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Alloy X Nickel Sheet, Coil, Bar & Plate - AMS 5536, 5754 UNS N06002


Hastelloy® X is a high temperature and corrosion resistant nickel-based solid solution strengthened alloy. This alloy has outstanding resistance to oxidation at high temperatures and possesses exceptional strength at elevated temperatures. This alloy exhibits good formability, weldability, and machinability.

Alloy X is non-magnetic. It has high strength up to 1500ºF (816ºC) and good oxidation resistance up to 2200ºF (1204ºC). This alloy is especially resistant to carburization and nitriding, conditions which cause failure in some high temperature alloys. It is used extensively in high temperature jet engine and chemical processing applications and is highly resistant to stress corrosion cracking in petrochemical applications.

Product

Standard Inventory Specifications

Alloy X sheet, coil, plate and bar stock

  • UNS N06002

Alloy X sheet and plate

  • AMS 5536
  • ASTM B 435
Alloy X bar
  • AMS 5754
  • ASTM B 572

Other industry standards we comply with

  • ASME SB 435
  • EN 2.4665
  • B50A249C
  • B50A436
  • B50A463
  • PWA-LCS
  • GE-S400/1000
  • RR SABRe Edition 2
  • DFARS Compliant

Common Trade Name

  • Inconel HX (® Special Metals ), Hastelloy X (® Haynes International), ATI HX (™ Allegheny Technologies), Alloy-X

Industry Applications of High Temp Alloy-X

Jet engine components, afterburners, tailpipes, gas turbine operations, petro-chemical, structural components, industrial furnace, flash drier components

Inventory Size Range

  • Sheet : 0.020" - 0.130"
  • Bar : 0.250" - 6.500"
  • Plate : 0.1875" - 2.500"

The technical data provided is for information only and not for design purposes. It is not warranted or guaranteed.

Alloy X Chemical Composition

Chemical Composition

Element Percent by Weight
Carbon 0.05 - 0.15
Manganese 1.00 maximum
Phosphorus 0.040 maximum
Sulfur 0.030 maximum
Silicon 1.00 maximum
Chromium 20.50 - 23.00
Nickel Balance
Molybdenum 8.00 - 10.00
Titanium 0.15 maximum
Aluminum 0.50 maximum
Cobalt 0.50 - 2.50
Boron 0.01 maximum
Copper 0.50 maximum
Tungsten 0.20 - 1.00
Iron 17.00 - 20.00

Resistance to Corrosion and Oxidation

Alloy X has good resistance to oxidizing, reducing and neutral atmospheres encountered in furnace and jet engine operations up to 2200°F (1204°C). The alloy develops a protective, tenacious oxide film which does not spall off and, therefore, retains oxidation resistance at high temperatures.

Alloy X Physical Properties

  • Density: 0.297 lb/in3 (8.22 g/cm3
  • Specific Gravity: 8.22
  • Melting Range: 2300 - 2470°F (1260 - 1355°C)
  • Magnetic Permeability: < 1.002

Thermal Conductivity

Temperature Range Coefficients
°C °F W/m·K Btu/(hr/ft²/in/°F)
21 70 9.1 5.23
93 200 11.0 6.33
260 500 14.1 8.17
593 1100 20.8 12.0
704 1300 22.9 13.2
816 1500 25.0 14.5
927 1700 27.2 15.7

Electrical Resistivity

Temperature microhm-cm
°C °F
21 70 115.8
200 392 120
400 752 123
500 1112 127
800 1472 128
1000 1832 129

Alloy X Mechanical Properties

Mechanical Properties

Temperature 0.2% Yield Strength Ultimate Tensile Strength Elongation Percent
°F °C psi MPa psi MPa
-321 -196 - - 150,200 1035 46
-108 -78 - - 118,800 819 51
72 22 47,000 324 104,500 720 46
400 204 48,700 336 103,400 713 41
600 316 42,600 294 100,200 691 40
800 427 43,700 301 99,700 687 44
1000 538 41,500 286 94,000 648 45
1200 649 39,500 272 83,000 472 37
1400 760 37,800 261 63,100 435 37
1600 871 25,700 177 36,500 252 51
1800 982 16,000 110 22,500 155 45
2000 1093 8,000 55 13,000 90 40
2200 1204 3,700 26 5,400 37 31

 

Additional Information

Demand in the aerospace industry for new and useful metal alloys created a flurry of new superalloys in the 1950’s. One of these was Hastelloy X, a nickel base, solid solution superalloy with excellent resilience and strength at extreme temperatures up to 2200 degrees F. Easy to weld and form, and capable of resisting corrosion in many different conditions, Alloy X is a versatile material that we offer in bar stock, sheet, plate up to 1” thick, and full coils. Get a quote here to purchase one of these formulations.

Applications

One of the earliest applications that utilized the properties of Hastelloy X was in the JT-3 engines that powered the commercial Boeing 727 aircraft, where it replaced a failed combustor can. It remains a popular alloy in sheet form for use as combustion liner in the hot section (combustor or combustion chamber) of gas turbines.

Hastelloy X is a commonly used material in furnace rolls, such as the support rolls found in the annealing lines of the stainless steel industry, where high temperatures and harsh conditions would cause other metals to fail or crack. Even after many thousands of hours of use and heating and cooling cycles, furnace rolls made of Alloy X can maintain a blemish and crack free surface.

It is also popular in petrochemical and chemical processing industries, where its exceptional resistance to stress-corrosion cracking and resistance to oxidizing and reducing atmospheres make it the perfect alloy of choice. Muffle or retort furnaces are used in a variety of processing applications with controlled atmospheres, where formed sheets of Hastelloy X are used due to their ability to withstand a variety of conditions and temperatures, from heat treatment to pack diffusion coating.

Other common applications of this high temp nickel alloy include afterburners, tailpipes and exhaust equipment, structural components, industrial furnace and flash drier components.

Welding

Hastelloy X can be welded by most methods, including electric resistance welding (ERW), shielded-metal arc (SMAW), electron beam (EBW), gas metal arc (GMAW), gas tungsten-arc (GTAW), submerged arc welding (SAW) and more.

The material should be cleaned down to bright metal for the initial weld joint prep, using a proper solvent like acetone, and edge preparation done through machining or grinding with methods suitable for nickel base alloys. In particular, sheared Hastelloy sheet or plate should be ground down to remove stressed edge material.

Machining and Workability

The AISI machinability rating of Hastelloy X is 27% of B1112. Alloy X is machinable in wrought and cast form, needs rigid tools, and should be cut at low speeds with a good supply of coolant. Sulfur based cutting fluids are recommended.

Typical stock removal rate: 45 surface ft. per minute with high speed tools or 125 surface ft. per minute with carbide


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