Hastelloy® X / N06002

ASTM B435, B366, B572, B619 B622, B626, B751, B775, B829
UNS Number N06002
DIN 2.4665

Other common names: Alloy X, Inconel® HX Hastelloy X is a nickel-based super alloy that possesses excellent resistance to corrosion. Additionally, it delivers strong strength characteristics at elevated temperatures-up to 2200 degrees Fahrenheit. Hastelloy X is well suited for forming and welding.

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.

In what forms is Hastelloy X Available at SAGAR STEELS?

• Sheet
• Plate
• Bar

    

ASTM Specifications

     

What are the characteristics of Hastelloy X?

• Outstanding oxidation resistance through 2000° F
• Resistant to carburization and nitriding
• Excellent high temperature strength
• Good resistance to chloride stress-corrosion cracking

Chemical Composition, %

In what applications is Hastelloy X used?

1. Gas turbines
2. Petrochemical industry
3. Industrial furnaces
4. Heat treating equipment
5. Nuclear engineering
6. Jet engine combustion chambers
7. Aircraft cabin heaters
8. Turbine exhaust components
9. Gas turbine operations
10. Petrochemical
11. Structural components
12. Industrial furnace

     

Alloy X is one of the most widely used nickel base superalloys for gas turbine engine combustion zone components such as transition ducts, combustor cans, spray bars and flame holders as well as in afterburners, tailpipes and cabin heaters. It is recommended for use in industrial furnace applications because it has unusual resistance to oxidizing, reducing and neutral atmospheres. Hastelloy X is also used in the chemical process industry for retorts, muffles, catalysts support grids, furnace baffles, tubing for pyrolysis operations and flash drier components.

Fabrication with Hastelloy X

Alloy X has excellent forming and welding characteristics. It can be forged and, because of its good ductility, can be cold worked. It can be welded by both manual and automatic methods including shielded metal arc, gas tungsten arc, gas metal arc and submerged arc processes. The alloy can also be resistance welded. For hot forming, the alloy should be heated to a starting temperature of 2150° F (1175°C).

ASTM Specifications

Mechanical Properties of Hastelloy X

Typical short time cryogenic and elevated temperature tensile properties for Hastelloy X sheet and plate materials solution treated at 2150 to 2175°F (1177 to 1190°C) and rapidly cooled are shown below.

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

     

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