Oil & Gas Stellite Cobalt Alloy Valve Seat

This product is a high-performance Stellite Cobalt Alloy Valve Seat specifically engineered for severe service environments, such as those found in the Oil & Gas industry. Utilizing the unique properties of Cobalt-Chromium-Tungsten alloys, this seat provides exceptional durability against wear, high temperatures, and corrosion.

⭐ Key Material and Performance Features

The seat is made from a Cobalt-based alloy characterized by complex carbides dispersed within an alloy matrix . This microstructure is responsible for the material’s superior performance:

Resistance: Highly resistant to wear, galling, and corrosion.
Thermal Stability: Retains these properties even at high temperatures.
Wear Mechanism: Exceptional wear resistance is primarily due to the hard carbide phase dispersed in the $\text{CoCr}$ matrix.

Property	Value / Composition
Material Base	Cobalt (Co)
Nominal Composition	$\text{Cr}: 29\text{-}33\%$ , $\text{W}: 11\text{-}14\%$ $\text{C}: 2.0\text{-}2.7\%$
Hardness	$51\text{-}55\,\text{HRC}$
Density	$\text{8.55}\,\text{g}/\text{cm}^3$
Melting Range	$\text{1200} \text{-} \text{1400}^\circ\text{C}$
Manufacturing Process	Powder Metallurgy

📏 Manufacturing and Quality

The manufacturing process ensures superior quality and dimensional control:

Manufacturing Method: Powder Metallurgy, which allows for precise material control and near-net-shape production.
Dimensional Tolerance: Achieves a precise tolerance of $\pm 0.025$ (units not specified, but typically $\text{mm}$ or inches) for reliable fitment.
Surface Finish: Very smooth surface roughness of $5\,\text{RA}$ maximum.

🏭 Typical Applications

Due to its high $\text{HRC}$ hardness and excellent heat-corrosion resistance, this material is used in critical, high-wear components across multiple industries:

Valves: Valve seat inserts, valve seat rings, valve cages, engine valves, and high-temperature/pressure valve components.
Pumps & Machinery: Pump parts, pistons, bushings, nozzles, bearings, and sleeves.
Metallurgy: Still mill guide rolls, wear plates, and other high-wear parts.

Custom sizes and dimensions are available to meet specific industrial requirements.