Hastelloy X Round Bar (UNS N06002) - Precision-Machined for Extreme Environment Performance

Product Overview

Hastelloy X (UNS N06002) is a nickel-chromium-iron-molybdenum alloy specifically designed for exceptional performance in high-temperature and severely corrosive environments. As a solid-solution strengthened superalloy, it combines outstanding oxidation resistance with excellent structural strength and ease of fabrication. Our precision-machined Hastelloy X round bars are produced under strict quality controls to ensure reliability in the most demanding applications, including aerospace, petrochemical processing, and industrial gas turbine components.

Chemical Composition

The chemical composition of Hastelloy X is meticulously balanced to deliver its signature high-temperature properties and corrosion resistance. The table below details the elemental composition range per standard specifications.

Table 1: Chemical Composition of Hastelloy X (UNS N06002) (Weight %) 

• Nickel (Base): Provides the fundamental austenitic matrix, offering inherent ductility, toughness, and resistance to various corrosive media .

• Chromium: The primary element responsible for the alloy's exceptional oxidation resistance at high temperatures by forming a protective chromium oxide scale .

• Molybdenum and Tungsten: Contribute to solid-solution strengthening, enhancing high-temperature strength and creep resistance .

• Controlled Carbon Content: Optimizes the balance between strength and corrosion resistance .

Mechanical Properties

Hastelloy X round bars exhibit a robust combination of strength and ductility across a wide temperature range. The following table outlines the typical minimum mechanical properties at room temperature for solution-annealed material.

*Table 2: Typical Mechanical Properties of Hastelloy X Round Bar (Solution-Annealed Condition)* 

These properties ensure that Hastellelloy X round bars can withstand significant structural loads while providing good fatigue resistance and fracture toughness in demanding service conditions. The alloy retains a significant portion of its strength at elevated temperatures, making it suitable for prolonged service at temperatures up to 900°C, with short-term exposure capabilities up to 1200°C .

Key Characteristics & Advantages

Hastelloy X is distinguished by several key characteristics that make it a preferred material for extreme environment applications.

1. Exceptional High-Temperature Strength: The alloy retains a significant portion of its strength at elevated temperatures, exhibiting excellent creep and stress-rupture properties above 790°C (1450°F) . This makes it ideal for components under sustained mechanical loads at high temperatures.

2. Superior Oxidation Resistance: With a chromium content of over 20%, Hastelloy X possesses outstanding oxidation resistance up to 1200°C . It performs reliably in both oxidizing and reducing atmospheres, preventing rapid degradation.

3. Excellent Resistance to Corrosive Environments: The nickel-chromium-molybdenum base provides strong resistance to a variety of corrosive attacks, including sulfidation, carburization, and halogen-containing atmospheres . This is crucial in petrochemical processes where such environments are common.

4. Good Fabricability: Hastelloy X offers good formability and weldability . It can be welded using common techniques such as TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas) welding without the need for post-weld heat treatment, facilitating the fabrication of complex components 

5. Stable Microstructure: In the solution-annealed condition, the alloy's structure is an austenitic matrix with minimal secondary phases, ensuring long-term stability and performance at high temperatures 

Standards & Equivalent Grades

Hastelloy X round bars are produced to meet various international standards, ensuring material quality and consistency. The primary standard for round bars is ASTM B572 .

Table 3: Standard and Equivalent Grades for Hastelloy X (UNS N06002) 

Other relevant standards for Hastelloy X products include AMS 5754 for forgings and ASTM B622 for seamless pipes and tubes .

Other Available Product Forms

To support comprehensive manufacturing and repair projects, Hastelloy X is available in various forms, including :

• Sheets and Plates

• Pipes and Tubes (seamless and welded)

• Fittings and Flanges

• Forged Components (rings, discs, custom shapes)

• Welding Consumables (wire, electrodes)

• 3D Printing Spherical Powder 

Packaging and Transport

To ensure our products reach you in perfect condition, we employ rigorous packaging and handling protocols.

• Protective Coating: Round bars are typically coated with a rust-preventive oil to protect against moisture during transit and storage.

• Individual Wrapping: Each bar is individually wrapped in waterproof and anti-corrosive paper or plastic.

• Sturdy Securement: Bundled and securely strapped to wooden or metal pallets to prevent movement and damage during transportation.

• Clear Labeling: All packages are clearly labeled with material grade, heat number, size, and other relevant identification for easy traceability and handling.

• Documentation: Each shipment includes complete documentation, including Material Test Certificates (MTC/CMTR) that certify compliance with the ordered specification, along with heat numbers for traceability .

Summary

The Hastelloy X (UNS N06002) round bar is a premium, high-performance nickel-based alloy engineered to solve the most challenging high-temperature and corrosion problems in industries such as petrochemical, aerospace, and power generation. Its balanced composition delivers an unmatched mix of extreme oxidation resistance, high structural strength, and excellent fabricability. Manufactured to strict standards like ASTM B572, it provides a reliable material solution for custom-sized, precision-machined components operating under severe conditions, ensuring long service life and operational safety. Our commitment to quality control from melting to final machining guarantees a product that meets the stringent demands of extreme environment performance.