Haynes International. Synonymous with high-performance alloys.

Our broad alloy portfolio enables customers to achieve higher efficiencies, reduce pollution levels, extend product life, and reduce costs. Our corrosion-resistant alloys are generally distinguished by the HASTELLOY® brand and our high-temperature family of alloys are generally distinguished by the HAYNES® brand. Industries often specify alloys by a UNS designation, unaware that such alloy specifications only address issues of chemical composition, not corrosion or heat resistance. We protect the alloys’ quality and assure their performance by focusing on precise control of chemical composition and thermo-mechanical processing, in addition to systematic testing. In our world, there’s no room for almost.

High-temperature Alloys

The aircraft gas turbine engine market has traditionally been the major user of HASTELLOY® and HAYNES® High-temperature alloys. Here the story has been one of incremental growth as each major advance in engine performance capitalizes on the development of newer and more efficient materials of construction.

MULTIMET® alloy was the first significant wrought HAYNES® high-temperature alloy offered to the aviation industry in the 1950’s. HASTELLOY® X alloy, the next major development is still a “workhorse” of the industry. HAYNES® 188 alloy later offered engine designers a much higher temperature advantage. HAYNES® 230® alloy has gained increased use because of its unexcelled combination of high-temperature strength and oxidation resistance plus improved thermal stability. HAYNES® 242® alloy shows great promise for aircraft engine seal rings, containment rings, duct segments, casings and fasteners. The newest HAYNES® 282® alloy combines exceptional high temperature properties with good weldability and fabricability.

Outside of the aircraft industry, high performance, heat-resistant alloys offer properties never before available. Because of its superior oxidation resistance through 2200°F (1204°C), HAYNES® 214® alloy is gaining more and more applications in the ceramics, metalworking, automotive and electronics industries for “clean firing.”

HAYNES® 556® and HR-160® alloys have very good resistance in waste disposal and fossil energy production because of their superior resistance to oxidation, sulfidation and molten salt attack.

HAYNES® HR-120®, 230® and 556® alloys are providing cost-effective solutions to many maintenance problems in the heat-treating and industrial heating industries because of their superior properties.

High-temperature Alloys


HAYNES® 25 alloy
HAYNES® 25 alloy (UNS R30605) 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 (UNS N06075) is a basic heat-resistant alloy used in low-stress gas turbine and industrial applications.
HAYNES® 188 alloy
HAYNES® 188 alloy (UNS R30188) 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 (UNS N07214) 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 (UNS N06230) 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® 233® alloy is a new Ni-Co-Cr-Mo-Al alloy that offers excellent oxidation resistance at temperatures up to 2100°F (1149°C) or higher coupled with superior creep strength – a combination of properties never before achieved in a readily fabricable alloy. The alloy obtains its exceptional oxidation resistance through the formation of a protective alumina scale. Potential applications include hot gas components in aerospace and industrial gas turbines, industrial heating fixtures and sensors, and various structural components in the emerging technology market.
HAYNES® 242® alloy
HAYNES® 242® alloy (UNS N10242) 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 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 (UNS N07263) 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 (UNS N07208) is a 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. Vacuum-melted castings and additive manufactured powder components have also been successfully produced and used.
HAYNES® 556® alloy
HAYNES® 556® alloy (UNS R30556) is a high-strength alloy with broad spectrum of resistance to high-temperature corrosive environments. Used in waste incineration, heat-treating, calcining, chemical processing, galvanizing, refinery, boiler and gas turbine components of various types. Excellent fabricability and excellent as a dissimilar filler metal for welding nickel or cobalt alloys to iron-base alloys.
HAYNES® 617 alloy
HAYNES® 617 alloy (UNS N06617) is widely used in gas turbines for combustion cans, ducting and transitions.
HAYNES® 625 alloy
HAYNES® 625 and 625SQ® alloys (UNS N06625, UNS N06626)  are used in wide variety of aerospace components. The 625SQ® alloy grade offers improved LCF properties for bellows type applications.
HAYNES® 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 (UNS N07718) is an age-hardenable alloy with excellent strength to 1200°F (650°C). Used extensively in gas turbine components.
HAYNES® HR-120® alloy
HAYNES® HR-120® alloy (UNS N08120) is a high-strength economical alloy, with good resistance to industrial environments. Designed for use in heat treating fixture and industrial heating applications as an upgrade from 330 alloy, 800H alloy and stainless steels. Excellent carburization and sulfidation resistance.
HAYNES® HR-160® alloy
HAYNES® HR-160® alloy (UNS N12160) has outstanding resistance to sulfidation and other high-temperature aggressive environments. Used in waste incineration, boiler, high-temperature reaction vessel and rotary calciner applications.
HAYNES® HR-224® alloy
HAYNES® HR-224® alloy is a 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.
HAYNES® HR-235® alloy
HAYNES® HR-235® alloy is a high-chromium, copper-bearing nickel alloy that has excellent resistance to metal dusting in carbonaceous high-temperature environments. Potential uses include applications in petrochemical production and syngas plants. Similar to other nickel-based corrosion resistant alloys, the alloy is readily fabricated and welded.
Predecessor of 556® alloy (UNS R30155, W73155), used extensively in older aircraft gas turbines.
HAYNES® NS-163® alloy
HAYNES® NS-163® alloy is a wrought cobalt-based alloy for use in sheet and wire forms.
HAYNES® R-41 alloy
HAYNES® R-41 alloy (UNS N07041) 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 (UNS N06635) offers excellent thermal stability, good thermal fatigue resistance, good oxidation-resistance and relatively low expansion characteristics. Used in low-stress gas turbine parts.
HASTELLOY® W alloy (UNS N10004) is excellent for welding dissimilar high-temperature alloys. Used extensively in aircraft engine repair and maintenance.
HAYNES® Waspaloy alloy
HAYNES® Waspaloy alloy (UNS N07001) 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® X alloy (UNS N06002, W86002) 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® X-750 alloy
HAYNES® X-750 alloy (UNS N07750) is an age-hardenable alloy with good strength to 1500°F (815°C).

Corrosion-resistant Alloys

The Corrosion-resistant HASTELLOY® alloys are widely used by the chemical processing industries. The need for reliable performance leads to their acceptance and growth in the areas of energy, health and environmental, oil and gas, pharmaceutical and flue gas desulfurization industries. The attributes of HASTELLOY® alloys include high resistance to uniform attack, outstanding localized corrosion resistance, excellent stress corrosion cracking resistance, and ease of welding and fabrication.

B-3® alloy possesses outstanding resistance to non-oxidizing acids, such as hydrochloric acid and sulfuric acid. The advantages of B-3® alloy over previous B-family alloys are enhanced thermal stability and improved fabrication characteristics. A new alloy, HASTELLOY® HYBRID-BC1® alloy will handle stronger non-oxidizing acids than C-type alloys and will tolerate oxidizing impurities that B-type alloys will not.

The most versatile of the HASTELLOY® alloys are the “C-type” alloys. C-2000® alloy combines outstanding resistance to oxidizing media with superior resistance to non-oxidizing environments and represents a true performance breakthrough for chemical process equipment applications. C-22® alloy is particularly resistant to pitting and crevice corrosion; it has been used extensively to protect against the most corrosive FGD systems and the most sophisticated pharmaceutical reaction vessels.

G-30® alloy has been very successful as phosphoric acid heat exchanger tubing and for other process components in the fertilizer industry. G-35® alloy was designed as an improved version of G-30® alloy in these applications.  The high chromium content of both of these alloys make them the premier choices for strong oxidizing solutions and mixed acid pickling services.

Corrosion-resistant Alloys


HASTELLOY® B-3® alloy
HASTELLOY® B-3® alloy (UNS N10675) exhibits extremely high resistance to pure hydrochloric, hydrobromic, and sulfuric acids. Furthermore, it has greatly improved structural stability compared with previous B-type alloys, leading to fewer concerns during welding, fabrication, and service.
HASTELLOY® C-4 alloy
HASTELLOY® C-4 alloy (UNS N06455) is the most (microstructurally) stable of the widely used nickel-chromium-molybdenum materials, which are well known for their resistance to many aggressive chemicals, in particular hydrochloric acid, sulfuric acid, and chlorides. This stability means that the alloy can be welded without fear of sensitization, i.e. the nucleation and growth of deleterious, second phase precipitates in the grain boundaries of the weld heat-affected zone (HAZ).
HASTELLOY® C-22® alloy
HASTELLOY® C-22® alloy (UNS N06022) is one of the well-known and well-proven nickel-chromium-molybdenum materials, the chief attributes of which are resistance to both oxidizing and non-oxidizing chemicals, and protection from pitting, crevice attack, and stress corrosion cracking. Its high chromium content provides much higher resistance to oxidizing media than the family standard, C-276 alloy, and imparts exceptional resistance to chloride-induced pitting, an insidious and unpredictable form of attack, to which the stainless steels are prone.
HASTELLOY® C-22HS® alloy
HASTELLOY® C-22HS® alloy (N07022) is a versatile nickel-chromium-molybdenum alloy with excellent resistance to both oxidizing and reducing acids and which can be heat treated to obtain very high strength. Used in the oil & gas industry in bar, billet, tube and pipe product forms for applications that require very high strength and superior corrosion resistance. This alloy, especially suited for high-temperature, high-pressure wells, is capable of being produced at significantly higher strength levels than other nickel base alloys. It is qualified to NACE MRO175/ISO 15156 Level VII environment with 5 g/l elemental sulfur to 401ºF (205ºC) and modified NACE Level VII, 25% NaCl+1000 psi (7000 kPa) CO2 + 1000 psi (7000 kPa) H2S at 550ºF (288ºC) the highest level in the specification. The maximum hardness and yield strength covered is HRc43 and 205 ksi.
HASTELLOY® C-276 alloy
HASTELLOY® C-276 alloy (UNS N10276) is the first wrought, nickel-chromium-molybdenum material to alleviate concerns over welding (by virtue of extremely low carbon and silicon contents). As such, it was widely accepted in the chemical process and associated industries, and now has a 50-year-old track record of proven performance in a vast number of corrosive chemicals.
HASTELLOY® C-2000® alloy
HASTELLOY® C-2000® alloy (UNS N06200) is unique among the versatile nickel-chromium-molybdenum materials in having a deliberate copper addition. This provides greatly enhanced resistance to sulfuric acid. It also has a high chromium content, to maximize its resistance to oxidizing chemicals and process streams contaminated with ferric ions and dissolved oxygen.
HASTELLOY® G-30® alloy
HASTELLOY® G-30® alloy (UNS N06030) is a nickel-chromium-iron material highly resistant to “wet process” phosphoric acid (P2O5).  P2O5 is one of the most important industrial chemicals, being the primary source of phosphorus for agrichemical fertilizers. G-30® alloy is also moderately resistant to chloride-induced localized attack. Furthermore, G-30® alloy is less susceptible to chloride-induced stress corrosion cracking than the stainless steels.
HASTELLOY® G-35® alloy
HASTELLOY® G-35® alloy (UNS N06035) was developed to resist “fertilizer-grade” phosphoric acid (P2O5), which is used in the production of fertilizers. Tests in real-world solutions indicate that G-35® alloy is far superior to other metallic materials in this acid. It was also designed to resist localized attack in the presence of chlorides, since this can be a problem beneath deposits in evaporators used to concentrate “fertilizer-grade” phosphoric acid. Furthermore, G-35® alloy is much less susceptible to chloride-induced stress corrosion cracking than the stainless steels and nickel-chromium-iron alloys traditionally used in “fertilizer-grade” phosphoric acid.
HYBRID-BC1® alloy (UNS N10362) possesses much higher resistance to hydrochloric, hydrobromic, and sulfuric acids than the nickel-chromium-molybdenum (C-type) alloys, and can tolerate the presence of oxidizing species. The alloy also exhibits extremely high resistance to pitting and crevice corrosion.
HASTELLOY® N alloy (UNS N10003) has good resistance to aging and embrittlement and good fabricability. It has excellent resistance to hot fluoride salts in the temperature range of 1300°F to 1600°F (705°C-870°C).
ULTIMET® alloy
ULTIMET® alloy (UNS R31233) provides many of the corrosion characteristics of the nickel-based HASTELLOY G-type alloys and many of the wear characteristics of the cobalt-based STELLITE® alloys, in a single, highly weldable material. It excels under conditions conducive to galling and cavitation erosion.

Titanium Alloy


HAYNES® Ti-3Al-2.5V 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.

Alloy Nominal Compositions

To view all of our Corrosion-resistant and High-temperature alloy nominal compositions, click here.