Description
Product Overview
Our Cobalt-Base Alloy Welding Powders are premium gas-atomized / plasma-atomized spherical powders designed for critical hardfacing and surface engineering applications. Formulated with a cobalt solid-solution matrix reinforced with hard chromium and tungsten carbides, these alloys deliver unmatched structural stability, oxidation resistance, and wear protection under elevated temperatures, heavy mechanical loads, and aggressive chemical media.
Whether facing severe metal-to-metal friction, high-pressure steam erosion, or chemical corrosion, our cobalt-base powders significantly extend component service life and lower Total Cost of Ownership (TCO) across power generation, oil & gas, petrochemical, and automotive industries.
Core Advantages & Metallurgical Highlights
Outstanding High-Temperature Red Hardness:
Maintains high yield strength, impact toughness, and microstructural integrity at continuous working temperatures exceeding 650°C – 800°C.
Superior Galling & Cavitation Erosion Resistance:
The cobalt matrix resists self-welding and adhesive wear under unlubricated contact or dry friction conditions.
Multi-Mechanism Corrosion & Oxidation Defense:
High chromium content creates an adherent, self-healing oxide passivation layer resistant to oxidizing acids, hot gases, and molten glass/salts.
Optimized Spherical Morphology & High Flowability:
High sphericity with low satellite count, uniform particle density, and controlled Hall Flow rate—ensuring stable powder feeding, minimal porosity, and high deposition efficiency.
Metallurgical Bonding & Crack-Free Deposition:
Low oxygen content (<300 ppm) enables low dilution rates and superior crack resistance during multi-layer cladding.
| Cobalt—Base Welding Powder | |||||||||||||
| Trademark | Nominal Chemical Composition(wt%) | HRC | Application | Reference Standard | |||||||||
| C | Cr | Si | W | Ni | Fe | Mn | Mo | Co | B | ||||
| CAG-Co1 | 2.40 | 30.00 | 1.00 | 12.00 | ≤ 3.00 | ≤ 3.00 | ≤ 1.00 | ≤ 1.00 | Bal | — | 48-54 | Valve seat inserts, bearing, cutter edge, rotary ring, etc. | Stellite 1 |
| CAG-Co3 | 2.30 | 30.00 | 1.00 | 12.00 | ≤ 3.00 | ≤ 3.00 | — | — | Bal | — | 48-54 | Needle holders, steel mill guide roll, valve seat inserts, etc. | Stellite 3 |
| CAG-Co6 | 1.20 | 30.00 | 1.00 | 4.50 | ≤ 3.00 | ≤ 3.00 | ≤ 1.00 | ≤ 1.00 | Bal | — | 38-44 | Engine valve, high temperature, pressure valve, turbine blade, etc. | Stellite 6 |
| CAG-Co12 | 1.40 | 30.00 | 1.40 | 8.50 | ≤ 3.00 | ≤ 3.00 | ≤ 1.00 | ≤ 1.00 | Bal | — | 44-50 | High temperature, pressure valves, saw teeth, screw flights, etc. | Stellite 12 |
| CAG-Co20 | 2.50 | 32.00 | 1.00 | 18.00 | ≤ 3.00 | ≤ 3.00 | ≤ 1.00 | ≤ 1.00 | Bal | — | 52-57 | Wear plate, bearing sleeve, etc. | Stellite 20 |
| CAG-Co21 | 0.20 | 28.00 | 2.00 | 0.15 | ≤ 3.00 | 2.00 | ≤ 1.00 | 5.50 | Bal | — | 20 | Fluid valve seat, turbine blades | Stellite 21 |
| CAG-Co25 | 0.10 | 20.00 | 1.00 | 15.00 | 10.00 | ≤ 3.00 | ≤ 2.00 | ≤ 1.00 | Bal | — | cold hard | Extrusion die | Stellite 25 |
| CAG-Co31 | 0.50 | 26.00 | 1.00 | 8.00 | 10.50 | 2.00 | ≤ 1.00 | — | Bal | — | 28-34 | Extrusion die, turbine blade, etc. | Stellite 31 |
| CAG-Co157 | 0.10 | 22.00 | 1.50 | 5.00 | ≤ 3.00 | ≤ 3.00 | ≤ 0.50 | ≤ 1.00 | Bal | 2.5 | 50-56 | Top of motor car valve | Stellite 157 |
| CAG-Co158 | 0.80 | 29.00 | 1.50 | 5.50 | ≤ 3.00 | ≤ 3.00 | ≤ 1.00 | ≤ 1.00 | Bal | 0.8 | 40-46 | Pressure valves, high temperature, screw flights, etc. | Stellite 158 |
| CAG-CoF | 1.70 | 26.00 | 1.20 | 12.00 | 22.00 | ≤ 3.00 | ≤ 1.00 | ≤ 1.00 | Bal | — | 38-44 | Inlet and exhaust valve | Stellite F |
| *Note: Deloro Stellite is a registered trademark. | |||||||||||||
Industrial Applications & Case Scenarios
Valves & Pressure Piping: High-pressure steam control valves, nuclear gate valves, offshore subsea ball valves, and chemical slurry seats.
Power Generation & Turbines: Gas turbine blades, steam turbine nozzle segments, boiler feed pump sleeves, and burner nozzles.
Automotive & Marine Engines: Diesel/gasoline engine intake & exhaust valves, valve seat inserts, and turbocharger wastegate bushings.
Petrochemical & Polymer Processing: Scraper blades, decanter centrifuge components, extruder feed rolls, and hot slurry pumps.
Metalworking & Tooling: Hot shear blades, steel mill entry guide rolls, non-ferrous extrusion dies, and dry-battery punch dies.
Packaging & Quality Assurance
Standard Packaging: 5 kg / plastic bottle, 20 kg / hermetically sealed metal drum, or 50 kg / vacuum-sealed nitrogen drum with desiccant.
Comprehensive Quality Documentation: Every batch is shipped with:
Material Test Certificate (MTC) with complete chemical analysis (ICP / OES).
Reviews
There are no reviews yet.