Principal Features

HAYNES® Waspaloy alloy (UNS N07001) is an age-hardenable, nickel-based superalloy with very good strength at temperatures up to about 1800°F (980°C). It is widely used as a wrought material for forged and fabricated gas turbine and aerospace components. Its strength is generally comparable to HAYNES® R-41 alloy, and is superior to that of alloy 718 at temperatures above 1200-1300°F (650-705°C). Waspaloy alloy can be cold-formed in the annealed condition, and may also be hot-formed at temperatures of 1900°F (1040°C) or above. Weldability us somewhat limited by susceptibility to strain age cracking under conditions of heavy restraint. The alloy exhibits good resistance to gas turbine combustion environments at temperatures up to about 1600°F (870°C).  Waspaloy alloy is now being replaced in many applications by HAYNES® 282® alloy, due to the superior fabricability and creep-strength of 282® alloy.

*Please contact our technical support team if you have technical questions about this alloy.

Nominal Composition

Weight %
Nickel 58 Balance
Cobalt 13.5
Iron 2 max.
Chromium 19.0
Molybdenum 4.3
Aluminum 1.5
Titanium 3.0
Carbon 0.08
Manganese 0.1 max.
Silicon 0.15 max.
Boron 0.006
Zirconium: 0.05

Heat Treatment

Wrought HAYNES® Waspaloy alloy is furnished in the solution annealed condition unless otherwise specified. After component fabrication, the alloy would normally again be solution annealed at 1950 to 2000°F (1066 to 1093°C) for a time commensurate with section thickness and rapidly cooled or water-quenched for optimal properties. Following solution annealing, the alloy is given a three-step age-hardening treatment to optimize the microstructure and induce age-hardening. The first step is 1825°F (996°C) for 2 hours followed by air cooling. The second step is 1550°F (843°C) for 4 hours followed by air cooling.  The final step is 1400°F (760°C) for 16 hours followed by air cooling.

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

Typical Tensile Properties

HAYNES® Waspaloy alloy Typical Tensile Properties

Test Temperature 0.2% Yield Strength Ultimate Tensile Strength 4D Elongation
°F °C ksi MPa ksi MPa %
RT RT 130.4 899 189.2 1304 24.5
400 204 118.9* 820* 183.2* 1263* 24.4*
800 427 120.4* 830* 171.6* 1183* 22.6*
1000 538 117.8 812 170.4 1175 22.0
1200 649 113.8 784 164.9 1137 31.9
1400 760 102.4 706 119.2 822 32.8
1500 816 75.0 517 91.9 633 39.7
1600 871 51.8 357 66.2 456 48.0
1700 927 30.5 210 43.1 297 57.7
1800 982 19.2 132 25.2 174 57.8
2000 1093 4.5* 31* 7.4* 51* 135.5*

* Limited data
Samples were age hardened by treating at 1825°F (995°C)/2 Hr./AC + 1550°F (845°C)/4 Hr./AC + 1400°F (760°C)/16 Hr./AC

Thermal Stability

HAYNES® Waspaloy 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 64.3 443 128.8 888 50.1
Age Hardened* RT RT 129.4 892 189.9 1309 24.9
1200 649 114 786 166.1 1145 31.8
1400 760 103.7 715 119.6 825 34.5
1500 816 75.9 523 92.1 635 40.6
1600 871 52.6 363 66.9 461 45.7
Age Hardened* + 1200°F/8000h RT RT 137.8 950 197 1358 21.8
1200 649 120.7 832 171.3 1181 29.7
Age Hardened* + 1400°F/8000h RT RT 115.2 794 178.2 1229 19
1400 760 80.2 553 110.3 760 32.1
Age Hardened* + 1500°F/8000h RT RT 93.2 643 160.4 1106 22.2
1500 816 51.1 352 79.9 551 31.3
Age Hardened* + 1600°F/8000h RT RT 66 455 115.7 798 13
1600 871 30.5 210 49.9 344 29.2

*Samples were age hardened by treating at 1825°F (995°C)/2 Hr./AC + 1550°F (845°C)/4 Hr./AC + 1400°F (760°C)/16 Hr./AC

Creep and Stress-Rupture Strength

HAYNES® Waspaloy Sheet, Age Hardened*

HAYNES® Waspaloy alloy Creep and Stress-Rupture Strength HAYNES® Waspaloy Sheet, Age Hardened*

Temperature Creep Approximate Initial Stress to Produce Specified Creep in
100h 1000h
°F °C % ksi MPa ksi MPa
1200 649 1 81 558 67 462
R 92 634 80 552
1300 704 1 63 434 46 317
517 57 393 57 393
1400 760 1 41 283 28 193
365 35 241 35 241
1500 816 1 25 172 16 110
221 20 138 20 138
1600 871 1 15 103 7.0 48
131 10 69 10 69
1700 927 1 6.4 44 3.0 21
69 4.8 33 4.8 33

*Samples were age hardened by treating at 1825°F (995°C)/2 Hr./AC + 1550°F (845°C)/4 Hr./AC + 1400°F (760°C)/16 Hr./AC

Physical Properties

Physical Property British Units Metric Units
Density RT
0.296 lb/in3
RT
8.20 g/cm3
Melting Temperature 2425-2475°F - 1330-1360°C -
Thermal Conductivity 400°F
88 Btu-in/ft2-hr-°F
200°C 12.6 W/m-°C
800°F
112 Btu-in/ft2-hr-°F
400°C 15.7 W/m-°C
1000°F
125 Btu-in/ft2-hr-°F
600°C 19.1 W/m-°C
1200°F
139 Btu-in/ft2-hr-°F
700°C 20.9 W/m-°C
1400°F
152 Btu-in/ft2-hr-°F
800°C 22.7 W/m-°C
1600°F
167 Btu-in/ft2-hr-°F
900°C 24.5 W/m-°C
Mean Coefficient of Thermal Expansion 70-800°F 7.6 µin/in -°F 20-500°C
13.9 x 10-6m/m·°C
70-1000°F 7.8 µin/in -°F 20-600°C
14.3 x 10-6m/m·°C
70-1200°F 8.1 µin/in -°F 20-700°C
14.8 x 10-6m/m·°C
70-1400°F 8.4 µin/in -°F 20-800°C
15.4 x 10-6m/m·°C
70-1600°F 8.9 µin/in -°F 20-900°C
16.4 x 10-6m/m·°C
70-1800°F 9.7 µin/in -°F 20-1000°C
17.8 x 10-6m/m·°C
Dynamic Modulus of Elasticity 70°F
30.9 x 106 psi
20°C 213 GPa
400°F
29.5 x 106 psi
200°C 204 GPa
800°F
27.7 x 106 psi
400°C 192 GPa
1000°F
26.7 x 106 psi
600°C 180 GPa
1200°F
25.6 x 106 psi
700°C 172 GPa
1400°F
24.3 x 106 psi
800°C 164 GPa
1600°F
22.9 x 106 psi
900°C 155 GPa
1800°F
21.1 x 106 psi
1000°C 146 GPa

RT= Room Temperature

Low Cycle Fatigue

Comparative Low-Cycle Fatigue Data

Fabrication

Solution Annealed Room Temperature Hardness

Form Hardness Typical ASTM Grain Size
Sheet 93 HRBW 5-6.5
Plate 29 HRC 5.5 – 6.5

All samples tested in solution-annealed condition
HRBW = Hardness Rockwell “B”, Tungsten Indentor.
HRC = Hardness Rockwell “C”.

Waspaloy, Solution Annealed, Room Temperature Tensile

Form Test Temperature 0.2% Yield Strength Ultimate Tensile Strength 4D Elongation
°F °C ksi MPa ksi MPa %
Sheet RT RT 60.8 419 131.9 909 52.2
Plate RT RT 87.6 604 154.7 1067 42.3

Welding

For welding HAYNES® Waspaloy alloy, please review the General Welding and Joining Guidelines.  In addition to those guidelines, there are some additional considerations when welding Waspaloy alloy.

HAYNES® Waspaloy alloy is a precipitation-strengthened alloy and requires a postweld heat treatment (PWHT) to develop suitable properties.  Postweld heat treatment for Waspaloy alloy consists of two parts:  a solution anneal, which is followed by a three-step 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 Waspaloy alloy to itself.  For filler metal suggestions for welding Waspaloy alloy to other alloys, please refer to the Haynes Welding SmartGuide, or contact Haynes International for further guidance.

Specifications and Codes

Specifications

HAYNES® Waspaloy alloy (N07001)
Sheet, Plate & Strip AMS 5544
Billet, Rod & Bar AMS 5704 AMS 5706 AMS 5707 SB 637/B 637
Coated Electrodes -
Bare Welding Rods & Wire AMS 5828
Seamless Pipe & Tube -
Welded Pipe & Tube -
Fittings -
Forgings AMS 5704 AMS 5706 AMS 5707 SB 637/ B637
DIN -
Others -

 

Codes

HAYNES® Waspaloy alloy (N07001)
MMPDS  6.3.8

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

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