HAYNES® 263 alloy
Principal Features
Good High-Temperature Strength Up to 1650°F (900°C), Excellent Ductility, and Excellent Weldability
HAYNES® 263 alloy (UNS N07263) is an age-hardenable nickel-cobalt-chromium-molybdenum alloy developed specifically to combine good age-hardened strength properties with excellent fabrication characteristics in the annealed condition. HAYNES® 263 alloy exhibits excellent intermediate temperature tensile ductility, and is not normally subject to strain age cracking problems common for gamma prime strengthened alloys. Its strength at elevated temperature is not quite as high as materials such as HAYNES® 282® alloy, Waspaloy alloy, or R-41 alloy. However, it is much easier to form or weld than Waspaloy alloy and R-41 alloy. Because HAYNES® 282® alloy exhibits superior tensile, creep-rupture, and low cycle fatigue strength than HAYNES® 263 alloy and has significantly greater fabricability than Waspaloy and R-41 alloys, it is replacing HAYNES® 263 alloy in many applications.
HAYNES® 263 alloy is normally used for applications up to about 1650°F (900°C). Its oxidation resistance is comparable to that for other gamma-prime-strengthened superalloys.
Applications
HAYNES® 263 alloy combines properties which make it suitable for a variety of fabricated component applications in both aircraft turbine engine and industrial turbine applications. These include low-temperature combustors, transition liners, and some ring components.
*Please contact our technical support team if you have technical questions about this alloy.
Nominal Composition
| Weight % | |
| Nickel | Balance |
| Cobalt | 20 |
| Iron | 0.70 max. |
| Chromium | 20 |
| Molybdenum | 6 |
| Manganese | 0.40 |
| Silicon | 0.20 |
| Aluminum | 0.60 max. |
| Titanium | 2.40 max. |
| Carbon | 0.06 |
| Boron | 0.005 max. |
| Zirconium | 0.04 max. |
| Aluminum + Titanium | 2.60 |
Creep and Stress Rupture Strength
HAYNES® 263 Alloy Sheet, Age-Hardened*
| Temperature | Creep | Approximate Initial Stress to Produce Specified Creep in | ||||
| 100h | 1,000h | |||||
| °F | °C | % | ksi | MPa | ksi | MPa |
| 1200 | 649 | 1 | 75 | 517 | 58 | 400 |
| R | 77 | 531 | 64 | 441 | ||
| 1300 | 704 | 1 | 54 | 372 | 41 | 283 |
| R | 60 | 414 | 45 | 310 | ||
| 1400 | 760 | 1 | 37 | 255 | 25 | 172 |
| R | 42 | 290 | 28 | 193 | ||
| 1500 | 816 | 1 | 22 | 152 | 12 | 83 |
| R | 25 | 172 | 15 | 103 | ||
| 1600 | 871 | 1 | 11 | 76 | 6.0 | 41 |
| R | 14 | 97 | 7.4 | 51 | ||
| 1700 | 927 | 1 | 5.7 | 39 | 3.0 | 21 |
| R | 7.3 | 50 | 4.0 | 28 | ||
*Samples were age hardened by treating at 1472°F (850°C)/8h/AC
Comparison of Stress to Produce 1% Creep in 1000 Hours in Sheet
At temperatures of 1200°F (649°C) and above, HAYNES® 263 alloy has creep strength less than those of two other gamma-prime strengthened alloys, HAYNES® 282® alloy and HAYNES® Waspaloy alloy. At temperatures greater than 1300°F (704°C), HAYNES® 263 has a creep strength far superior to that of HAYNES® 718 alloy.
Thermal Stability
| Condition | Test Temperature | 0.2% Yield Strength | Ultimate Tensile Strength | 4D Elongation | |||
| °F | °C | ksi | MPa | ksi | MPa | % | |
| Solution Annealed | RT | RT | 58 | 400 | 120.1 | 828 | 53.3 |
| Age Hardened* | RT | RT | 93.1 | 642 | 154.2 | 1063 | 36.9 |
| 1200 | 649 | 78.2 | 539 | 132.3 | 912 | 38.6 | |
| 1400 | 760 | 79.2 | 546 | 100 | 689 | 29.5 | |
| 1500 | 816 | 69.3 | 478 | 77.9 | 537 | 36.9 | |
| 1600 | 871 | 42.2 | 291 | 49.4 | 341 | 61.2 | |
| Age Hardened* + 1200°F/8000h | RT | RT | 113.3 | 781 | 176.8 | 1219 | 28.7 |
| 1200 | 649 | 96.7** | 667** | 149.2** | 1029** | 31.3** | |
| Age Hardened* + 1400°F/8000h | RT | RT | 83.3 | 574 | 151.3 | 1043 | 24.8 |
| 1400 | 760 | 60.9 | 420 | 83.7 | 577 | 36.4 | |
| Age Hardened* + 1500°F/8000h | RT | RT | 77.5 | 534 | 132.8 | 916 | 23 |
| 1500 | 816 | 42 | 290 | 58.6 | 404 | 37 | |
| Age Hardened* + 1600°F/8000h | RT | RT | 54.9 | 379 | 115.7 | 798 | 37.8 |
| 1600 | 871 | 38.4 | 265 | 25.5 | 176 | 49.1 | |
* Samples were age hardened by treating at 1472°F for 8 hours and air cooling.
** Limited data
Tensile Properties
Cold-Rolled Sheet, Solution Treated and Aged
| Test Temperature | 0.2% Yield Strength | Ultimate Tensile Strength | Elongation | |||
| °F | °C | ksi | MPa | ksi | MPa | % |
| RT | RT | 89.2 | 615 | 151.0 | 1041 | 35.8 |
| 400* | 204* | 82.3* | 567* | 139.6* | 963* | 40.9* |
| 800* | 427* | 80.4* | 554* | 126.7* | 874* | 39.6* |
| 1000 | 537 | 76.4 | 527 | 124.8 | 860 | 42.1 |
| 1200 | 649 | 75.2 | 518 | 130.7 | 901 | 36.9 |
| 1400 | 760 | 76.0 | 524 | 100.9 | 696 | 26.6 |
| 1500* | 816* | 68.2* | 470* | 77.3* | 533* | 35.2* |
| 1600 | 871 | 43 | 296 | 50.5 | 348 | 58.1 |
| 1700 | 927 | 17.0 | 117 | 25.0 | 172 | 105.2 |
| 1800 | 982 | 12.3 | 85 | 17.9 | 123 | 95.1 |
| 2000 | 1093 | 5.5 | 38 | 9.0 | 62 | 103.6 |
* Limited data
Mill Annealed +1472°F/8h/Air Cool
Cold-Rolled Plate, Solution Treated and Aged
| Test Temperature | 0.2% Yield Strength | Ultimate Tensile Strength | Elongation | |||
| °F | °C | ksi | MPa | ksi | MPa | % |
| RT | RT | 84.7 | 584 | 147.7 | 1018 | 30.4 |
| 400* | 204* | 74.5* | 514* | 139.6* | 963* | 34.2* |
| 800* | 427* | 70.9* | 489* | 126.8* | 874* | 41.2* |
| 1000 | 537 | 74.3 | 512 | 122.6 | 845 | 42.5 |
| 1200 | 649 | 71.8 | 495 | 125.8 | 867 | 32.7 |
| 1400 | 760 | 72.5 | 500 | 101.9 | 703 | 19.9 |
| 1500* | 816* | 64.1* | 442* | 81.8* | 564* | 22.8* |
| 1600 | 871 | 45.2 | 312 | 53.2 | 367 | 47.5 |
| 1800 | 982 | 12.5 | 86 | 18.8 | 130 | 101.6 |
| 2000 | 1093 | 6 | 41 | 9.1 | 63 | 114.8 |
* Limited data
Mill Annealed +1472°F/8h/Air Cool
Aged Hardness
Age Hardened Room Temperature Hardness
| Form | Hardness |
| Sheet | 26 HRC |
| Plate | 27 HRC |
Mill Annealed +1472°F/8h/Air Cool
HRC = Rockwell Hardness “C”
Oxidation Resistance
Static Oxidation Testing
Environment: Flowing Air
Test Duration: 1,008 h
Number of Cycles: 6
Cycle Length: 168 h
Temperatures: 1600, 1700, 1800°F (871, 927, 982°C)
Metal Loss = (A-B)/2
Average Internal Penetration = C
Maximum Internal Penetration = D
Average Metal Affected = Metal Loss + Average Internal Penetration
Maximum Metal Affected = Metal Loss + Maximum Internal Penetration
Comparative Oxidation Resistance in Flowing Air, 1008 Hours
| Alloy | 1600°F (871°C) | 1700°F (927°C) | 1800°F (982°C) | |||||||||
| Metal Loss | Avg. Met. Aff. | Metal Loss | Avg. Met. Aff. | Metal Loss | Avg. Met. Aff. | |||||||
| mils | μm | mils | μm | mils | μm | mils | μm | mils | μm | mils | μm | |
| 263 | 0.1 | 3 | 0.4 | 10 | 0.2 | 5 | 0.7 | 18 | 0.9 | 23 | 5.0 | 127 |
| 282® | 0.2 | 5 | 0.6 | 15 | 0.1 | 3 | 1.1 | 28 | 0.2 | 5 | 1.8 | 46 |
| R‐41 | 0.2 | 5 | 0.8 | 20 | 0.2 | 5 | 1.5 | 38 | 0.2 | 5 | 2.9 | 74 |
| Waspaloy | 0.3 | 8 | 1.4 | 36 | 0.3 | 8 | 3.4 | 86 | 0.7 | 18 | 5.0 | 127 |
Dynamic Oxidation Testing (Burner Rig)
Burner rig oxidation tests were conducted by exposing, in a rotating holder, samples 0.375 inch x 2.5 inches x thickness (9.5mm x 64mm x thickness) to the products of combustion of fuel oil (2 parts No. 1 and 1 part No. 2), burned at an air to fuel ratio of about 50:1. The gas velocity was about 0.3 mach. Samples were automatically removed from the gas stream every 30 minutes and fan cooled to less than 500°F (260°C) and then reinserted into the flame tunnel.
| Alloy | 1600°F (871°C), 1000 hours, 30 minute cycles | 1800°F (982°C), 1000 hours, 30 minute cycles | ||||||
| Metal Loss, | Avg. Met. Aff. | Metal Loss, | Avg. Met. Aff. | |||||
| mils | μm | mils | μm | mils | μm | mils | μm | |
| 263 | 1.4 | 36 | 4.0 | 102 | 12.5 | 318 | 16.1 | 409 |
| 282® | 1.8 | 46 | 4.2 | 107 | 8.0 | 203 | 13.0 | 330 |
| Waspaloy | 1.9 | 48 | 4.3 | 109 | 9.5 | 241 | 13.6 | 345 |
| R‐41 | 1.2 | 30 | 4.4 | 112 | 5.8 | 147 | 12.1 | 307 |
Physical Properties
| Physical Property | Metric Units | British Units | ||
| Density | RT |
0.302 lb/in3 |
RT |
8.36 g/cm3 |
| Melting Range | 2370-2470°F | – | 1300-1355°C | – |
| Electrical Resistivity | RT | 45.3 µohm-in | RT | 115 µohm-cm |
| 200°F | 45.8 µohm-in | 100°C | 116 µohm-cm | |
| 400°F | 46.5 µohm-in | 200°C | 118 µohm-cm | |
| 600°F | 47.5 µohm-in | 300°C | 120 µohm-cm | |
| 800°F | 48.2 µohm-in | 400°C | 122 µohm-cm | |
| 1000°F | 49.1 µohm-in | 500°C | 124 µohm-cm | |
| 1200°F | 49.6 µohm-in | 600°C | 126 µohm-cm | |
| 1400°F | 49.4 µohm-in | 700°C | 126 µohm-cm | |
| 1600°F | 48.9 µohm-in | 800°C | 125 µohm-cm | |
| 1800°F | 48.9 µohm-in | 900°C | 124 µohm-cm | |
| - | - | 1000°C | 124 µohm-cm | |
| Thermal Conductivity | RT |
81 Btu-in/ft2-hr-°F |
RT | 11.7 W/m-°C |
| 200°F |
89 Btu-in/ft2-hr-°F |
100°C | 13.0 W/m-°C | |
| 400°F |
103 Btu-in/ft2-hr-°F |
200°C | 14.7 W/m-°C | |
| 600°F |
115 Btu-in/ft2-hr-°F |
300°C | 16.3 W/m-°C | |
| 800°F |
128 Btu-in/ft2-hr-°F |
400°C | 18.0 W/m-°C | |
| 1000°F |
141 Btu-in/ft2-hr-°F |
500°C | 19.7 W/m-°C | |
| 1200°F |
154 Btu-in/ft2-hr-°F |
600°C | 21.4 W/m-°C | |
| 1400°F |
167 Btu-in/ft2-hr-°F |
700°C | 23.0 W/m-°C | |
| 1600°F |
182 Btu-in/ft2-hr-°F |
800°C | 24.7 W/m-°C | |
| 1800°F |
195 Btu-in/ft2-hr-°F |
900°C | 26.8 W/m-°C | |
| - | - | 1000°C | 28.5 W/m-°C | |
| Mean Coefficient of Thermal Expansion | 70-200°F | 6.2 µin/in-°F | 25-100°C | 11.1 µm/m- °C |
| 70-400°F | 6.7 µin/in-°F | 25-200°C | 12.1 µm/m- °C | |
| 70-600°F | 7.1 µin/in-°F | 25-300°C | 12.7 µm/m- °C | |
| 70-800°F | 7.2 µin/in-°F | 25-400°C | 12.8 µm/m- °C | |
| 70-1000°F | 7.6 µin/in-°F | 25-500°C | 13.6 µm/m- °C | |
| 70-1200°F | 7.9 µin/in-°F | 25-600°C | 13.9 µm/m- °C | |
| 70-1400°F | 8.3 µin/in-°F | 25-700°C | 14.7 µm/m- °C | |
| 70-1600°F | 9.0 µin/in-°F | 25-800°C | 15.4 µm/m- °C | |
| 70-1800°F | 9.9 µin/in-°F | 25-900°C | 17.0 µm/m- °C | |
| - | - | 25-1000°C | 18.1 µm/m- °C | |
| Dynamic Modulus of Elasticity | RT |
32.1 x 106 psi |
RT | 221 GPa |
| 200°F |
31.7 x 106 psi |
100°C | 219 GPa | |
| 400°F |
30.7 x 106 psi |
200°C | 212 GPa | |
| 600°F |
29.6 x 106 psi |
300°C | 205 GPa | |
| 800°F |
28.5 x 106 psi |
400°C | 198 GPa | |
| 1000°F |
27.5 x 106 psi |
500°C | 192 GPa | |
| 1200°F |
26.2 x 106 psi |
600°C | 185 GPa | |
| 1400°F |
24.8 x 106 psi |
700°C | 176 GPa | |
| 1600°F |
22.9 x 106 psi |
800°C | 166 GPa | |
| 1800°F |
21.1 x 106 psi |
900°C | 154 GPa | |
| - | - | 1000°C | 143 GPa | |
RT= Room Temperature
Low Cycle Fatigue
Comparative Low-Cycle Fatigue Data
Fabrication and Welding
Fabrication
HAYNES® 263 alloy has excellent forming and welding characteristics. The hot working temperature range for the alloy is approximately 1750 to 2150°F (954- 1177°C). The alloy has excellent ductility in the annealed condition, and thus may also be formed by cold working. Intermediate annealing in the temperature range from 1900 to 2000°F (1038 to 1093°C) may be needed for complex component forming operations. All hot- or cold-worked parts should be annealed and rapidly cooled in order to restore the best balance of properties.
Welding
For welding HAYNES® 263 alloy, please review the General Welding and Joining Guidelines. In addition to those guidelines, there are some additional considerations when welding 263 alloy.
HAYNES® 263 alloy is a precipitation-strengthened alloy and requires a postweld heat treatment (PWHT) to develop suitable properties. Postweld heat treatment for 263 alloy consists of two parts: a solution anneal, which is followed by a suitable aging treatment. Details can be found here. During PWHT, the gamma-prime phase (Ni3Al,Ti) precipitates and the alloy undergoes a slight volumetric contraction. This makes it susceptible to strain-age cracking, which typically occurs upon heating to the solution annealing temperature. To inhibit strain-age cracking, the heating rate to the solution annealing temperature should be as fast as possible, within the capability of the furnace being used.
Filler metal of matching composition is suggested for welding 263 alloy to itself. For filler metal suggestions for welding 263 alloy to other alloys, please refer to the Haynes Welding SmartGuide, or contact Haynes International for further guidance.
Tensile Properties of Solution Annealed 263 at Room Temperature
| Ultimate Tensile Strength | Yield Strength | Elongation | |||
| ksi | MPa | ksi | MPa | % | |
| Sheet | 116.9 | 806 | 49.1 | 339 | 57.5 |
| Plate | 115.6 | 797 | 47.7 | 329 | 59.3 |
Solution Annealed Room Temperature Hardness
| Form | Hardness | Typical ASTM Grain Size |
| Sheet | 98 HRBW | 5 – 7.5 |
| Plate | 31 HRC | 4 – 6 |
All samples tested in solution-annealed condition.
HRBW = Hardness Rockwell “B”, Tungsten Indentor.
HRC = Hardness Rockwell “C”.
Heat Treatment
Wrought HAYNES® 263 alloy is furnished in the solution heat-treated condition unless otherwise specified. The alloy is normally solution heat-treated in the range of 1900 – 2150°F (1038 – 1177°C) and rapidly cooled or water quenched for optimal properties. Following solution heat treatment, the alloy is age-hardened at 1475°F (802°C) for eight hours, and air-cooled.
Specifications
Specifications
| HAYNES® 263 alloy (N07263) | |
| Sheet, Plate & Strip | AMS 5872 |
| Biller, Rod & Bar | AMS 5886 |
| Coated Electrodes | – |
| Bare Welding Rods & Wire | AMS 5966 |
| Seamless Pipe & Tube | – |
| Welded Pipe & Tube | – |
| Fittings | – |
| Forgings | AMS 5886 |
| DIN | – |
| Others | – |
Disclaimer
Haynes International makes all reasonable efforts to ensure the accuracy and correctness of the data displayed on this site but makes no representations or warranties as to the data’s accuracy, correctness or reliability. All data are for general information only and not for providing design advice. Alloy properties disclosed here are based on work conducted principally by Haynes International, Inc. and occasionally supplemented by information from the open literature and, as such, are indicative only of the results of such tests and should not be considered guaranteed maximums or minimums. It is the responsibility of the user to test specific alloys under actual service conditions to determine their suitability for a particular purpose.
For specific concentrations of elements present in a particular product and a discussion of the potential health affects thereof, refer to the Safety Data Sheets supplied by Haynes International, Inc. All trademarks are owned by Haynes International, Inc., unless otherwise indicated.
Alloy Brochure