UNS Number N06002

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.

Available Forms of Hastelloy X at Rooplaxmi Steels:

• Bar
• Sheet
• Plate

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

Hastelloy X Chemical Composition, %:

Ni	Mo	Cr	Fe	W	Co	Mn	C
Balance	8.0-10.0	20.5-23.0	17.0-20.0	0.2-1.0	0.5-2.5	1.0 max	0.05-0.15

P	S	Si	Al	Ti	B	Cu
0.04 max	0.03 max	1.0 max	0.50 max	0.15 max	0.01 max	0.50 max

 

Application of Hastelloy X:

•  Gas turbines
•  Petrochemical industry
•  Industrial furnaces
•  Heat treating equipment
•  Nuclear engineering
•  Jet engine combustion chambers
•  Aircraft cabin heaters
•  Turbine exhaust components

Machining and Fabrication with Hastelloy X:

Hastelloy 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).

Hastelloy X ASTM Specification:

Sheet/Plate	Bar
B435	B572

 

Mechanical Properties of Hastelloy X:

Representative Tensile Properties, sheet

Temp° F	Tensile (psi)	0.2% Yield (psi)	Elongation in 2” (%)
70	1,10,600	54,900	44
1000	89,000	35,600	49
1200	83,000	35,400	54
1400	67,000	34,400	53
1600	45,000	28,200	58