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L605 AMS 5537, AMS 5759


Cobalt Alloy L605 has good formability, high strength to 1500°F (816°C), and good oxidation resistance to 2000°F (1093°C). The alloy also has good sulfidation resistance and resistance to wear and galling. Alloy L605 is used in the hot sections of aircraft and land based gas turbines in combustor liners and other applications requiring moderate strength and good oxidation resistance at high temperatures. The alloy can also be used in industrial furnace applications such as muffles and liners in high temperature kilns.

Common Applications of Cobalt Alloy L605

  • Aircraft engine combustor liners
  • Land based gas turbine combustor liners
  • Industrial furnace liners

Specifications:

  • AMS 5537
  • AMS 5759
  • EN 2.4964
  • B50TF26
  • PWA-LCS
  • GE-S400/1000

Features:

  • Good fabricability and weldability
  • Retains excellent strength and ductility at elevated temperatures
  • Good sulfidation resistance
  • Excellent metallurgical stability at high temperatures

Chemical composition of L605

 

C

Mn

Si

Cr

Ni

W

La

B

Fe

Co

MIN

0.05

0.20

20.0

20.0

13.0

0.02

MAX

0.15

1.25

0.50

24.0

24.0

16.0

0.12

0.015

3.0

Bal.

Physical properties of L605

  • Density 0.330 lb/in³   9.14 g/cm³
  • Melting Range 2375-2425 °F   1300-1330 °C
  • Specific Heat 0.097 at  70 °F, Bru/lb °F   405 at 21 °C, J/kg °C
  • Permeability 1.0007 at 200 oersted
  • Coefficient of Expansion 6.6 0-200 °F, 10¯⁶ in/in●°F
  • Thermal conductivity 84 Btu●in/ft²●h●°F   W/wm●°C
  • Electrical Resistivity 613 ohm●circ mil/ft   102.0 microhm-cm

Mechanical Properties of L605

Yield Strength

Tensile Strength

Elongation

ksi

MPa

ksi

MPa

%

65

446

140

963

55


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