Products Features
Excellent High-Temperature Strength and Creep Resistance
MAR-M 509 possesses outstanding tensile strength, yield strength, and creep resistance at high temperatures due to solid solution strengthening (tungsten) in the cobalt matrix and dispersion strengthening by carbides (MC and M₂₃C₆ types). The alloy's long-term strength at 900°C is 40-50 MPa higher than that of the comparable alloy X-40, with an improved temperature capability of 40-50°C. It is suitable for stationary components such as turbine guide vanes and guides that are subjected to prolonged high-temperature stress.
Good Oxidation and Heat Corrosion Resistance
The high chromium content (approximately 23%) promotes the formation of a dense and stable Cr₂O₃ oxide film on the alloy surface, effectively preventing matrix oxidation in high-temperature oxidizing atmospheres. Additionally, the addition of elements such as tantalum and tungsten further enhances the alloy's heat corrosion resistance. The cobalt matrix offers good resistance to hot corrosion media such as sulfur and vanadium, making it particularly suitable for high-temperature environments in aircraft engines and industrial gas turbines.
Good Microstructural Stability and Thermal Shock Resistance
MAR-M 509 maintains stable carbide structure during long-term high-temperature service and exhibits good thermal shock resistance. Even under conditions of frequent temperature fluctuations, its mechanical properties remain stable, making it suitable for hot-end components in aircraft engines and gas turbines that experience frequent start-up and shutdown cycles.
Casting and Machining Properties
MAR-M 509 is primarily formed using precision casting (investment casting) processes, which are suitable for manufacturing complex-shaped hot-end components such as turbine guide vanes and guides. The alloy has generally acceptable machining properties and is recommended to be machined with hard metal cutting tools. Its weldability is limited and requires the use of specialized processes.
Technical Specifications
Chemical Composition
|
Element |
Standard Requirements |
Notes |
|
Co |
Remaining quantity(52.5-58.45%) |
Matrix elements that provide high-temperature strength, thermal stability, and excellent thermal corrosion resistance |
|
Cr |
22.5 --- 24.35% |
Form a dense Cr₂O₃ protective film, providing oxidation and thermal corrosion resistance |
|
Ni |
9.0 --- 11.0% |
Stabilize the austenitic structure, improve toughness and machinability |
|
W |
6.5 --- 7.5% |
Provides significant solid solution strengthening and carbide strengthening, enhancing high-temperature creep resistance |
|
Ta |
3.0 --- 4.0% |
Form stable MC-type carbides to enhance high-temperature strength and microstructural stability |
|
C |
0.55 --- 0.65% |
Forms carbides with chromium, tungsten, and tantalum, serving as the core source of high-temperature strength |
|
Zr |
0.3 --- 0.6% |
Minor additions to enhance grain boundary strength and creep resistance |
|
Ti |
0.15 --- 0.25% |
Form carbides to assist in strengthening |
|
Fe |
≤ 1.5% |
Strict control to ensure purity and organizational stability |
|
Si |
≤ 0.4% |
Deoxidizer |
|
Mn |
≤ 0.1% |
Deoxidizer |
|
P |
≤ 0.015% |
Impurity element |
|
S |
≤ 0.015% |
Prevent hot brittleness |
Physical Properties
|
Property |
Value/Range |
Test Conditions |
|
Density |
8.86 g/cm³ |
Room Temperature (20°C) |
|
Melting Point |
1346 --- 1395°C |
--- |
|
Coefficient of Thermal Expansion (20-100°C) |
12.0 × 10⁻⁶ /K |
--- |
|
Elastic modulus (Young's modulus) |
200 --- 220 GPa |
Room Temperature |
|
Thermal Conductivity (20°C) |
10 --- 12 W/(m·K) |
--- |
|
Magnetism |
Non-magnetic (weakly magnetic) |
Cobalt-based alloys are typically non-magnetic or weakly magnetic at room temperature |
Mechanical Properties (Annealed Condition, Typical Values)
|
Property |
Typical Value |
Specification |
|
Tensile Strength |
≥ 725 MPa |
AMS 5370 / ASTM B815 |
|
Yield Strength (0.2% Offset) |
≥ 450 MPa |
AMS 5370 / ASTM B815 |
|
Elongation |
≥ 5.0% |
AMS 5370 / ASTM B815 |
|
Hardness (Cast Condition) |
30-35 HRC(≈ 290-330 HB) |
--- |
Note: This alloy is a cast cobalt-based high-temperature alloy. Low elongation is its typical characteristic, and it is suitable for static or low-strain operating conditions.
High-temperature performance
MAR-M 509 exhibits excellent ability to maintain strength at high temperatures, with the following typical reference values:
|
Temperature |
Tensile Strength (Typical Value) |
Sustained Strength (100h, Typical Value) |
|
Room Temperature |
≥ 725 MPa |
--- |
|
650°C |
650 MPa |
--- |
|
815°C |
450 MPa |
230 MPa |
|
900°C |
350 MPa |
150 MPa |
|
980°C |
250 MPa |
90 MPa |
|
1090°C |
150 MPa |
38 MPa |
Antioxidant Performance:
In oxidizing atmospheres up to 1000-1100°C, MAR-M 509 forms a dense and well-adhered Cr₂O₃ oxide layer on its surface, resulting in a lower oxidation weight gain rate compared to conventional stainless steels and many iron-based heat-resistant steels. In environments involving the combustion of sulfur-containing fuels, its thermal corrosion resistance exceeds that of many iron-based and nickel-based high-temperature alloys.
Microstructural Stability:
During long-term exposure at 800-1050°C, the carbide structure of MAR-M 509 remains stable, ensuring its mechanical properties and toughness during prolonged high-temperature service.
Applicable Media:
High-temperature air, combustion flue gases (containing sulfur and vanadium)
High-temperature oxidizing atmospheres
Thermal corrosion environments (containing Na₂SO₄, V₂O₅, etc.)
High-temperature gases (flow path environment of gas turbines)
Note: MAR-M 509 is primarily intended for use in high-temperature gaseous media environments and is not suitable for aqueous corrosion environments.
MAR-M 509 is specifically designed for extreme high-temperature, oxidation, and thermal corrosion environments, and is recommended for use in the following areas:
Application Fields
-
Aerospace: Turbine guide vanes, guides, turbine stator blades, combustion chamber components, and high-temperature seals of aircraft engines.
-
Industrial Gas Turbines: Hot-end stator components such as turbine guide vanes, guides, transition pieces, and seal rings.
-
Power Generation: High-temperature stator components and hot gas path components of gas turbines.
-
Marine Engines: Turbine guide vanes and hot-end components of advanced marine engines.
-
High-Temperature Industrial Furnaces: High-temperature load-bearing components such as furnace rolls, radiation tubes, heat treatment fixtures, and baskets (operating temperature ≤ 1050°C).
Delivery and Customization
We offer flexible and reliable supply chain solutions to ensure you receive MAR-M 509 materials that perfectly match your project requirements.
|
Form |
 Sheet/Plate
|
 Bar/Rod
|
 Pipe / Tube
|
 Strip/Sheet Coil
|
 Wire/Wire Rod
|
Precision Castings (Investment Casting)
|
|---|---|---|---|---|---|---|
|
Conventional Range |
Thickness: 0.5 - 100 mm |
Diameter Φ6-500mm |
Outer diameter Φ10-300mm |
Thickness: 0.1 – 3.0 mm |
Diameter Φ0.5-10mm |
Customize according to the drawings |
|
Customization Capability |
Special thick/thin rolling, extra wide plates; special surface treatment, fixed-length cutting |
Large-sized forged bars (up to Φ800 mm), special-shaped bars |
Large-diameter thick-walled pipes, special alloy composition; Pipe end processing (beveling, fixed length) |
Different hardness conditions, special heat treatment, acid-washed surface |
Special surface treatment, precision drawing |
Core morphology. Suitable for complex-shaped hot-end components such as turbine guide vanes, guides, and seal rings |
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 MAR-M 509?
Q: What heat treatment is required for MAR-M 509?
Q: What is the maximum operating temperature?
Q: What is the difference between MAR-M 509 and X-40?
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