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
|
|
Cr
|
Ni
|
Co
|
W
|
C
|
Fe
|
Mn
|
Si
|
P
|
S
|
|
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 Weld Wire
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®
