Haynes 25 is a cobalt-based alloy which combines good formability and excellent high-temperature properties. The high strength properties of this alloy may be obtained through cold work. It remains nonmagnetic in the work hardened condition.
This alloy is generally melted using vacuum induction melting (VIM), followed by electroslag remelting (ESR). The finished mill product is supplied in the solution- annealed or cold-worked condition, depending on section size and application.
Haynes Alloy 25 is a solid solution strengthened cobalt-chromium-tungsten-ni alloy with excellent high-temperature strength and 2000°F oxidation resistance, as well as excellent resistance to vulcanization, abrasion and wear. L-605 / Alloy 25 has excellent forming properties, capable of forging, hot working, or cold working, although its work hardening rate is very rapid, so frequent intermediate annealing is recommended for complex forming operations. Haynes 25 welding uses gas tungsten arc, gas metal arc, protective metal arc, electron beam and resistance welding. Submerged arc welding is not recommended. A similar composition wire (AMS 5796) or coated electrode (AMS 5797) is used. Alloy L-605 / Alloy 25 is heat-treated in solution in the range of 2150-2250°F with rapid air or water quenching for best performance. When exposed at moderate temperatures for long periods of time, Haynes 25 exhibits the same room-temperature ductility loss as other superalloys, such as Alloy X or Alloy 625. Due to its long and extensive use, this alloy has been the subject of much research to determine its performance under a wide range of conditions, thus making it a very good characterization material, alloy L-605 has many applications in military and commercial gas turbine engine components such as rings, blades, and combustion chamber components, although for many modern engines, It has been largely replaced by alloy 188 or alloy 230. Haynes 25 welding uses gas tungsten arc, gas metal arc, protective metal arc, electron beam and resistance welding. Submerged arc welding is not recommended.
Haynes Alloy 25 is a cobalt-based, precipitation-hardenable superalloy that is known for its high strength, corrosion resistance, and oxidation resistance. It is often used in applications where high temperature resistance is required, such as in combustion chambers, exhaust systems, and heat exchangers.
Properties of Haynes Alloy 25:
- Melting point: 1450°C (2642°F)
- Tensile strength: 480 MPa (70,000 psi)
- Corrosion resistance: Good
- Oxidation resistance: Excellent
- Operating temperature range: -200°C to 1250°C (-330°F to 2282°F)
- Weldability: Good
Applications of Haynes Alloy 25:
- Combustion chambers: Haynes Alloy 25 is often used in the construction of combustion chambers because of its high strength and oxidation resistance.
- Exhaust systems: Haynes Alloy 25 is also used in the construction of exhaust systems because of its ability to withstand high temperatures and corrosive gases.
- Heat exchangers: Haynes Alloy 25 is also used in the construction of heat exchangers because of its good thermal conductivity.
- Medical implants: Haynes Alloy 25 is also used in the production of medical implants, such as heart valves and stents, because of its biocompatibility.
Haynes Alloy 25 is a versatile material with a wide range of applications. It is well-suited for applications where high strength, corrosion resistance, and oxidation resistance are required.
Safety precautions for working with Haynes Alloy 25:
- Wear protective clothing. This includes long sleeves, pants, gloves, and a face shield.
- Work in a well-ventilated area. Haynes Alloy 25 can emit fumes that can be harmful if inhaled.
- Avoid contact with the skin. If Haynes Alloy 25 comes into contact with your skin, wash it immediately with soap and water.
- Do not weld or braze Haynes Alloy 25 in a confined space. The fumes can build up and create a dangerous environment.
- Dispose of Haynes Alloy 25 properly. Do not burn or bury it, as this could release harmful fumes.
By following these safety precautions, you can help to ensure a safe and productive work environment.
IHaynes 25(Alloy L605) Characteristic
- Outstanding high temperature strength
- Oxidation resistant to 1800°F
- Galling resistant
- Resistant to marine environments, acids and body fluids
Haynes 25(Alloy L605) Chemical Composition
Haynes 25(Alloy L605)Physical Properties
Haynes 25(Alloy L605)Mechanical Properties
|Mechanical & Physical Properties||21°C||427°C||538°C||649°C||760°C||816°C||871°C||927°C||982°C|
|Coefficient of Thermal Expansion µm/m⁰C||-||14||14.4||14.8||15.5||-||16.4||-||16.9|
|Thermal Conductivity /kcal/(hr.m.°C)||-||14.9||16.7||18.6||20.4||-||22.6||-||24.8|
|Modulus of Elasticity/ x105 MPa||2.28||1.93||1.86||1.79||1.65||-||1.59||-||1.45|
|Ultimate Tensile Strength /Mpa||1006.6||-||-||744.6||641.2||-||413.7||-||234.4|
|0.2% Yield Strength /MPa||475.7||-||-||331||282.7||-||248.2||-||124.1|
|100 hr Rupture Strength/ Mpa||-||-||-||475.7||248.2||172.4||124.1||82.7||48.3|
|1000 hr Rupture Strength/ Mpa||-||-||-||393||179.3||124.1||82.7||48.3||27.6|
- Bars & Rods & Foring Ring /Flanges
- Sheet & Plate
- Strip & Coil
- Welding Wire &Spring wire
- Seamless Tube & Welded Pipe
»Round Bar & Square Bar & Hexagon Bar
● Diameter : φ8～φ300mm Length:10mm-6000mm
● Hot forging, Hot Rolling, Cold Drawing
● Bright Surface, Polished Surface, Black Surface
»Tube & Pipe:Seamless Tube& Welded Pipe
● Cold Drawing Seamless Pipe： φ1.0～φ220mm
● Hot Extrusion pipe: φ50～φ250mm
● Others : U Blend Tube and Elbow
»Hot Rolled Plate & Cold Rolled Sheet
● Cold Rolling Sheet Thickness: ≦2.0mm Width:≦1500m
● Hot rolling Plate Thickness: ≧4.0mm Width: ≦2500m
»Strip & Tape Ribbon
● Thickness: ≧ 0.01mm Width: 15mm-300mm
● Cold rolling BA Strip, Hard & Soft Condition
»Straight Length Wire & Spool Wire
● Welding Wire: φ 0.1mm～6.0mm Cut length Rod: φ1.0～φ8.0mm
● Package : 5-25kg/Spool or Box
Haynes 25(Alloy L605) ApplicationsI
- Hot-section of gas turbine engines
- Combustion chambers, liners and afterburners
- High temperature ball bearings and bearing races
- High temperature furnace components
Haynes 25 is a solid solution-strengthened cobalt-chromium-nickel-molybdenum alloy that is known for its excellent high-temperature strength and corrosion resistance. It is commonly referred to as Haynes 25 or L605. This alloy was originally developed by Haynes International, Inc., a leading producer of high-temperature alloys.
Haynes 25 wire is a specific form of this alloy that is drawn down to a smaller diameter and typically supplied in the form of a thin, continuous strand or wire spools. The wire form of Haynes 25 retains the same high-temperature properties and corrosion resistance as the bulk alloy but offers additional benefits due to its versatility and ease of use in various applications.
Key properties and applications of Haynes 25 wire include:
High-temperature strength: Haynes 25 wire maintains its mechanical strength at elevated temperatures, making it suitable for applications in high-temperature environments, such as gas turbine engine components and aerospace applications.
Oxidation resistance: The alloy’s composition provides excellent resistance to oxidation and other forms of high-temperature degradation, ensuring the wire’s performance and longevity in demanding conditions.
Corrosion resistance: Haynes 25 wire exhibits good resistance to various corrosive environments, including those containing sulfuric acid and other aggressive chemicals, making it suitable for applications in chemical processing and industrial settings.
Wear resistance: The alloy’s hardness and wear resistance make it suitable for applications where the wire will encounter abrasive conditions or frictional wear.
Biocompatibility: Haynes 25 wire has been used in some medical applications, such as certain types of surgical implants, where its biocompatibility and corrosion resistance are essential factors.
Electrical and thermal conductivity: The alloy’s good electrical and thermal conductivity properties make it useful in certain electrical applications, including spark plug electrodes and resistance heating elements.
Weldability: Haynes 25 wire is weldable using standard welding techniques, allowing for ease of fabrication and joining with other components.
Due to its exceptional high-temperature and corrosion-resistant properties, Haynes 25 wire finds use in various critical applications across industries such as aerospace, gas and steam turbine components, chemical processing, nuclear power, and some medical devices. It is valued for its reliability and performance in extreme environments where conventional materials might fail or degrade.