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Views: 9 Author: Rachel Publish Time: 2024-08-02 Origin: Site
Hastelloy X is a nickel-chromium-iron-molybdenum superalloy with outstanding high temperature strength, oxidation resistance, and fabricability. Alloy X’s oxidation resistance is excellent up to 2200° F. This nickel steel alloy has also been found to be exceptionally resistant to stress-corrosion cracking in petrochemical applications. Matrix stiffening provided by the molybdenum content results in high strength in a solid-solution alloy having good fabrication characteristics. Although this nickel alloy is primarily noted for heat and oxidation resistance it also has good resistance to chloride stress-corrosion cracking, carburization, and excellent resistance to reducing or carburizing atmospheres. Two common conditions that often lead to early failure in high temperature alloys, carburization and nitriding, Hastelloy X resists..
AMS 5754 has no yield or tensile strength requirements, but it does require a hardness maximum and stress rupture minimums. Strong and Oxidation Resistant to 2200 Deg. F (1200 Deg. C) - Hastelloy X is a solid solution strengthened grade has good strength and oxidation resistance up to 2200 Deg. F (1200 Deg. C). The outstanding oxidation resistance of Hastelloy X is illustrated below. Tests were conducted by exposing samples to dry air at 2000 Deg. F. and to dry air pressurized to 300 psi at 1750 Deg. F. Two criteria for evaluating oxidation resistance are weight change and depth of corrosion penetration. HASTELLOY X excels in both respects due to the formation of a protective, tenacious oxide film.
Hastelloy X also resists carburization and nitriding, two common conditions which often lead to early failure in high-temperature alloys. After 100 hours in petroleum coke, four other materials were completely penetrated by carburization; whereas, Alloy X specimens showed no carburization at all. Of ten materials evaluated in an atmosphere of hydrogen, nitrogen and ammonia at 1100 Deg. F. and 25,00 psi for 64 days, Alloy X had a nitride case less than one-fourth as thick as the closest competitive material without intergranular attack.
JN Alloy is suppliers of Hastelloy X nickel in sheet, pipes, flanges, pipes fittings, round bar, and plate stock in a variety of lengths and widths, and we can custom cut this material to your exact specifications. Our nickel coil can also be slit to your desired width.
Grade | C≤ | Mn≤ | P≤ | S≤ | Si≤ | Cr | Mo | Fe | Co≤ | Ni | W |
Hastelloy X | 0.05-0.15 | 1.0 | 0.04 | 0.03 | 1.0 | 20.5-23.0 | 8.0-10.0 | 17.0-20.0 | 0.5-2.5 | Remainder | 0.2-1.0 |
Metal Type | Bar | Sheet&Plate | Tube&Pipe | Fitting | Forging | Weld Wire | Weld Electrode |
UNS N06002 | ASTM B572 | ASTM B435 | AMS 5587 AMS 5588 ASTM B619 ASTM B622 | ASTM B366 | AMS 5754 GE B50TF31 | A5.14 ERNiCrMo-2 | A5.11 ENiCrMo-2 |
Hastelloy X machining can be performed with conventional methods. Carbide tools are preferred, but high-speed steel cutting tools can also be used. Machinability is similar to that of austenitic stainless steels. The alloys is tough and, therefore, requires rigid fixturing, low cutting speeds and ample cutting fluids, either water-base or sulfochlorinated oil. Additionally, finish grinding is recommended when very close tolerances are required.
Similar to other nickel alloys we supply, such as Inconel 625 & Inconel 718, Hastelloy X has excellent welding ability, particularly in conjunction with gas-tungsten-arc (GTA), plasma-arc, and electron-beam welding. Generally, parent metal weld filler is used with welding carried out on solution heat treated material. Often post-weld heat treatment is employed to reduce residual weld shrinkage stresses. Strength and ductility are good in the as-welded condition, but a full post-weld solution heat treatment or lower temperature stress relief (1800F min) is often applied to obtain optimum properties (dimensional stability, fatigue life) in weldments.
Hastelloy X has very good forming ability when solution heat treated and can be cold formed by most of the common methods including drawing, rolling, bending, spinning, drop hammering, punching and shearing. The solution-treated condition is optimum for cold-forming operations because it provides minimum hardness and maximum ductility. Nevertheless, as a result of Hast X’s toughness and hardenability, relatively high energy levels and frequent intermediate solution treatments are required during severe cold forming operations. When performing simple bending operations on a brake press, Hastelloy X seldom requires lubrication. However, when performing severe forming, heavy-duty lubricants such as metallic soaps, chlorinated or sulfochlorinated oils are required. Additionally, land oil, caster oil or sperm oil lubricants are recommended for intermediate forming. Generally, after final cold working, parts should be solution treated to restore the optimum combination of mechanical properties and corrosion resistance.
Hastelloy X possesses excellent corrosion and oxidation resistance. It also has good sea water corrosion resistance and thus attractive for marine applications.
Hastelloy X wrought products are normally supplied by the mills in the solution heat treated condition, which provides the optimum combination of mechanical properties and corrosion resistance for practically all applications. Hastelloy X solution heat treatment consists of exposure to 2150 F followed by rapid cooling. The hold time at 2150 F varies with the section size of the product, size of load and furnace characteristics. A rule of thumb that provides acceptable results for the Hastelloy X product being treated is to hold for 1 hour per inch of thickness. The cooling rate from 2150 to 1000 F or below should be rapid enough to prevent carbide precipitation, which decreases corrosion resistance and toughness for Hastelloy X sheet products. Rapid air cooling is adequate for this process, however, oil or water quenching is frequently necessary for heavier sections. If surface oxidation can be tolerated, the Hastelloy X solution treatment can be carried out in air or in the normal mixture of air and combustion products in gas-fired furnaces. Alternatively, oxidation can be minimized by the use of an exothermic furnace atmosphere or it can be almost entirely prevented by dry hydrogen, dry argon or vacuum atmospheres.
Hastelloy x Forging should be carried out in the temperature range of 2150 to 1750 F with relatively moderate reductions per pass. Additionally, frequent reheating is required. Hast X hot upsetting is feasible when the length to be upset is no more than three times the diameter. Impact extrusion should be carried out near the upper end of the forging temperature range.
Hastelloy X has a wide range of applications in industries that require high-temperature resistance and corrosion resistance. Some of the most common applications of Hastelloy X include:
Gas turbine engines: Hastelloy X is used in gas turbine engines for its ability to withstand high temperatures and corrosive environments.
Industrial furnace components: Hastelloy X is used in the construction of industrial furnaces due to its high-temperature strength and resistance to oxidation and carburization.
Chemical processing equipment: Hastelloy X is used in chemical processing equipment for its resistance to a wide range of corrosive environments.
Aerospace components: Hastelloy X is used in aerospace components such as rocket engine parts and jet engine exhaust components for its high-temperature resistance and mechanical properties.
