L605

L605

Alloy L605 (also referenced as HAYNES® 25) is the strongest of the fabricable cobalt alloys, useful for continuous service to 1800°F. Because of its long and widespread use, this alloy has been the subject of many investigations to determine its properties over a wide range of conditions, thus making it an unusually well characterized material. When exposed for prolonged periods at intermediate temperatures, alloy L605 exhibits a loss of room temperature ductility in much the same fashion as other superalloys, such as alloy X or alloy 625.

L605 is welded using gas tungsten arc, gas metal arc, shielded metal arc, electron beam and resistance welding. Submerged arc welding is not recommended. Use good joint fit-up, minimum restraint, low interpass temperature and cool rapidly from welding. For maximum ductility, fabricated components should be annealed 2150-2250°F, rapid cool.

Chemistry

 CrNiCoWCFeMnSiPS
MIN 19.0 9.0 - 14.0 0.05 - 1.0 - - -
MAX 21.0 11.0 Balance 16.0 0.15 3.0 2.0 0.4 0.04 0.03

Specifications

AMS 5537, AMS 5796
EN 2.4964
GE B50A460
UNS R30605
Werkstoff 2.4964

Inventory

L605 Coil, L605 Sheet, L605 Welding Products

Common Trade Names

HAYNES® 25, L-605 Alloy

Features

  • Outstanding high temperature strength
  • Oxidation resistant to 1800°F
  • Galling resistant
  • Resistant to marine environments, acids and body fluids

Applications

  • Gas turbine engine components such as combustion chambers and afterburners
  • High temperature ball bearings and bearing races
  • Springs
  • Heart valves

Physical Properties

Density: 0.330 lb/in3
Melting Range: 2425-2570°F

Temperature, °F 70 800 1000 1200 1400 1600 1800
Coefficient* of Thermal Expansion,
in/in°F x 10-6
- 7.8 8.0 8.2 8.6 9.1 9.4
Thermal Conductivity
Btu • ft/ft2 • hr • °F
- 10.0 11.2 12.5 13.7 15.2 16.7
Modulus of Elasticity Dynamic, psi x 106 33 28 27 26 24 23 21

* 70°F to indicated temperature.

Mechanical Properties

Representative Tensile Properties, Sheet

Temperature, °F 70 1200 1400 1600 1800
Ultimate Tensile Strength, ksi 146 108 93 60 34
0.2% Yield Strength, ksi 69 48 41 36 18
Elongation, % 51 60 42 45 32

Typical Stress-Rupture Strength

Temperature, °F 1200 1400 1500 1600 1700 1800
100 Hours, ksi 69 36 25 18 12 7
1,000 Hours, ksi 57 26 18 12 7 4

Haynes 25® is a Trademark of Haynes International