistance | Excellent | Moderate | Excellent |
| Wear Life | 10-50x carbon | Exceptional | High |
| Maximum Temperature | 800 °C | 800°C | 1300°C |
| Binder System | Nickel (Ni) | Cobalt (Co) | N/A (ceramic) |
Unlike cobalt-bonded grades that corrode in acidic environments, WC-Ni seals offer excellent resistance to chemical attack:
By utilizing nickel as the binder, the seal material is completely free of ferromagnetic elements:
WC-Ni hardness consistently reaches 89-92 HRA (approx. 1,600-1,900 HV), with density of 14.8-15.0 g/cm³:
WC-Ni carbides are recommended for mechanical seals operating under high pressure, high speed, high temperature, corrosive media, and media containing solid particles.
Industry trend: increasing use of aggressive chemistries in semiconductor etch chambers and pharmaceutical reactors. WC-Ni seals resist chemical attack where cobalt alternatives fail.
Industry trend: growth in dry pumping systems for semiconductor fabrication. Non-magnetic WC-Ni seals maintain system purity while preventing magnetic contamination.
Industry trend: advanced vacuum furnaces and thermal processing extend operating temperatures. WC-Ni seals maintain mechanical properties at elevated temperatures.
| Grade | Ni Binder (wt%) | Hardness (HRA) | Density (g/cm³) | Best Applications |
|---|---|---|---|---|
| YN6 | 6% | 89.5 | 14.7 | General-purpose chemical resistance |
| YN6A | 6% | 91.0 | 14.8 | High hardness, general chemical vapor service |
| YN8 | 8% | 88.5 | 14.6 | Higher toughness, impact resistance |
| YN13 | 10-13% | 87.0-88.0 | 14.2-14.4 | Maximum corrosion resistance |
| WC-Ni-Cr | Proprietary | 89.0-90.0 | 14.4-14.6 | Enhanced corrosion resistance for aggressive acids |
| WC-Ni Fine Grain | 6-8% | 91.0-92.0 | 14.8-14.9 | Superior wear resistance for high-speed pumps |
Contact us for a technical consultation—send your pump specifications or seal drawing for a prompt quote.
Company Details
Business Type:
Manufacturer,Importer,Exporter,Seller,Other
Year Established:
2003
Total Annual:
8000000-10000000
Employee Number:
150~180
Ecer Certification：
Verified Supplier
Zhuzhou Sanxin Cemented Carbide Manufacturing Co.,Ltd is located in Zhuzhou, Hunan Province, which is known as the “Hometown of Cemented Carbide”. It is a national high-tech enterprise that has passed ISO9001:2015 international quality certification system, specializing in manufacturing,... Zhuzhou Sanxin Cemented Carbide Manufacturing Co.,Ltd is located in Zhuzhou, Hunan Province, which is known as the “Hometown of Cemented Carbide”. It is a national high-tech enterprise that has passed ISO9001:2015 international quality certification system, specializing in manufacturing,...
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