Products Description
Cobalt Chrome Alloy Valve Seat is a component used in various types of engines and machinery, including internal combustion engines, where it forms a critical part of the valve train system. The valve seat is the area where the valve comes to rest when it is closed, sealing the combustion chamber or intake/exhaust ports.When the valve closes, the valve seat serves as the sealing surface for the valve, ensuring the airtightness of the combustion chamber or intake/exhaust ports. Cobalt-chromium alloy boasts high strength, heat resistance, and excellent wear resistance, enabling it to maintain stable performance under extreme operating conditions and prolonging its service life. These superior material properties allow the valve seat to maintain a tight seal even in high-temperature, high-pressure combustion environments, effectively preventing gas leakage and ensuring the efficient operation and stable performance of the engine.
Cobalt Chrome Alloy Valve Seat, known for their excellent mechanical properties, are chosen for valve seats in high-performance applications due to the following features:
High Strength:
Cobalt Chrome Alloy Valve Seats demonstrate advanced yield and tensile strength, enabling them to withstand the intense pressures within engine combustion chambers.
Wear Resistance:
These valve seats exhibit exceptional wear resistance, a critical feature for components that continuously interact with valve faces under high temperatures and rapid rotational speeds.
Corrosion Resistance:
They also provide strong corrosion resistance, ensuring long-term durability even when exposed to harsh combustion byproducts.
High-Temperature Resistance:
Cobalt Chrome Alloy Valve Seats retain their mechanical properties even at extreme temperatures (exceeding 1000°C / 1832°F), making them ideal for high-performance engines.
Fatigue Resistance:
Their ability to endure repetitive stress without failure makes them highly reliable, with cobalt chrome alloys offering excellent fatigue resistance.
Applications of Cobalt Chrome Alloy Valve Seats:
Automotive
Cobalt Chrome alloy valve seats are widely used in high-performance vehicles, including motorcycles, supercars, and racing cars. Their exceptional heat and wear resistance enable them to withstand extreme RPMs and temperatures, even in turbocharged or supercharged engines.
Aerospace
In aircraft engines, Cobalt Chrome alloy valve seats ensure maximum reliability and performance. Their durability contributes to extended engine lifespan and consistent operation under demanding conditions.
Marine
Marine engines benefit from the corrosion-resistant properties of Cobalt Chrome alloy valve seats, which prevent degradation even when exposed to saltwater and other corrosive elements.
Industrial
These valve seats are also employed in industrial engines, compressors, and heavy machinery operating in harsh environments. Their robust design enhances long-term efficiency and reduces maintenance requirements.
Specification of Cobalt Chrome Alloy Valve Seat
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Material: |
Cobalt alloy (Same as Stellite) –Grade 3.6.12 |
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Process: |
Powder Metallurgy, it is short for PM and investment casting |
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Hardness: |
38-55 HRC |
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Density: |
8.4 g/cm³ |
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Size: |
Diameter 8-500mm, length 600mm |
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Properties: |
Wear and corrosion resistance, high temperature resistance |
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Application: |
as a seal ring |
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Instructions: |
Drawing made upon customer's request |
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Usage: |
sealing parts |
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Tolerance control: |
turning or grinding surface, tolerance upon drawing |
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Production lead time |
Samples 10 days, normal order 15-30 days |
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Package: |
carton or wooden case, pallet for export |
FAQ:
What is the MOQ?
A: Depends on quantity, generally, no MOQ limit.
How to pay for it?
A: A bank transfer (T/T) will be acceptable.
What is the delivery time?
A: around 7-20 days which depends on the quantity and production.
What is the package?
A: cartoon case or plywood case.
What is the lead time?
A: from order placed to cargo receiving will take around 10-25 days.
What is the delivery method?
A: Generally, we send cargo by UPS, DHL or FedEx. Also, we can send by sea to seaport or by air to the closest airport.
What is a cobalt-chromium alloy valve seat?
A cobalt-chromium alloy valve seat is a high-performance engine component used in valve train systems, particularly in internal combustion engines. It provides a durable sealing surface for valves, ensuring efficient combustion and preventing gas leaks.
Why is cobalt-chromium alloy used for valve seats?
Cobalt-chromium alloy is chosen for its:
High strength – Resists deformation under pressure.
Heat resistance – Withstands extreme engine temperatures.
Wear resistance – Reduces erosion from valve impacts, extending lifespan.
Corrosion resistance – Performs well in harsh combustion environments.
Where are these valve seats commonly used?
They are primarily used in:
Internal combustion engines (gasoline, diesel, racing engines).
High-performance and heavy-duty engines (aviation, marine, industrial machinery).
Applications requiring durability under extreme conditions.
How do cobalt-chromium valve seats improve engine performance?
Better sealing – Reduces gas leakage, improving combustion efficiency.
Longer lifespan – Minimizes wear, reducing maintenance frequency.
Higher reliability – Maintains performance in high-stress environments.
Are there different types of cobalt-chromium valve seats?
Yes, variations may include:
Different alloy compositions (adjusting cobalt, chromium, tungsten, or carbon content).
Coatings (e.g., stellite overlay for extra wear resistance).
Custom designs for specific engines (racing, turbocharged, or large diesel engines).
How do these valve seats compare to traditional materials?
Compared to cast iron or steel valve seats, cobalt-chromium alloys offer:
Superior heat and wear resistance.
Longer service life, especially in high-performance engines.
Better performance in turbocharged or high-compression engines.
Can cobalt-chromium valve seats be repaired or reconditioned?
Yes, they can often be re-machined or lapped to restore sealing surfaces, depending on wear levels. However, severe damage may require replacement.
Are there any downsides to using cobalt-chromium valve seats?
Higher cost than conventional materials (justified by longer lifespan).
Harder material may require compatible valve materials to avoid excessive wear.
How should these valve seats be maintained?
Regular engine inspections for wear or leakage.
Proper valve lash adjustment to prevent excessive impact.
Using high-quality lubricants to minimize friction.
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