STELLITE PRODUCTS | STELLITE 6, STELLITE 12, OTHER COBALT ALLOYS
Tesco Steel & Engineering is a leading manufacturer and supplier of Stellite® cobalt alloy products, engineered to perform in extreme wear, heat, corrosion, and erosion environments. With a strong focus on metallurgical precision and application-specific performance, we produce high-quality Stellite components that help reduce downtime, extend service life, and improve operational reliability. Our product range covers all major Stellite grades, including Stellite 1, 3, 4, 5, 6, 6B, 6K, 7, 8, 10, 11, 12, 15, 20, 21, 25, and 31, meeting demanding international standards for critical industrial applications.
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We offer comprehensive manufacturing capabilities under one roof, enabling full control over quality, consistency, and lead time. Our processes include Powder Metallurgy, Investment Casting, Rolling, Vacuum Casting, Centrifugal Casting, Sand Casting, Forging, Precision Machining, Hardfacing & Cladding, and Final Finishing. This wide manufacturing portfolio allows us to supply near-net-shape components as well as fully finished parts, while also supporting custom alloy development and grade selection based on operating temperature, wear mode, pressure, and corrosion resistance requirements.
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Tesco Steel & Engineering serves a diverse range of industries where performance failure is not an option. Our Stellite products are widely used in Oil & Gas, Petrochemical, Power Generation, Steel Industry, Wood Processing, Temperature Measurement, Insulation, Food Processing, Copper & Aluminium Extrusion, Paper & Pulp, Plastic Extrusion, and other heavy industrial sectors. Whether for valves, seats, bushings, wear plates, cutting tools, or high-temperature components, our Stellite solutions are designed to deliver long-term value, reliability, and cost efficiency in the most severe service conditions.
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CHEMICAL COMPOSITION OF STELLITE GRADES
Grade | C | Mn | Si | Cr | Ni | Mo | W | Co | Fe | Density g/cm3 | Hardness HRC |
|---|---|---|---|---|---|---|---|---|---|---|---|
ST 1 | 2.0-2.8 | 1.0 max | 2.0 max | 29.0-33.0 | 3.0 max | 1.0 max | 11.0-14.0 | Bal. | 3.0 max | 8.55 | 51-55 |
ST 3 | 2.0-2.7 | 1.0 max | 1.0 max | 29.0-33.0 | 3.0 max | 1.0 max | 11.0-14.0 | Bal. | 3.0 max | 8.55 | 51-55 |
ST 4 | 0.8-2.7 | 1.0 max | 1.5 max | 28.0-32.0 | 3.0 max | 1.5 max | 12.5-15.5 | Bal. | 3.0 max | 8.65 | 40-54 |
ST 6 | 0.9-1.4 | 1.0 max | 1.5 max | 27.0-31.0 | 3.0 max | 1.50 max | 3.5-5.5 | Bal. | 3.0 max | 8.30 | 38-44 |
ST 6B | 0.9-1.4 | 0.5-2.0 | 0.2-2.0 | 28.0-32.0 | 3.0 max | 1.50 max | 3.5-5.5 | Bal. | 3.0 max | 8.30 | 33-43 |
ST 6K | 1.4-1.9 | 1.0 max | 1.5 max | 27.0-31.0 | 3.0 max | 1.50 max | 3.5-5.5 | Bal. | 3.0 max | 8.30 | 43-47 |
ST 12 | 1.1-1.7 | 1.0 max | 1.0 max | 28.0-32.0 | 3.0 max | - | 7.0-9.5 | Bal. | 3.0 max | 8.40 | 44-49 |
ST 19 | 1.5-2.1 | 1.0 max | 1.0 max | 29.5-32.5 | 3.0 max | - | 9.5-11.5 | Bal. | 3.0 max | 8.45 | 46-51 |
ST 20 | 2.2-3.0 | - | 2.0 max | 30.0-34.0 | 3.0 max | 1.0 max | 14.0-19.0 | Bal. | 3.0 max | 8.70 | 56-60 |
ST 21 | 0.2-0.3 | 1.0-2.0 | 1.0 max | 26.0-28.0 | 2.5 max | 5.0-6.0 | - | Bal. | 2.5 max | 8.20 | 27-40 |
ST 25 | 0.1 max | 1.5 max | 0.5 max | 19.0-21.0 | 9.0-11.0 | - | 14.0-16.0 | Bal. | 3.0 max | 8.30 | 20-45 |
ST 31 | 0.45-0.55 | 1.0 max | 1.0 max | 24.5-26.5 | 9.5-11.5 | 0.5 max | 7.0-8.0 | Bal. | 2.0 max | 8.60 | 30-35 |
ST 694 | 0.8-1.2 | - | 0.8-1.2 | 26.5-29.5 | 4.0-6.0 | - | 18.0-20.0 | Bal. | 3.0 max | 8.70 | 47-51 |
T 400 | 0.1 max | - | 2.5-2.7 | 7.5-9.5 | - | 27.5-29.5 | - | Bal. | - | 8.60 | 48-58 |
T 800 | 0.1 max | - | 3.5 max | 16.5-18.5 | - | 27.5-29.5 | - | Bal. | - | 8.20 | 54-62 |
ASTM F75 | 0.35 max | 1.0 max | - | 27.0-30.0 | - | 5.0-7.0 | - | Bal. | - | 8.1-8.4 | 26-30 |
TP80 | 1.5-2.2 | 1.0 max | 1.0 max | 26.0-31.0 | 4.0-8.0 | 1.0-2.0 | 4.50-7.00 | Bal. | Nb 4.0-6.0, Cu 0.5-2.0 | 8.35 | 42-51 |
EQUIVALENT GRADES OF STELLITE
Grade | Equivalent |
|---|---|
Cobalt F75 | UNS R30075 |
Tribaloy T 400 | UNS R30400 |
Stellite 694 | B50TF55 |
Stellite 31 | UNS R30031, AMS 5382, ASTM A732 Gr.31 |
Stellite 25 | UNS R30605 |
Stellite 21 | UNS R30021, UNS W73041, UNS W73021, AMS 5385, AMS 5819 |
Stellite 12 | UNS R30012, UNS W73012, UNS W73042 |
Stellite 6 | UNS R30006, UNS R30106, UNS W73006, UNS W73036, AMS 5387, AMS 5373, AMS 5788, AMS 7239 |
Stellite 4 | UNS R30404 |
Stellite 3 | UNS R30001, UNS R30103 |
Stellite 1 | UNS R30001, UNS W73031, UNS W73001 |
STELLITE PRODUCTION PROCESSES
A dependable production process is crucial to product performance, TESCO offers products manufactured using various processes such as powder metallurgy, casting, forging, rolling, surface coating and hard facing, tailored to meet the specific needs of our customers' products and applications. This not only meets usage requirements but also maximizes cost savings.
INDUSTRIES SERVED: OIL & GAS INDUSTRY
In directional drilling, cobalt alloy components like MWD/LWD sensor housings ensure data accuracy in high temperature formations while resisting sour gas degradation. For solids control, cobalt alloy coated decanter centrifuge augers (HRC 55+) withstand abrasive drilling fluids, tripling service life and slashing maintanance by 40%. API pump seal rings made from cobalt alloys prevent sand-induced erosion, maintaining sealing integrity under thermal cycling.
1. STELLITE CAGE / COBALT ALLOY CAGE
2. STELLITE FLOW DIVERTERS / COBALT ALLOY FLOW DIVERTERS
3. STELLITE NOZZLE SLEEVES / COBALT ALLOY NOZZLE SLEEVES
4. STELLITE TURBINE ROTORS / COBALT ALLOY TURBINE ROTORS
5. STELLITE STATOR / COBALT ALLOY STATOR
6. STELLITE MOUNTING PLATES / COBALT ALLOY MOUNTING PLATES
7. STELLITE DEFLECTOR / COBALT ALLOY DEFLECTOR
8. STELLITE TURBINE STATORS / COBALT ALLOY TURBINE STATORS
INDUSTRIES SERVED: PETROCHEMICAL INDUSTRY
Equipment and components in the petrochemical industry operate in extremely harsh environments, often exposed to highly corrosive fluids or solid-liquid mixtures. These conditions can significantly reduce operational efficiency and equipment lifespan, leading to increased frequency and duration of downtime for maintenance. Cobalt-based alloys, with their exceptional resistance, corrosion resistance and high-temperature performance, provide an effective solution to address issues such as corrosion, wear and thermal degradation, helping customers minimize downtime and enhance operational reliability.
1. STELLITE FEED NOZZLE / COBALT ALLOY FEED NOZZLE
2. STELLITE BUSHING / COBALT ALLOY BUSHING
3. STELLITE NOZZLE SLEEVES / COBALT ALLOY NOZZLE SLEEVES
4. STELLITE DENOX NOZZLE / COBALT ALLOY DENOX NOZZLE
5. STELLITE SPRAY NOZZLE / COBALT ALLOY SPRAY NOZZLE
6. STELLITE DIFFUSER / COBALT ALLOY DIFFUSER
7. STELLITE SLEEVE / COBALT ALLOY SLEEVE
8. STELLITE BLOW HEAD / COBALT ALLOY BLOW HEAD
INDUSTRIES SERVED: POWER GENERATION
Cobalt-based alloys are widely used in the power generation industry. We specialize in supplying products for industrial gas turbines, including blades, vanes and structural combustor parts. In both conventional and nuclear power plants, steam turbines utilize various control valves within the hot steam path. These components are subjected to extreme conditions, including high temperatures, corrosion and erosion, which can significantly impact their performance and lifespan.
1. STELLITE BUSHING / COBALT ALLOY BUSHING
2. STELLITE EROSION SHIELD / COBALT ALLOY EROSION SHIELD
3. STELLITE SLEEVE / COBALT ALLOY SLEEVE
4. STELLITE BEARING / COBALT ALLOY BEARING
5. STELLITE TP SEAL / COBALT ALLOY TP SEAL
INDUSTRIES SERVED: STEEL INDUSTRY
Galvanizing production lines are widely used in the production of steel plates in steel mills, especially steel plates supplied to automobiles and household appliances. Due to its special production environment, the galvanizing production line has very high requirements for some accessories immersed in the zinc solution, which requires high temperature resistance, corrosion ressistance and wear resistance at the same time. The typical products are sinking roller bushing, stabilizer sleeve, scraper and propeller, different dimensions are available upon requests.
1. STELLITE SCRAPER / COBALT ALLOY SCRAPER
2. STELLITE PROPELLER / COBALT ALLOY PROPELLER
3. STELLITE SEGMENT / COBALT ALLOY SEGMENT
4. STELLITE STABILIZED ROLLER SLEEVE / COBALT ALLOY STABILIZED ROLLER SLEEVE
5. STELLITE STABILIZED ROLLER SLEEVE / COBALT ALLOY STABILIZED ROLLER SLEEVE
6. STELLITE SINK ROLL SLEEVE / COBALT ALLOY SINK ROLL SLEEVE
7. STELLITE STOPPER / COBALT ALLOY STOPPER
INDUSTRIES SERVED: WOOD PROCESSING
TESCO manufacture different sizes welding rods and sintered tips of cobaly alloy, compatible with all kinds of tippers such as Wright, Armstrong and Iseli. The service life of the band saw and circular saw blades can be considerably improved by covering the tooth tips with cobalt alloy.
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It will enhance the blades performance and its lifespan, especially cutting the hard woods such as some exotic wood species of Africa and Southeast Asia, but in recent years it has also proved successful for machining soft wood such as fir and spruce, some kind of wet woods and frozen woods, oiled timber, red cedar and birch.
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We maintain a full inventory of all sizes to match your requirement. Beyong preformed cobalt alloy, we also can make according to your special design and rod-length materials. Whatever your saw tipping needs, we've got you covered.
1. STELLITE SAW TIPS (RECTANGLE) / COBALT ALLOY SAW TIPS (RECTANGLE)
2. STELLITE SAW TIPS (TRIANGLE) / COBALT ALLOY SAW TIPS (TRIANGLE)
3. STELLITE SAW TIPS (EUROPEAN STYLE) / COBALT ALLOY SAW TIPS (EUROPEAN STYLE)
4. STELLITE SAW TIPS (PROFILED) / COBALT ALLOY SAW TIPS (PROFILED)
5. STELLITE SAW TIPS (ROUNDED) / COBALT ALLOY SAW TIPS (ROUNDED)
6. STELLITE WELDING RODS / COBALT ALLOY WELDING RODS
7. STELLITE DENSE WELDING RODS / COBALT ALLOY DENSE WELDING RODS
INDUSTRIES SERVED: TEMPERATURE MEASUREMENT INDUSTRY
Cobalt alloy maintain their strength and stability even at extreme temperatures, making them ideal for high-temperature environments. Cobalt-based alloy thermocouple protection tubes are widely used in temperature measurement applications in power plants and cement plants. These environments demand exceptional high-temperature wear resistance, as well as the ability to withstand erosion and corrosion from various particulates. To optimize cost-efficiency and extend service life, we typically offer solutions that combine standard metal materials with cobalt-based alloys through welding.
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Another kind of metal ceramic tube are widely used to test the temperature when melting nickel and cobalt alloy. Both of them can help customers control costs, reduce replacement frequency and enhance overall operational reliability.
1. STELLITE THERMOWELL TUBE / COBALT ALLOY THERMOWELL TUBE
2. STELLITE PROTECTIVE TUBE / COBALT ALLOY PROTECTIVE TUBE
INDUSTRIES SERVED: INSULATION INDUSTRY
Cobalt alloy spinner discs for glass wool production is a typical application, spinner discs are one of the key components for the production of glass wool, the using temperature is around 1000°C. It help to expand the lifespan due to its excellent high temperature resistance and wear resistance. There will be 10000 to 50000 holes in each spinner depending on the dimensions.
TESCO supplies 6000-10000 pieces spinners worldwide every year.
1. STELLITE SPINNER / COBALT ALLOY SPINNER
INDUSTRIES SERVED: FOOD PROCESSING
We offer OEM components for homogenizer equipment in the food, cosmetics and drugs processing. To meet the wide variation in wear requirements across these industries, TESCO offers full series cobalt alloy. Our part offer significantly extended service life and process reliability in the most abrasive and corrosive homogenizer and feed extrusion processes.
1. STELLITE VALVE PILOT / COBALT ALLOY VALVE PILOT
2. STELLITE VALVE CORE / COBALT ALLOY VALVE CORE
3. STELLITE VALVE PLUNGER / COBALT ALLOY VALVE PLUNGER
4. STELLITE BALL / COBALT ALLOY BALL
5. STELLITE VALVE CAGE / COBALT ALLOY VALVE CAGE
6. STELLITE VALVE SEAT / COBALT ALLOY VALVE SEAT
7. STELLITE SEAT RING / COBALT ALLOY SEAT RING
INDUSTRIES SERVED: Copper and Aluminum Extruding
Copper extrution dies need to work at 800°C for a long time, the wearing in high temperature is serious. So it requests the dies with very good hot hardness to reduce the downtime and increase its lifetime, widely used on profile copper or aluminum flat bars and rods extrusion. The surface will be shining and not easy to crack during the extrusion process.
1. STELLITE EXTRUSION DIE / COBALT ALLOY EXTRUSION DIE
2. STELLITE EXTRUDER / COBALT ALLOY EXTRUDER
3. STELLITE FEED PLATE / COBALT ALLOY FEED PLATE
INDUSTRIES SERVED: Paper & Pulp Industry
For many years, TESCO has been providing cost-effective, wear-resistant solutions tailored to the unique demands of the Pulp and Paper Industry. In the paper manufacturing process, equipment and components are often exposed to slurry corrosion, erosion and wear, placing higher demands on material performance. Cobalt-based alloys, with their exceptional resistance to fluid corrosion, erosion and wear, provide enhanced protection for critical components in pulp making equipment. This helps reduce downtime for maintenance and repairs, ultimately improving production efficiency.
1. STELLITE AXLE SLEEVE / COBALT ALLOY AXLE SLEEVE
2. STELLITE VALVE BODY / COBALT ALLOY VALVE BODY
3. STELLITE DISCHARGE PORT LINER / COBALT ALLOY DISCHARGE PORT LINER
4. STELLITE BUSHING / COBALT ALLOY BUSHING
5. STELLITE WEARING STRIP / COBALT ALLOY WEARING STRIP
6. STELLITE LINER BUSH / COBALT ALLOY LINER BUSH
7. STELLITE SLEEVE / COBALT ALLOY SLEEVE
8. STELLITE BEARING / COBALT ALLOY BEARING
INDUSTRIES SERVED: EXTRUSION PLASTICS
In recent years, cobalt-based alloys have been widely adopted in plastic extrusion processes, particularly for critical components such as screw barrels and other essential parts within the screw system. We provide customized barrel solutions and replacement programs for a range of OEM extruders, ensuring optimal performance and durability.
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We also manufacture a full range of pelletizing knives for extruders. These knives are produced either based on our proprietary designs or customized to meet specific customer requirements. All knives are vacuum-brazed, ensuring tight tolerances and exceptional quality. Dimensional accuracy is meticulously verified during production and thoroughly documented in the final inspection to guarantee precision and reliability.
1. STELLITE SCREW PUMP / COBALT ALLOY SCREW PUMP
2. STELLITE PIPE / COBALT ALLOY PIPE
3. STELLITE PELLETIZER KNIFE / COBALT ALLOY PELLETIZER KNIFE
4. STELLITE STEM / COBALT ALLOY STEM
5. STELLITE TIP / COBALT ALLOY TIP
6. STELLITE SCREW / COBALT ALLOY SCREW
7. STELLITE RODS / COBALT ALLOY RODS
INDUSTRIES SERVED: OTHER FABRICATING PRODUCTS
TESCO can deliver a broad range of solutions for general engineering applications. TESCO provides comprehensive finish-machining capabilities, specializing in the machining of materials with exceptional wear and corrosion resistance. Our highly skilled engineers and team, backed by years of experience and advanced equipment allow us to manufacture components to precise specifications, ensuring the highest quality and performance. Even the small tips and the big bushings you will find satisfactory solutions here. We are your valuable partners for the whole supply chain.
1. STELLITE BULK / COBALT ALLOY BULK
2. STELLITE BLOCK / COBALT ALLOY BLOCK
3. STELLITE PLATE / COBALT ALLOY PLATE
4. STELLITE SHEET / COBALT ALLOY SHEET
5. STELLITE ROUND BAR / COBALT ALLOY ROUND BAR
6. STELLITE TUBE / COBALT ALLOY TUBE
PRODUCTION LINE
​TESCO operates its own powder metallurgy factory, casting facility, continuous casting production line, forging and rolling production lines, and machining workshops. This comprehensive infrastructure covers the essential processes for cobalt-based alloy production. We are comitted to meeting your high-precision product requirements. From material selection and structural design to product machining and assembly, we offer a one-stop solution to ensure exceptional quality and performance.
FASTEST DELIVERY IN THE WORLD
Tesco Steel & Engineering is focused on creating the fastest seamless experience to buy premium quality stellite products. We export our products to more than 142 countries.
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We have most standard sizes in ready stock and ship them through air or sea depending on the size and weight of the products. In case of sizes which are not in stock, we can manufacture them in 3-4 days. For the most urgent orders, we are specialized in delivering the product to you within 7 days.
Countries we export to: Stellite Products Manufacturers / Suppliers / Stockist in Kuwait, UAE, Germany, Saudi Arabia, West Africa, Iraq, Congo, Mexico, Bahrain, Canada, Philippines, Thailand, Kenya, Oman, Malaysia, Turkey, Qatar, Sudan, Netherlands, Oman, Nigeria, Lithuania, Gabon, Russia, Vietnam, Angola, Bolivia, Indonesia, UK, Yemen, Italy, United States, Venezuela, Spain, Iran, Estonia, Kazakhstan, Algeria, Jordan, Ecuador, Portugal, Colombia, Libya, Chile, Peru, Iran, South Africa, Bangkok, Namibia, Jeddah, Afghanistan, Israel, Zambia, Macau, Morocco, Denmark, Taiwan, Norway, Belarus, North Macedonia, Lebanon, Sri Lanka, Bhutan, Bulgaria, Albania, Ukraine, Belgium, Finland, Slovokia, Tibet, Romania, France, Brazil, Trinidad & Tobago, Fiji, Tunisia, Gambia, Mexico, Hungary, Zimbabwe, Mongolia, Ghana, Egypt, Kazakhstan, Czech Republic, Azerbaijan, Poland, Greece, Costa Rica, Kosovo, New Zealand, Croatia, Puerto Rico, Tanzania, Somalia.
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Major Exporting Areas: Stellite Products Manufacturers / Suppliers / Stockist in Moscow, Port-Of-Spain, Seoul, Montreal, Dubai, Kuala Lumpur, Aberdeen, Tehran, Bogota, Petaling Jaya, Melbourne, Abu Dhabi, Courbevoie, Edmonton, Ho Chi Minh City, Bangkok, Toronto, Muscat, Milan, Busan, Mexico City, Perth, La Victoria, Santiago, Rio de Janeiro, London, Karachi, Los Angeles, Manama, Geoje-si, Atyrau, Sydney, Riyadh, New York, Jeddah, Houston, Granada, Jakarta, Brisbane, Algiers, Kuwait City, Dubai, Hanoi, Doha, Al Jubail, Chiyoda, Cairo, Gimhae-si, Caracas, Lagos, Al Khobar, Madrid, Singapore, Calgary, Colombo, Ulsan, Istanbul, Ahvaz, Dammam, Dallas, Texas, Ankara, Sharjah, Vung Tau, Angola, Benin, Burundi, Botswana, Burkina Faso, Cameroon, Douala, Central African Republic, Republic of Congo, Democratic Republic of Congo, Côte d'Ivoire, Djibouti, Eritrea, Ethiopia, Equatorial Guinea, Gabon, Guinea, Kenya, Liberia,Malawi, Mali, Mauritania, Mauritius, Casablanca-Settat, Tanger-Tetouan-Al Hoceima, Fès-Meknès, Marrakesh-Safi, Oriental, Béni Mellal-Khénifra, Souss-Massa, Laâyoune-Sakia El Hamra, Rabat-Salé-Kénitra region, Mozambique, Temara, Niger, Rwanda, Senegal, Sierra Leone, Sudan, Tanzania, Togo, Uganda, Bangkok, Bangchan, Khlong Sam Wa, Gemopolis, Lard Krabang, Pathumthani, Bangkadi, Navanakorn, Samut Prakarn, Bangplee, Bangpoo, Saraburi, Nongkhae, SIL I/Land, Chachoengsao, 304 I/P, Gateway City, Wellgrow, Rayong, Amata City, Eastern Seaboard, Hemaraj Eastern Seaboard, Rojana, Soam Eastern, Chonburi, Amata Nakorn, Hemaraj Chonburi, Pinthong, Ayutthaya, Bangpa-in, Saha Ratna Nakorn, Nakornratchasima, Kabinburi, Prachinburi, HCMC, Tan Thuan Export Processing Zone, Bien Hoa, Dong Nai Province, Amata City Bien Hoa Industrial Park, Long Binh Techno Park, Binh Duong Province, Vietnam Singapore Industrial Park, My Phuoc Industrial Park, Ho Nai Industrial Zone, Bau Xeo Industrial Park, Long Thanh Industrial Zone, Long Duc Industrial Park, Duc Hao I, Tan Huong, Long Jiang, Tra Noc I/II, Hung Phu I, Hiep Phuoc Industrial Park, Phuoc Dong Industrial Park, Dinh Vu – Cat Hai Economic Zone.