Hastelloy X: Complete Properties & Application Guide

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Overview

Hastelloy X (UNS N06002 / W.Nr. 2.4665) is a nickel-chromium-iron-molybdenum superalloy with exceptional oxidation resistance and high-temperature strength up to 1200°C. It combines good forming and welding characteristics with outstanding resistance to stress corrosion cracking in petrochemical applications.

Chemical Composition

The chemical composition of Hastelloy X is carefully controlled to achieve its unique combination of properties and performance characteristics.

Element	Min %	Max %
Nickel (Ni)	47.0	Balance
Chromium (Cr)	20.5	23.0
Iron (Fe)	17.0	20.0
Molybdenum (Mo)	8.0	10.0
Cobalt (Co)	0.50	2.50
Tungsten (W)	0.20	1.00
Carbon (C)	0.05	0.15
Silicon (Si)	—	1.0

Mechanical Properties at Room Temperature

The mechanical properties of Hastelloy X vary depending on product form and heat treatment condition. The data below represents typical values for solution-annealed material.

Property	Value
Tensile Strength	690 MPa
Yield Strength (0.2% offset)	275 MPa
Elongation in 2 inches	40%
Density	8.22 g/cm3
Melting Point	1355 °C
Max Service Temperature	1200 °C

Corrosion Resistance

Excellent oxidation resistance up to 1200°C. Good resistance to carburization and nitridation. Resistant to stress corrosion cracking in petrochemical environments. The alloy forms a protective chromium oxide scale that provides long-term protection.

Applications

The unique combination of properties makes Hastelloy X suitable for a wide range of demanding applications:

• Gas Turbines: Combustion chambers, transition pieces, and afterburner components.
• Industrial Furnaces: Furnace rolls, retorts, and high-temperature structural components.
• Petrochemical: Catalyst regeneration systems and process heaters.
• Heat Treatment: Muffles, baskets, and fixtures for high-temperature service.
• Aerospace: Jet engine tailpipes and thrust reverser components.

Available Product Forms

Hangbo Alloy Group manufactures and supplies Hastelloy X in the following product forms, conforming to ASTM, AMS, and ASME specifications:

• Round Bars: Diameters from 6 mm to 300 mm, hot-finished or cold-drawn, solution annealed.
• Seamless Tubes & Pipes: Sizes from 6 mm OD to 219 mm OD, various wall thicknesses.
• Plates & Sheets: Thicknesses from 0.5 mm to 50 mm, hot-rolled or cold-rolled.
• Forgings: Custom flanges, rings, discs, and complex shapes per customer drawing.
• Welding Wire: Diameters 0.8 mm to 5.0 mm, precision-wound coils and spools.

Related Standards

Standard	Description
ASTM B435	Plate, Sheet, and Strip
ASTM B619	Welded Pipe
ASTM B622	Seamless Pipe
ASTM B572	Bar and Rod
ASTM B366	Fittings
AMS 5536	Sheet and Strip

Contact Us for Hastelloy X

Hangbo Alloy Group maintains extensive inventory of Hastelloy X in all standard product forms. We can provide mill test certificates, third-party inspection reports (SGS, TUV), and custom processing services.

For quotations, material certifications, or technical consultation, contact our sales team or call +86-136-1165-6360. We typically respond within 10 minutes.