Hastelloy® X - Pyromet® 680 - UNS N06002 - W. Nr. 2.4665 - Nickel Alloy X - NiCrMo AlloyHome > All Alloys > Hastelloy® X
|Table of Contents|
|General Data||Mechanical Properties|
|Specifications||Physical Properties & Application Data|
|Machining, Welding, & Processing||References|
Alloy X is an alloy with high strength and oxidation resistance to 2200 °F as well as good carburization and nitriding resistance. It has also been found to have good resistance to stress-corrosion cracking in some petrochemical applications. It has an ASME Boiler and Pressure Vessel code case.
Alloy X has excellent forming and welding characteristics, resistance to oxidizing, reducing, and neutral atmospheres. It exhibits good ductility after prolonged service temperatures of 1200 °F through 16,000 hours.
Alloy X is also suitable for internal structural components in industrial furnaces such as rolls, retorts, baffles, flash drier components, and muffles. It is a good choice for material for heat treating components such as trays and fixtures due to its excellent resistance to oxidizing atmospheres.
|Nominal Composition (Weight%)|
We can cold work high strength into your material to meet your high-performing requirements. We also facilitate in-house size conversions, rotary forging and drawing, and annealing materials, as well as our cold finish machining capabilities range of +/- 0.0002" Ø.
For more information, you can contact us at 1-800-945-8230, and request our GFM Bulletin; you can also view our brochure online! There's also more information about our offered services on our production capabilities page.
We have expanded our abilities to work smaller diameter bar down to nominal wire. Also, check out our weld wire to finish the job right!
Alloy X is recommended especially for use in furnace applications because it has unusual resistance to oxidizing, reducing, and neutral atmospheres. Furnace rolls made of this alloy were still in good condition after operating for 8700 hours at 2150 °F. Furnace trays, used to support heavy loads, have been exposed to temperatures up to 2300 °F. in an oxidizing atmosphere without bending or warping. Alloy X is also used for retorts, muffles, catalyst support grids, furnace baffles, tubing for pyrolysis operations and flash drier components.
Alloy X has wide use in gas turbine engines for combustion zone components such as transition duct, combustor cans, spray bars, and flame holders, as well as in afterburners, tailpipes, and cabin heaters.
Alloy X is one of the most widely used nickel base superalloys for gas turbine engine components. This solid solution strengthened grade has good strength and excellent oxidation resistance to 2000 °F. Alloy X has excellent resistance to reducing and carburizing atmospheres making it suitable for furnace components. Due to its high molybdenum content, Alloy X may be subject to catastrophic oxidation at 2200 °F.
- Good high temperature strength.
- Oxidation resistance through 2000 °F.
- Carburization resistant.
The typical properties listed can usually be provided in rounds, sheet, strip, plate, & custom forgings. We have the equipment to produce small quantities in special sizes to meet our customers’ specific needs. The table below shows Haynes' Nominal Room-Temperature Mechanical Properties of Alloy X Plate and Sheet. For most common forms and exceptions, check out the datasheet linked underneath the table.
|Form||Temp.||UTS ksi (MPa)||YS ksi (MPa)||Elong. in 2 in., %||Rockwell Hardness|
|Plate||70°F (21°C)||110.2 (760)||49.3 (340)||48.9||87B|
|Sheet||70°F (21°C)||113.5 (783)||54.5 (376)||46.5||86B|
UTS = Ultimate Tensile Strength, YS = Yield StrengthLink to Haynes' datasheet on Hastelloy® X
Note that the specifications listed are common for this alloy but are for reference only and may be specific to a certain form. The specifications listed are not comprehensive nor indicative of any edition, revision, or similar such as an amendment. Please, reach out to our sales department to request the Material Test Report (MTR) or to confirm your required specifications.
|Identification||UNS N06002, DIN 17744, DIN 17750-17754, W. Nr. 2.4665|
|Bar||AMS 5754, ASTM B572, ASME SB572|
|Sheet, Plate, or Strip||AMS 5536, ASTM B435, ASME SB435|
|Pipe - Seamless||ASTM B622, ASTM B829, ASME SB622, ASME SB829|
|Pipe - Welded||ASTM B619, ASTM B775, ASME SB619, ASME SB775|
|Tube - Seamless||AMS 5587, ASTM B622, ASTM B751, ASTM B829, ASME SB622, ASME SB751, ASME B829|
|Tube - Welded||AMS 5588, ASTM B626, ASTM B751, ASME SB626, ASME SB751|
|Fitting||ASTM B366, ASME SB366|
|Weld Wire||AMS 5798/ AWS A5.14 ERNiCrMo-2/ ASME IX F-No.43|
|Weld Electrode||AWS A5.11 ENiCrMo-2|
|Melting Range:||2300-2470 °F|
|Temperature, °F||Coefficient* of Thermal Expansion, in/in°F x 10-6||Thermal Conductivity, Btu by ft/ft2 by hr by °F||Modulus of Elasticity Dynamic, psi x 106|
* 70 °F to indicated temperature.
Nickel and cobalt based alloys can be difficult to machinine. However, it should be emphasized that these alloys can be machined using conventional production methods at satisfactory rates. These alloys harden rapidly, generate high heat during cutting, weld to the cutting tool surface and offer high resistance to metal removal because of their high shear strengths. The following are key points which should be considered during machining operations:
- CAPACITY - Machine should be rigid and overpowered as much as possible.
- RIGIDITY - Work piece and tool should be held rigid. Minimize tool overhang.
- TOOL SHARPNESS - Make sure tools are sharp at all times. Change to sharpened tools at regular intervals rather than out of necessity. A 0.015 inch wear land is considered a dull tool.
- TOOLS - Use positive rake angle tools for most machining operations. Negative rake angle tools can be considered for intermittent cuts and heavy stock removal. Carbide-tipped tools are suggested for most applications. High speed tools can be used, with lower production rates, and are often recommended for intermittent cuts.
- POSITIVE CUTS - Use heavy, constant, feeds to maintain positive cutting action. If feed slows and the tool dwells in the cut, work hardening occurs, tool life deteriorates and close tolerances are impossible.
- LUBRICATION - lubricants are desirable. Soluble oils are recommended especially when using carbide tooling.
ReferencesLink to Haynes' datasheet on Hastelloy® X
Hastelloy® is a registered trademark of Haynes International Inc.
Data referring to mechanical properties and chemical analyses are the result of tests performed on specimens obtained from specific locations of the products in accordance with prescribed sampling procedures; any warranty thereof is limited to the values obtained at such locations and by such procedures. There is no warranty with respect to values of the materials at other locations.