Aug 6 2013
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Machinability
Forging
Welding
Annealing
Hot Working
Cold Working
Aging
Applications
Introduction
Super alloy HAYNES C 263 is a nickel-cobalt-chromium alloy that also contains molybdenum to provide it hot strength. It is age-hardenable and comparatively easy to form with a good high temperature performance. This alloy is primarily used for applications up to 900°C (1650°F).
The following sections will discuss in detail about super alloy HAYNES C 263.
Chemical Composition
The chemical composition of HAYNES C 263 is outlined in the following table.
|
Element |
Content (%) |
|
Nickel, Ni |
52 |
|
Chromium, Cr |
20 |
|
Cobalt, Co |
20 |
|
Molybdenum, Mo |
6 |
|
Titanium, Ti |
2.4 |
|
Iron, Fe |
0.7 |
|
Aluminum, Al |
0.6 |
|
Manganese, Mn |
0.6 |
|
Silicon, Si |
0.4 |
|
Copper, Cu |
0.2 |
|
Carbon, C |
0.06 |
Physical Properties
The physical properties of HAYNES C 263 are tabulated below.
|
Properties |
Metric |
Imperial |
|
Density |
8.35 g/cm3 |
0.302 lb/in3 |
|
Melting point |
1300-1355°C |
2370-2470°F |
Mechanical Properties
The following table shows mechanical properties of HAYNES C 263 (cold-rolled sheet, solution-treated and aged).
|
Properties |
Metric |
Imperial |
|
Tensile strength |
1050 MPa |
152.3 ksi |
|
Yield strength |
635 MPa |
91.9 ksi |
|
Elastic modulus |
221 GPa |
32.1 psi |
|
Elongation at break |
35.70% |
35.70% |
Thermal Properties
The thermal properties of HAYNES C 263 are tabulated below.
|
Properties |
Metric |
Imperial |
|
Thermal expansion co-efficient (@25-200°C/77-392°F) |
11 .1 µm/m°C |
6.2 µin/in°F |
|
Thermal conductivity |
11.7 W/mK |
81 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to HAYNES C 263 are AMS 5872 and GE B50A774.
Fabrication and Heat Treatment
Machinability
HAYNES C 263 can be machined using the common processes used for iron based alloys. The material work-hardens during machining and has higher strength and gumminess. It is recommended that heavy duty machining equipment and tooling be used. Commonly available commercial coolants can be used for the process.
Forging
Forging of HAYNES C 263 can be performed in the temperature range of 1149-926°C (2100-1700 °F).
Welding
Welding of HAYNES C 263 can be performed using all the traditional welding methods except for submerged-arc welding. It is recommended that a matching alloy filler metal.
Annealing
Annealing of this material can be performed at 1148°C (2100°F) and then rapidly air cooled or water quenched.
Hot Working
HAYNES C 263 can be hot worked in the range of 1148-954°C (2100-1750°F).
Cold Working
Cold working can be performed with the use of standard tooling except for plain carbon tool steels, which produces galling.
Aging
After solution annealing at 1148°C (2100°F), aging can be performed at 799°C (1470°F) for 8 h followed by air cooling.
Applications
HAYNES C 263 is used in the following application areas:
-
Gas turbine hot section components such as medium temperature combustors
-
Aircraft turbine engine components
-
Land-based turbine components
-
Low temperature combustors
-
Transition liners