Stellite is a family of completely nonmagnetic and corrosionresistant cobalt alloys of various compositions that have been optimised for different uses. Alloy 6b uns r30016 ams 5894 description alloy 6b is a cobaltbased alloy with great wear, erosion and abrasion resistance. Haynes 25 l605 is a nonmagnetic cobalt based superalloy. Cocrw meets or exceeds ams 5894, pwa 1196, mcs 1012 and uns r30016. However, if used for chopping hard wood, the soft cobalt rolls over and the knife does not cut well.
The ps, hvof and lc stellite coated all had a similar nominal composition of balance co, 28% cr, 4. Ams 5759 requires minimum yield strength of 45,000 psi at room temperature. A comparative study for wear resistant of stellite 6 coatings. Stellite alloys are available in many different grades chemical compositions and several different processes or methods of manufacture. A metal source, llc stellite alloysstellite alloys. Rnicra rnicrb rnicrbc rnicrc ams 5388 a43983 superwear stellite 1 stellite 3 stellite 4 stellite 6 stellite 6h stellite 12 stellite 1016 stellite 21 l605 stellite 31 stellite f stellite 190 stellite 306 tribaloy 400 pwa 694 tribaloy 800 colmonoy 4 colmonoy 5 colmonoy 56 colmonoy 6 ribaloy 7 hastalloyc ni60 nucalloy 45 2.
Identification of the substancepreparation and of the companyundertaking product identifier product type welding rods, coated rod electrode, welding wire product name stellite 12 rodwireelectrodepart product code ksyc10031 type 1x1x1 mm, base. Average hardness values hv of solid solution and carbides 103 table 4 3. Some of the main advantages that stellite 6b cobalt chromium alloy provides includes. While ultimet alloy has been used successfully in the form of wrought products, its largest applications have involved weld overlays, made with solid wire consumables and arcwelding processes such as gmaw mig and gtaw tig. Hpa cobalt 6b is a wear resistant alloy used for stems, balls, rails and bushings. Stellite 6b is supplied in the solution treated condition to ams 5894 and its wear resistant. The interface area in laser cladding, microstructures and mechanical properties of which determine the structural integrity of the laserdeposited coating, consists of two distinctive zones. Stellite is a nonmagnetic alloy which contains a variety of different metal components with the main elements being cobalt and chromium.
Dav 04 davis, handbook of thermal spray technology, asm international, 2004. This alloy is very popular since it can retain hardness even at elevated temperature. Recommended for steel mill guide rolls, bearing bushings, tube forming rolls, rotary seal rings, can and barrel seaming rolls and wear pads. Oct 10, 20 several studies on laser cladding of stellite 6 show that dendritic structure is rich with cobalt in the form of. The dilution region is the region where melted substrate forms a mixture with coating material and possesses microstructure similar to the coating. Plasma transferred arc welding of stellite 6 alloy on. Clean copies of this booklet must be made available to candidates for papers 2 and 3 slp2, hlp2, slp3 and hlp3. Information provided by kennametal stellite vendors.
This gives them the ability to absorb stress to a higher absolute temperature. There are many types of stellite alloys composed of varying quantities of cobalt, chromium, molybdenum, tungsten, iron, nickel, boron, aluminum, carbon, manganese, phosphorus, silicon, titanium and sulfur in different proportions. A comparative study for wear resistant of stellite 6. Stellite 6b is a cobaltbased steel alloy that maintains a wide range of material benefits for industrial applications throughout the world. Deloro stellite stellite 6k knife steel composition. High wear resistance, but at low hardness its rather difficult to use. It is regarded as the industry standard for generalpurpose wear resistance applications. Like all stellite alloys, it has excellent resistance to oxidation but is not recommended for reducing acids. Corrosion materials is a global leader in specialty nickel alloys. Stellite alloys chemical composition, mechanical properties and.
Cobalt alloys cobalt alloys have higher melting points than nickel or iron alloys. With many yeas production experience, strict control stellite no. Carbon alloy powders similar to stellite, ultimet, mar m oerlikon. Cobalt alloy 6b stellite 6b is a cobaltbased, chromiumtungsten alloy used extensively in wear environments where its low friction coefficient minimises the risk of seizing and galling, even in applications where lubrication is not practical. Most stellite alloy compositions contain at least four to six of the listed elements.
Stellite 6k is excellent for some uses and is a poor performer for others. Chemical compositions wt%, co in balance of stellite alloys 60 table 32. The material itself has been around since the 1900s and was originally seen as a substitute for traditional metal cutlery which suffered from general wear and tear and was also prone to staining. Pdf the basics of stellites in machining perspective. Deloro stellite stellite 6k knife steel composition analysis. The difference in wear behaviour is more likely due to differences in the stellite coated composition and microstructure. Talonite and stellite are really just trade names for different cobalt alloys, ie. Certified mechanical properties covers stellite 6b in the form of sheet and plate up to 1 thick and round bar up to 3. The carbides present in the cocrwbased stellite alloys are of chromiumrich m7c3 type. The higher tungsten content of stellite alloy 4 gives improved high temperature properties and an increase in abrasive wear resistance over stellite alloy 6, but not as good as stellite alloy 12 or 3. Slightly harder than stellite 6b, but not a whole lot. Stellite alloy 3 is resistant to nitric acid over a range of concentrations at room temperature.
These different processes include casting, powder metal, hardfaced deposit, and wrought. It is a trademarked name of the deloro stellite company and was invented by elwood haynes 1 in the early 1900s as a substitute for cutlery that stained or that had to be constantly cleaned. Stood 3 can be manufactured to conform to military specification milc15345f, alloy 22, and milc24248 ships, composition iv. Selecting corrosion resisting alloys bulletin a5z ype 400 series cf8m cn7m durimet 20 monel m351 n7m chlorimet 2 on stellite 6 titanium conium 702conium 705. A wide variety of stellite 6 powder options are available to you, there are 235 suppliers who sells stellite 6 powder on, mainly located in asia. Hpa cobalt 6b cocrw uns r30016 aka haynes 6b, hs 6b, stellite 6b.
Stellite is the brand name of a hardfacing alloy which is widely used for valve seats, especially for valves subjected to abrasive service. Hightemperature hardness and wear resistance of stellite alloys. Stellite article about stellite by the free dictionary. Safety data sheet issuing date 20150206 revision date 20150306 revision number 2 1. Cobalt alloy 6b stellite 6b ams 5894 aircraft materials.
Average hardness values hv of solid solution and carbides 103 table 43. Composition weight % of elements of stellite grades. Summary of micro hardness test specifications 93 table 42. Kennametal stellite has the capability to provide components made of these materials to your exact specifications. For wrought grades stellite 6b and stellite 6k, the wrought or hot forging method of production leads to. Cobalt alloys are used primarily for wear applications and are particularly wellsuited for hardfacing applications. Cobalt alloys give superior hot corrosion resistance to gas turbine atmospheres. Written especially for design engineers, it presents an overview of a broad range of stainless steels both standard and proprietary their compositions, their properties, their fabrication, and their use. The chemical composition of stellite 6 is given in table 3.
The carbides present in the cocrwbased stellite alloys are of chromiumrich m 7 c 3 type. It is made by a company whose name is stellite coatings in the usa and deloro stellite in the rest of the world. Contents principal features 3 chemical composition 3 typical applications 4 corrosion in phosphoric acid 5. Evaluation of microstructure and mechanical properties at the. Stellite 6b cobalt alloy steel cobaltchromium alloy. Dendritic cobalt is cast cobalt 6b, stellite 6k is cobalt 6b with 0. Stellite 6 welding rods hai stellite 6 rod is cobalt base rod.
Stellite alloy is a range of cobaltchromium alloys designed for wear resistance. Microstructure and tribological properties of cobaltbased. Figure 2b shows xrd analysis of the coating, phase composition of the coating mainly contains co, cr 7 c 3, co 6 w 6 c, crco. Talonitestellitedendritic cobalt blade material knife. Hy s6stellit 6uns r3006ams 5387c2001 is the most widely used of the wear resistant cobaltbased alloys and exhibits good allround performance. This booklet cannot be used for paper 1 of the examination slp1 and hlp1, but the periodic table given in section 6 will be available as part of these examination papers. However, if used for chopping hard wood, the soft cobalt rolls over and the knife does not.
Out of print literary and book themed zipper pouch for book. Haynes 25 l605 maintains good oxidation resistance up to 1900 f. Stellite alloys corrosion resistance this alloy is considered inferior to stellite alloys 6 and 12 in most environments. Retains mediocre edge for a long time, no point in polishing the edge, better off with coarse edge. Quantities of carbides in stellite alloys 87 table 41. They are resistant to wear, gall ing and corrosion and retain these properties at high. Co, while dark coloured structures are carbides in the form of m 7 c 3 24, 25, m 23 c 6 6, 24 and co 6 w 6 c 6, 24, where m represents cr, co and w. Hightemperature hardness and wear resistance of stellite. Stellite alloys chemical composition, mechanical properties.
The top surface of the clad has been machined separately and then chemical composition of stellite 6 was measured by optical emission spectrometer oes. Stellite alloys are a group of cobaltchromium superalloys consisting of complex carbides. The chemical and phase composition, morphology and microstructure of the coatings were assessed using auger electron spectroscopy, xray diffraction. Hastelloy g30 alloy a nickelbase alloy with superior corrosion resistance to commercial phosphoric, sulfuric, nitrichydrochloric, nitrichydrofluoric acids and other complex environments containing highly oxidizing acids. The chromiumrich carbides cr 7 c 3 formed during esd process have stable facecentercubic structure, it makes a contribution to high macrohardness and good abrasive wear resistance of. Chemical compositions wt%, co in balance of stellite alloys 60 table 3 2. The properties listed in this booklet are typical or average values based on laboratory tests conducted by the manufacturer. For more information, contact us about our inhouse machine shop capabilities. Stellitetm 6b mill annealed 8,2 c38 0,471 x 103 stellitetm 6k mill annealed,3 c46 0,946 x 103 stellitetm 25 mill annealed 1hr. Adhesive wear is similar to stellite alloy 6, but resistance improves as the load increases. The alloy currently most suited for cutting tools, for example, is stellite 100, because this alloy is quite hard, maintains a good cutting edge at high temperature, and resists hardening and annealing. The cocrw system alloy retains its hardness at elevated temperatures and is especially effective for wear applications at high temperatures or in a corrosive environment, and are widely used as a wear, corrosion, and heatresistant material 43. The wear resistance of alloy 6b is due to the chemical composition and is not a product of heat treatment or other hardening mechanisms.
Stellite the general name for a group of cobaltbase hard facing alloys containing chromium, tungsten, silicon, and other. Stellite 6 is a cobase wear resistant alloy containing 1% c, 27% cr, 4. Kennametal stellites cobalt base alloys are available as cobalt rods, cobalt electrodes, cobalt wire and cobalt powder. Content is relevant with a little digression from the main topic which does not look evidently off topic. Evaluation of microstructure and mechanical properties at. Stellite 6kdeloro stellite not a steel, cobalt based alloy with very high chromium content. Stellite cobalt base alloys consist of complex carbides in an alloy matrix. It may also contain tungsten or molybdenum and a small but important amount ofcarbon. Research article effect of gtaw welding parameters. Stellitetm 6b mill annealed 8,2 c38 0,471 x 10 3 stellitetm 6k mill annealed, 3 c46 0.
Check availability with our sales department by submitting your inquiry below to see if a metal source, llc can provide your stellite alloy metal requirement. Stellite 6b hpa cobalt 6b uns r30016 high performance. This factor is the primary reason cobalt alloys are used. The trademark owners of stellite claim that stellite 6 is the most widely used of their range of stellite alloys, offering a proven industry standard for generalpurpose wear resistance, and high mechanical and chemical perfromance in hostile environments.
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