Products Features
Excellent High-Temperature Strength and Creep Resistance
UMCo-50 exhibits outstanding tensile strength and creep resistance in the temperature range of 800-1100°C through solid solution strengthening and carbide strengthening of the cobalt matrix. At 1000°C, its tensile strength remains above approximately 100 MPa, making it suitable for furnace rolls, guides, and support components that endure long-term high-temperature loads.
Superior Oxidation and Thermal Corrosion Resistance
The high chromium content (approximately 28%) promotes the formation of a dense and stable Cr₂O₃ oxide film on the alloy surface, effectively preventing matrix oxidation in oxidizing atmospheres up to 1100°C. Additionally, the cobalt matrix offers good resistance to thermal corrosion media such as sulfur and vanadium, making it particularly suitable for combustion environments involving sulfur-containing fuels.
Good Thermal Fatigue and Microstructural Stability
UMCo-50 maintains microstructural stability during prolonged high-temperature service, with minimal precipitation of harmful phases (e.g., σ phase). It possesses excellent thermal fatigue resistance. Even under conditions of frequent temperature fluctuations, its mechanical and oxidation properties remain stable, making it applicable to industrial furnaces and gas turbine components with frequent start-up and shutdown cycles.
Good Casting and Machinability
UMCo-50 can be formed using precision casting and sand casting processes, suitable for manufacturing complex-shaped heat-resistant components. The alloy has good machinability, allowing for conventional machining operations such as turning, milling, and drilling. Its welding performance is moderate and requires the use of specialized welding materials and procedures.
Technical Specifications
Chemical Composition
|
Element |
Standard Requirements |
Notes |
|
Co |
Remaining amount (48-52%) |
Matrix elements that provide high-temperature strength, thermal stability, and excellent thermal corrosion resistance |
|
Cr |
27.0 - 29.0% |
Form a dense Cr₂O₃ protective film, providing oxidation and thermal corrosion resistance |
|
Fe |
20.0 - 22.0% |
Improve the machinability and cost-effectiveness of the alloy by partially stabilizing the austenitic microstructure |
|
C |
0.10 - 0.20% |
Forming a small amount of carbides to enhance high-temperature strength and creep resistance |
|
Si |
≤ 1.0% |
Deoxidizer, improve antioxidant properties |
|
Mn |
≤ 1.0% |
Deoxidizer, improve hot working properties |
|
Ni |
≤ 1.0% |
Strictly control to ensure the purity of the cobalt matrix |
|
W |
≤ 0.5% |
Minor addition, auxiliary solid solution strengthening |
|
Mo |
≤ 0.5% |
Minor addition, auxiliary solid solution strengthening |
|
P |
≤ 0.030% |
Impurity elements |
|
S |
≤ 0.025% |
Prevent hot brittleness |
Physical Properties
|
Property |
Value/Range |
Test Conditions |
|
Density |
8.40 - 8.50 g/cm³ |
Room temperature (20°C) |
|
Melting Point |
1350 - 1400°C |
- |
|
Coefficient of Thermal Expansion (20-100°C) |
13.0 - 14.0 × 10⁻⁶ /K |
- |
|
Elastic modulus (Young's modulus) |
200 - 220 GPa |
Room Temperature |
|
Thermal Conductivity (20°C) |
14.0 - 15.0 W/(m·K) |
- |
|
Resistivity |
0.95 - 1.05 μΩ·m |
- |
|
Magnetism |
Non-magnetic (weakly magnetic) |
Cobalt-based alloys are typically non-magnetic or weakly magnetic at room temperature |
Mechanical Properties (Cast/Annealed Condition, Typical Values)
|
Performance |
Typical value |
Reference standard |
|
Room temperature tensile strength |
600 - 750 MPa |
- |
|
Room Temperature Yield Strength (0.2% Offset) |
350 - 450 MPa |
- |
|
Room temperature elongation |
10 - 20% |
- |
|
Hardness (Cast Condition) |
180 - 240 HB(≈ 85-100 HRB) |
- |
|
Tensile strength at 800°C |
200 MPa |
- |
|
Tensile strength at 1000°C |
100 MPa |
- |
High-temperature performance
UMCo-50 exhibits excellent strength retention at high temperatures, with the following typical reference values:
|
Temperature |
Tensile Strength (Typical Value) |
|
Room Temperature |
600-750 MPa |
|
600°C |
350 MPa |
|
800°C |
200 MPa |
|
1000°C |
100 MPa |
|
1100°C |
60 MPa |
Antioxidant Performance:
In oxidizing atmospheres up to 1100°C, UMCo-50 forms a dense and well-adhered Cr₂O₃ oxide layer on its surface, resulting in an oxidation weight gain rate significantly lower than that of conventional stainless steels and iron-based heat-resistant steels. In environments involving combustion of sulfur-containing fuels, its thermal corrosion resistance is markedly superior to many iron-based and nickel-based alloys.
Microstructural Stability:
During long-term exposure at temperatures between 800-1100°C, UMCo-50 maintains microstructural stability with a low tendency for harmful phase precipitation, ensuring its mechanical properties and toughness during high-temperature prolonged service.
Applicable Media:
1. High-temperature air and combustion flue gases (containing sulfur and vanadium)
2. High-temperature oxidizing atmospheres
3. Thermal corrosion environments (containing Na₂SO₄, V₂O₅, etc.)
4. High-temperature gaseous streams (flow path environment of gas turbines)
Note: UMCo-50 is primarily intended for use in high-temperature gaseous media environments and is not suitable for aqueous corrosion environments.
UMCo-50 is specifically designed for extreme high-temperature, oxidation, and thermal corrosion environments, and is recommended for the following fields:
Application Fields
-
Gas Turbines: Hot-end components such as turbine guide vanes, seal rings, combustion chamber liners, and transition pieces, utilizing its high-temperature strength, oxidation resistance, and thermal corrosion resistance below 1100°C.
-
High-Temperature Industrial Furnaces: Furnace rolls, radiation tubes, guides, baskets, fixtures, furnace bottom plates, and heat treatment tooling, maintaining dimensional stability and oxidation resistance under continuous high temperatures.
-
Petrochemical Industry: Support components for ethylene cracking furnace tubes, high-temperature reactor internals, high-temperature wear-resistant parts for catalytic cracking units, and heating furnace tubes.
-
Power Generation: High-temperature fasteners for steam turbines, boiler burner nozzles, and high-temperature corrosion-resistant components in waste-to-energy power plants.
-
Glass and Ceramic Industries: Glass forming molds, hot pressing molds, and glass fiber drawing bushings, due to its excellent corrosion resistance and thermal fatigue resistance to molten glass.
-
Automotive Engines: High-performance turbocharger turbine housings and exhaust manifold gaskets, capable of withstanding exhaust high temperatures and thermal cycling.
-
Steel Metallurgy: Annealing furnace linings, submerged rolls in hot-dip galvanizing baths, and furnace bottom rolls in continuous annealing furnaces.
Delivery and Customization
We offer flexible and reliable supply chain solutions to ensure you receive UMCo-50 materials that perfectly match your project requirements.
Constant Inventory Form
|
Form |
 Precision castings / Sand mold castings
|
 Sheets / Thin plates
|
 Bar / Round Steel
|
 Steel pipe / Pipe material
|
 Strip / Coil
|
Wire / Filament
|
|---|---|---|---|---|---|---|
|
Conventional Range |
Customize according to the drawings |
Thickness 0.5–100 mm |
Diameter Φ6–500 mm |
Outer diameter Φ10–300 mm |
Thickness 0.1–3.0 mm |
Diameter Φ0.5–10 mm |
|
Customization Capability |
Core form. Suitable for complex-shaped heat-resistant components such as gas turbine guide vanes, furnace rolls, guides, baskets, and glass molds. |
Used for stamping parts, gaskets, furnace liners, heat shields, etc. Can be cut into irregularly shaped parts. |
Used for machining into high-temperature bolts, fasteners, valve stems, and shaft parts. It can be forged into shape. |
Used for high-temperature furnace tubes, |
Used for manufacturing bellows, |
Used for welding wires |
Why Choose Us? - Reliable Engineering Technology. Dependable Delivery.
We are not just a supplier, but a trusted materials partner for you in China.
Vertically Integrated Production
Own 20,000㎡ facility with 10+ automated lines (8,000+ tons/year). In-house tooling & die center enables rapid customization and effective cost control - no middleman markup.
Strict Quality Control at Every Stage
Full traceability across key QC checkpoints throughout production. 100% compliant with ASTM/ASME, EN, and GB standards. Material test reports available with every shipment.
Reliable Delivery & Export Packaging
10+ years exporting to Europe, North America, Southeast Asia & Middle East with waterproof and anti-rust protection, combined with flexible shipping options ensures safe and on-time arrival.
Sample Validation Before Mass Production
We provide free samples for quality verification, allowing you to place bulk orders only after approval. We ensure consistency from sample to mass production by accurate dimensional measurement and transparent manufacturing.
FAQ
Q: What are the main advantages of UMCo-50?
Q: What heat treatment is required for UMCo-50?
Q: What is the maximum service temperature?
Q: What is the difference between UMCo-50 and Hastelloy X?
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