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What is Waspalloy?

Waspalloy is a superalloy developed by the U.S. Navy in the late 1950s, and it has since emerged as a popular material for components requiring superior strength, tensile ductility, and corrosion resistance at elevated temperatures. Waspalloy mainly consists of nickel (47-51%), cobalt (16-20%), chromium (7-9%), molybdenum (7-10%) and iron (12-22%). It contains aluminium (5%) and titanium (3%). The additions of chromium provide excellent oxidation resistance, while aluminium gives excellent softening resistance under temperature-stress situations. Molybdenum provides solid solution hardening for high-temperature strength, while cobalt promotes cohesive strength between grains of matrix crystals. Finally, iron adds to the creep rupture properties of was alloy at elevated temperatures up to 1300°F/700°C.

Applications of Waspalloy

Waspalloy is a nickel-based superalloy with excellent mechanical and corrosion resistance properties. It has numerous industrial applications, including aerospace components, chemical plant equipment, valves for high-temperature service in oil refineries, weld overlay cladding of steel pipe in nuclear reactors, and gas turbine blades operating at temperatures of up to 1120°C (2048°F). Waspalloy also offers superior stress corrosion cracking resistance, which makes it well-suited for use in nuclear core components exposed to sustained radiation. In addition to its strength and durability, Waspalloy also provides extremely good weldability characteristics, making it a valuable option for manufacturing processes requiring welding.

Physical properties of Waspalloy

Waspalloy is an age-hardenable, nickel-base superalloy composed of iron, cobalt, chromium, molybdenum and tungsten. This alloy exhibits superior mechanical properties at elevated temperatures and high corrosion resistance against oxidizing environments. It is commonly used in aircraft engine parts due to its excellent performance in extreme conditions.

Density: 0.296 lbs/in3, 8.20 g/cm3

Mean Coefficient of Thermal Expansion: µin/in-°F (µm/m-°C)
70 - 800 °F (20 - 500 °C): 7.6 (13.9)
70 - 1000 °F (20 - 600 °C): 7.8 (14.3)
70 - 1200 °F (20 - 700 °C): 8.1 (14.8)
70 - 1400 °F (20 - 800 °C): 8.4 (15.4)
70 - 1600 °F (20 - 900 °C): 8.9 (16.4)
70 - 1800 °F (20 - 1000 °C): 9.7 (17.8)

Thermal Conductivity: BTU-in/ft-°F (W/m-°K)
70 °F (21 °C): 79 (11)
800 °F (427 °C): 113 (16)
1200 °F (649 °C): 138 (20)
1500 °F (816 °C): 160 (23)
1800 °F (982 °C): 182 (26)

Modulus of Elasticity, ksi (MPa)
30.9 x 103 (213 x 103) in tension

Melting Point: 2425 - 2475 °F (1330 - 1357 °C)

Mechanical Properties of Waspalloy

Waspalloy is a nickel-based superalloy noted for its high strength and temperature resistance, good flexibility, excellent corrosion and oxidation resistance, and good weldability. It outperforms typical heat-resistant stainless steels in many applications.

Ultimate Tensile Strength:

Gauges 0.012 inches and under (0.30 mm): 150 KSI max (1035 MPa max)

Yield Strength (0.2% offset):

Gauges 0.012 inches and under (0.30 mm): 85 KSI max (586 MPa max)

Elongation: 25% min

Hardness: B 100 max

Chemical composition of Waspalloy

Waspalloy is a nickel-based superalloy that performs in extreme temperatures and corrosive environments. It contains 20-25% chromium, 17-21% cobalt, 8-10% molybdenum, 4.5-5.5% tungsten, 0.2-0.3% carbon, 1.8-2.3 manganese, and the balance is nickel alloyed with minor amounts of iron and other elements such as silicon and vanadium to enhance strength and toughness at high temperatures.

What is Waspaloy material?

Waspaloy is a nickel-based alloy known for its high corrosion and temperature resistance, making it ideal for use in aircraft engine components.

What is Waspaloy used for?

Waspaloy is an age-hardenable superalloy designed for high-temperature applications, often used in jets and industrial gas turbines.

What is the hardness of Waspaloy material?

Waspaloy hardness is typically measured by the Rockwell C-scale, and ranges from 40 to 50 HRC.

What is the microstructure of Waspaloy?

Waspaloy is an age-hardenable superalloy composed of nickel, cobalt, chromium and molybdenum with small amounts of aluminium or titanium. It has excellent creep strength and flexibility.

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