What is a Stellite valves?
Stellite is a cobalt alloy used primarily for hard facing of valve internals, as well as valve bodies in some cases. 22Chromeuim duplex or 25Chromeium superduplex body plug valves are commonly used in the offshore industry.
What is Stellite made of?
The Stellite alloys are mostly cobalt based with additions of Cr, C, W, and/or Mo. They are resistant to cavitation, corrosion, erosion, abrasion, and galling. The lower carbon alloys are generally recommended for cavitation, sliding wear, or moderate galling.
Why are Stellite valve used?
Stellite was a major improvement in the production of poppet valves and valve seats for the valves, particularly exhaust valves, of internal combustion engines. By reducing their erosion from hot gases, the interval between maintenance and re-grinding of their seats was dramatically lengthened.
What is the purpose of Stellite?
Some of the major applications of stellite include the following: Saw teeth, hardfacing, and acid-resistant machine parts. Poppet valves, valve seats and exhaust valves of internal combustion engine. M2HB machine gun and machine gun barrels.
What are the different grades of Stellite?
There are several types and variations of stellite superalloys containing varying levels of: titanium, silicon, sulfur, phosphorus, molybdenum, manganese, chromium, carbon, boron, aluminium, iron, nickel and cobalt in different quantities. Most of the stellite alloys contain four to six of these elements.
Why are Stellite valves used?
The main benefits of Stellite are the wear resistance, strength of the material, and the ability to work under extreme temperatures.
What are Stellite™ alloys?
The cobalt-based Stellite™ Alloys are the most well-known and successful alloys in the world, with the best “all-round” properties. They combine excellent mechanical wear resistance, especially at high temperatures, with very good corrosion resistance. The Stellite alloys are mostly cobalt based with additions of Cr, C, W, and/or Mo.
What is Stellite 6?
Stellite 6 is our most popular alloy as it provides a good balance of all of these properties. The Stellite alloys retain their properties at high temperatures where they also have excellent oxidation resistance. They are typically used in the temperature range 315 – 600° C (600 – 1112° F).
Why Kennametal Stellite™?
No matter the industry, we offer the flexibility to supply components in any volume and either as-cast or finish-machined to meet exacting tolerances. Kennametal Stellite™ manufactures consumable weld overlay materials as cast rod, cored wire, electrodes, and powder, with a special focus on nickel and cobalt base materials.
What is the temperature resistance of Stellite?
The Stellite alloys retain their properties at high temperatures where they also have excellent oxidation resistance. They are typically used in the temperature range 315 – 600° C (600 – 1112° F).