Stellite Round Bar Supplier in Mumbai, India
Stellite Round Bar Specifications
| Standards | AMS 5894; UNS R30006, R30016, R30012, R30021, R30001, R30605; AWS A5.21; ASTM F75, ASTM F1537 |
|---|---|
| Diameter Range | 6 mm to 500 mm (larger forged on request) |
| Length Range | 100 mm to 6000 mm (random, fixed, or cut-to-length) |
| Bar Forms | Round, flat, hex, square, forged profiles |
| Routes | Wrought (hot rolled/forged), cast (investment/sand/centrifugal), HIP |
| Finishes | Ground, rough turned, as-cast, machined, polished |
| Hardness | Grade 6: 38–44 HRC; Grade 12: 47–51 HRC; Grade 1: 51–55 HRC; Grade 21: 27–34 HRC |
What are Stellite Alloy Round Bars?
Stellite round bars are solid cylindrical products made from cobalt-chromium alloys. Their wear resistance comes from hard carbide phases (M₇C₃ and M₆C) spread through a tough cobalt matrix. This is a bulk property, not a surface coating. Even after machining, the material keeps full wear performance.
Bars come as wrought Stellite 6B (UNS R30016) for machining, cast bars for near-net-shape parts, and HIP bars for zero-porosity needs. Stellite outperforms tool steels (D2, H13) by holding hardness at 500–800°C and resisting galling in self-mated contact.
Types & Forms of Cobalt Alloy Round Bar
Wrought Round Bars
Cast Round Bars
Hot Isostatic Pressed Bars
Flat Bars
Hex Bars
Forged Custom Profiles
Get Cobalt /Stellite Alloy / Round Bars at Competitive Prices
Available Grades of Stellite Round Bar
Stellite 6 / Stellite 6B Round Bar
Stellite 6 is the standard grade for general wear resistance, with a hardness range of 38–44 HRC, retained up to 500°C. Stellite 6B is the wrought version per AMS 5894. It is used for valve seats, pump shafts, and erosion shields.
Stellite 12 Round Bar
The higher tungsten content of Stellite 12 round bar gives 47–51 HRC hardness, retained to about 700°C. It is used for cutting tools, saw tips, and glass mold plungers.
Stellite 21 Round Bar
Stellite 21 is a cobalt-chromium-molybdenum alloy at 27–34 HRC, which has the best impact resistance. It is used for valve trim, forging die repair, and medical implants per ASTM F75.
Stellite 1 Round Bar
Stellite 1 is the hardest standard grade, with a hardness range of 51–55 HRC. It is used where maximum abrasion resistance is needed, such as extrusion dies and glass shear blades.
Stellite 25 / L-605 Round Bar
Stellite 25 is built for high-temperature strength up to 982°C, without wear. It is used for gas turbine parts and aerospace structures per AMS 5759.
Industries and Applications of Stellite Round Bar
- Oil & gas valve manufacturing: Stellite round bars are used to make valve seats, gates, balls, stems, and trim.
- Pump & compressor components: They are used for pump wear rings, bearing bushes, impeller wear surfaces, seal faces, piston rings, and sleeves.
- Power generation: Stellite bars protect steam turbine parts, erosion shields, blade tips, boiler feed pump wear rings, and high‑temperature valve trim.
- Aerospace & turbines: Grades like Stellite 25 (L‑605) serve in combustion liners, turbine nozzle vanes, and afterburner parts.
- Glass manufacturing: Stellite 12 and 1 are used for plungers, shear blades, and gob scissors.
- Food & beverage processing: Stellite bars are used for control plates, valve seats, pump parts, and cutting blades.
- Metalworking & cutting tools: They are used for industrial knives, saw tips, hot extrusion dies, pinch rollers, and forging die build‑up.
- Medical & dental: Stellite 21 (ASTM F75) is used for hip and knee implants, dental prostheses, and surgical instruments.
