HAYNES® 25 Alloy, also known as L605, is a cobalt-nickel-chromium-tungsten alloy known for its outstanding high-temperature strength and excellent resistance to oxidation and sulfidation. This alloy is particularly useful for prolonged exposure to temperatures up to 1800°F (980°C), with good forming and welding characteristics. It also has excellent resistance to metal galling.
Key Properties
- High-Temperature Strength: Maintains strength at temperatures up to 2000°F (1095°C).
- Oxidation Resistance: Provides excellent oxidation resistance up to 1800°F (980°C).
- Sulfidation Resistance: Exhibits very good resistance to sulfidation.
- Galling Resistance: Excellent resistance to metal galling, reducing wear and friction in high-stress environments.
- Formability: Can be hot or cold worked, though it work-hardens quickly and requires frequent annealing during complex forming processes.
- Weldability: Compatible with various welding techniques, including GTAW, GMAW, shielded metal arc, electron beam, and resistance welding.
Chemical Composition
ElementPercentage (wt%)Chromium (Cr)19.0 - 21.0Tungsten (W)14.0 - 16.0Nickel (Ni)10.0 - 15.0Iron (Fe)≤ 3.0Manganese (Mn)1.0 - 2.0Carbon (C)0.05 - 0.15Phosphorus (P)≤ 0.04Sulfur (S)≤ 0.03Silicon (Si)≤ 0.4Cobalt (Co)Balance
Physical Properties
PropertyValueUnitsDensity9.13g/cm³Melting Point1330 - 1410°CThermal Expansion10.1 - 17.1E-6 / KThermal Conductivity55.4 - 75.5W / m*KSpecific Heat456J/kg*K
Mechanical Properties at Room Temperature
PropertyValueTensile Strength (Rm)960 MPaYield Strength (Rp0.2)415 MPaElongation (A5)35%
Fabrication and Formability
- Hot Working: Can be hot-worked at temperatures between 1900°F and 2300°F. The material should be held at 2200°F (1205°C) long enough to ensure the entire piece reaches the desired temperature.
- Cold Working: Exhibits good ductility for cold working but work-hardens rapidly, necessitating frequent intermediate annealing.
- Annealing: Hot- or cold-worked parts should be annealed and rapidly cooled to restore the best balance of properties.
Welding
HAYNES® 25 alloy is weldable by both manual and automatic methods, including:
- Gas Tungsten Arc Welding (GTAW)
- Gas Metal Arc Welding (GMAW)
- Shielded Metal Arc Welding
- Electron Beam Welding
- Resistance Welding
It demonstrates good restraint welding characteristics.
Specifications
- UNS: R30605
- Specifications: AMS 5537 (plate, sheet, and strip)
- Other Specifications: AMS 5796 (welding wire), Werkstoff Nr. 2.4964
Applications
HAYNES® 25 Alloy is suitable for a variety of applications, particularly in the aerospace industry. Its high-temperature strength and resistance properties make it ideal for:
- Gas Turbine Components: Combustion cans, flame holders, liners, transition ducts, and afterburner parts.
- Bearings: Both balls and races in high-stress environments.
- Other High-Temperature Industrial Applications: Components exposed to harsh conditions requiring strong, durable materials.
For more information :
Website: https://www.aluminiumwala.com
Contact us: 9167347029
Email ID: plusmetals@aluminiumwala.com
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