Since the company was founded, Haynes International has played a key role in the development of the aerospace industry. During World War I, Haynes STELLITE® alloy cutting tools proved to be vital in meeting the increased production of military aircraft engines. In the 1930s, engine exhaust valves were hard-faced with Haynes cobalt-base STELLITE® alloys, to provide the increased reliability and power demanded by the new, higher horsepower engines. During World War II, Haynes again played a vital role, supplying over 25 million STELLITE® investment cast blades or “buckets” used in aircraft engine superchargers.
After WWII, with the dawning of the “jet age” and the increasing demand for high-temperature alloys, Haynes focused its attention on the development and manufacture of wrought nickel and cobalt alloys. In 1949, MULTIMET® alloy was introduced, followed by cobalt alloy HAYNES®25 alloy in 1950, and HASTELLOY®X alloy in 1952. All three alloys are still being used in the aerospace industry today.
Today, Haynes remains active in the development and manufacture of high-temperature wrought nickel-base and cobalt-base superalloys to meet the demanding service requirements of the aerospace industry. Our products are used in parts for almost every commercial airplane, in many military aircraft, as well as aboard vehicles exploring the frontiers of space. We are committed to delivering the highest quality products, solutions, and service that the aerospace industry demands. Haynes alloys are used in a wide variety of structural aero-engine components. Some typical applications are shown below.
Applications for Our Alloys in Hot-section Components
Cases, Rings, Seals, Shrouds, Diffusers, Nozzles, Combustors, Fuel Systems, Flameholders, Manifolds, Exhaust Structures, Exhaust Ducts / Nozzles, Tail Cones, and Augmentors / Afterburners
Applications for Our Alloys in Other Components
Bleed Air Systems, Heat Shields, Fasteners, Honeycomb Seals, and Hydraulic Lines
Our Aerospace Alloys:
HAYNES® 25 alloy
HAYNES® 25 alloy offers excellent strength, good oxidation resistance to 1800°F (980°C), and relatively good resistance to wear and galling. Used in gas turbine parts.
HAYNES® 75 alloy
HAYNES® 75 alloy is a basic heat-resistant alloy used in low-stress gas turbine and industrial applications.
HAYNES® 188 alloy
HAYNES® 188 alloy is a cobalt-nickel-chromium-tungsten alloy that offers excellent high-temperature strength and superior oxidation resistance up to 2000°F (1095°C) and thermal stability. This alloy is used extensively in demanding military and civil aircraft gas turbine engine combustors, transition ducts, and after-burner components.
HAYNES® 214® alloy
HAYNES® 214® alloy is a nickel-chromium-aluminum-iron alloy designed to provide the optimum high-temperature oxidation resistance for a wrought material, while at the same time allowing for conventional forming and joining. This alloy offers outstanding oxidation resistance to 2300°F (1260°C) and is used in demanding, specialized gas turbine parts, such as honeycomb seals combustor splash plates and other static oxidation-limited parts.
HAYNES® 230® alloy
HAYNES® 230® alloy is a nickel-chromium-tungsten-molybdenum alloy that offers the best combination of high- temperature strength, resistance to oxidizing environments up to 2100°F (1149°C) for prolonged exposures, excellent long-term thermal stability, and fabricability of any major high-temperature alloy. It is used for combustion cans, transition ducts, flame holders, thermocouple sheaths, and other important gas turbine components.
HAYNES® 233® Alloy
Haynes International, Inc. is pleased to announce the development of HAYNES® 233™ alloy. This alloy is expected to have exceptional oxidation resistance coupled with superior creep strength at temperatures up to 2100°F (1149°C), or higher – a combination of properties never before achieved in a readily fabricable alloy. Potential applications include hot gas components in aerospace and industrial gas turbines. Material for trial evaluation are available in several product forms.
HAYNES® 242® alloy
HAYNES® 242® alloy is an age-hardenable, nickel-molybdenum-chromium alloy which derives its strength from a long-range ordering reaction upon aging. This alloy offers excellent strength to 1300°F (705°C), low thermal expansion characteristics, good oxidation resistance up to 1500°F (815°C), excellent low-cycle fatigue properties, very good thermal stability, and fabricability. It is used in gas turbine seal rings, containment, and high-strength fasteners.
HAYNES® 244® alloy
HAYNES® 244® alloy is a new, age-hardenable, nickel-molybdenum-chromium-tungsten alloy with an extended operating temperature range to 1400°F (760°C). This alloy offers improved yield strength and creep rupture strength, versus HAYNES® 242® alloy, as well as a lower thermal expansion. Additionally, the alloy has excellent low-cycle fatigue and good oxidation resistance. The higher strength and lower thermal expansion provides better dimensional control, sealing, and containment characteristics for aero engine designers.
HAYNES® 263 alloy
HAYNES® 263 alloy is a gamma-prime strengthened, age-hardenable alloy with good strength in the 1000-1400°F (540-760°C) temperature range and excellent forming and welding characteristics.
HAYNES® 282® alloy
HAYNES® 282® alloy is a new, wrought, gamma-prime strengthened superalloy developed for high-temperature structural applications, especially those in aero and industrial gas turbine engines. It possesses a unique combination of creep strength, thermal stability, weldability, and fabricability not found in currently available commercial alloys. This new alloy has excellent creep strength in the temperature range of 1200 to 1700°F (649° to 927°C), surpassing that of Waspaloy alloy and approaching that of R-41 alloy. The features of this alloy make it suitable for critical gas turbine applications, such as sheet fabrications, forged rings and cases, exhaust and nozzle structures, and other hot-gas-path components.
HAYNES® 617 alloy
HAYNES® 617 alloy is widely used in gas turbines for combustion cans, ducting and transitions.
HAYNES® 625 / 625SQ® alloy
HAYNES® 625 and 625SQ® alloys are used in wide variety of aerospace components. The 625SQ® alloy grade offers improved LCF properties for bellows type applications.
HAYNES® 718 alloy
HAYNES® 718 alloy is an age-hardenable alloy with excellent strength to 1200°F (650°C). Used extensively in gas turbine components.
HAYNES® HR-224® alloy
HAYNES® HR-224® is new alloy with excellent oxidation resistance to 2200°F (1204°C), with improved fabricability and weldability compared to HAYNES® 214® alloy. Used in demanding industrial heating applications and steam reformer parts.
MULTIMET® alloy
Predecessor of 556® alloy (UNS R30155, W73155), used extensively in older aircraft gas turbines.
HAYNES® R-41 alloy
HAYNES® R-41 alloy is a gamma-prime strengthened, age-hardenable alloy with excellent strength in the 1000-1650°F (540-900°C) temperature range. Used for critical gas turbine engine components.
HASTELLOY® S alloy
HASTELLOY® S alloy offers excellent thermal stability, good thermal fatigue resistance, good oxidation-resistance and relatively low expansion characteristics. Used in low-stress gas turbine parts.
HAYNES® Waspaloy alloy
HAYNES® Waspaloy alloy is a gamma-prime strengthened, age-hardenable alloy with very good strength in the 1000-1650°F (540-900°C) temperature range. Widely used for forged and fabricated gas turbine and aerospace components.
HASTELLOY® W alloy
HASTELLOY® W alloy is excellent for welding dissimilar high-temperature alloys. Used extensively in aircraft engine repair and maintenance.
HASTELLOY® X alloy
HASTELLOY® X alloy is a nickel-chromium-iron-molybdenum alloy that has been in service in aerospace applications for nearly 50 years. The alloy offers very good balance of high-temperature strength, oxidation resistance, and fabricability. This alloy is widely used for aircraft and industrial gas turbine engine fabricated combustor and exhaust components, such as transition ducts, combustor cans, spray bars and flame holders, afterburners, and tailpipes.
HAYNES® Ti-3Al-2.5-V alloy
HAYNES® Ti-3Al-2.5-V alloy was developed for aircraft hydraulic and fuel systems transmission lines, primarily because of its high strength-to-weight ratio. This ratio proves to be a major advantage when used for hydraulic tubing lines to provide required strength levels, but more importantly, reducing weight by as much as 43% when compared to stainless steel.