ASTM Standard Hastelloy X Round Bar Custom Sizes Available for Petrochemical Use

Hastelloy X is a nickel-chromium-iron-molybdenum alloy specifically engineered for high-temperature service in severely corrosive environments. This solid-solution strengthened superalloy delivers exceptional oxidation resistance at temperatures up to 1200°C (2200°F) while maintaining excellent strength at elevated temperatures. Round bars manufactured from Hastelloy X are particularly valued in the petrochemical industry for their reliability in critical applications including furnace components, reformer tubes, and reactor parts where both high temperature strength and corrosion resistance are essential.

The carefully balanced chemical composition of Hastelloy X provides its signature high-temperature performance characteristics.

• Nickel (Base): Provides the fundamental matrix, offering inherent ductility, toughness, and resistance to various corrosive media
• Chromium: Primary element responsible for 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
• Iron: Optimizes cost and certain performance characteristics

Hastelloy X round bars exhibit a robust combination of strength and ductility at both room and elevated temperatures.

• Exceptional High-Temperature Strength: Retains significant strength at elevated temperatures with excellent creep and stress-rupture properties above 790°C (1450°F), ideal for components under sustained mechanical loads
• Superior Oxidation Resistance: Chromium content over 20% provides outstanding oxidation resistance up to 1200°C, performing reliably in both oxidizing and reducing atmospheres
• Excellent Corrosion Resistance: Nickel-chromium-molybdenum base provides strong resistance to sulfidation, carburization, and halogen-containing atmospheres common in petrochemical processes
• Good Fabricability: Offers excellent formability and weldability using common techniques like TIG and MIG welding without requiring post-weld heat treatment
• Stable Microstructure: Austenitic matrix with minimal secondary phases in solution-annealed condition ensures long-term stability and performance at high temperatures

Hastelloy X round bars are produced to meet various international standards, ensuring material quality and consistency.

• Petrochemical Industry:
  • Furnace components (radiant tubes, convection tubes, pigtails)
  • Reformer and cracking tubes
  • High-temperature reactor parts
  • Components in sulfur and corrosive environments
• Aerospace and Gas Turbines:
  • Combustion chambers and liners
  • Afterburner components
  • Tailpipes and turbine shrouds
• Industrial Heating Technology:
  • Heat treatment fixtures (grid plates, furnace rolls)
  • Heat exchangers and burner nozzles
• Power Generation:
  • Components in gas turbines and nuclear reactors

Hastelloy X round bar is a premium, high-performance nickel-based alloy engineered to solve the most challenging high-temperature and corrosion problems in the petrochemical and other heavy industries. 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 components operating under severe conditions, ensuring long service life and operational safety.