Incoloy 800H Alloy Round Bar for Petrochemical, Energy and High-Temperature Applications

ASTM B408 Incoloy 800H Round Bar

Incoloy 800H (UNS N08810) Nickel Alloy Round Bar is a high-temperature resistant nickel-iron-chromium alloy designed for applications requiring excellent creep strength, oxidation resistance, and thermal stability. With its controlled carbon content and stable austenitic structure, it maintains good mechanical strength during prolonged exposure to elevated temperatures. It also offers excellent resistance to carburization, oxidation, and corrosion in various industrial environments. Incoloy 800H round bars are widely used in petrochemical processing, industrial furnaces, heat exchangers, power generation, and high-temperature engineering equipment.

Key Features and Advantages

• Excellent Creep & Rupture Strength: Controlled carbon content plus solution annealing delivers stable long-term strength under sustained high-temperature load.

• Good High-Temperature Corrosion Resistance: Resists oxidation, carburization and mild sulfidation in furnace and hydrocarbon process atmospheres.

• Reliable Thermal Stability: Retains microstructure and mechanical integrity under repeated thermal cycling.

• Good Fabricability: Suitable for welding, forging, machining and forming by standard workshop procedures.

• Versatile High-Temperature Service: Approved for ASME pressure vessel construction for elevated temperature designs.

Typical Applications

• Petrochemical Equipment: Ethylene cracking furnace parts, steam methane reformer tubes, pigtails and manifolds.

• Thermal Processing Furnaces: Radiant tubes, furnace rolls, muffles, heat-treatment fixtures and baskets.

• Power & Energy: Superheater, reheater and waste heat recovery components.

• Chemical Process: High-temperature heat exchangers, reformer internals and high-temperature pressure vessel parts.

• Heating System: Sheaths for electric heating elements and high-temperature piping fittings.

Technical Specifications

• Product Name: Incoloy 800H Nickel Alloy Round Bar

• Material Designation: UNS N08810

• Material No.: W.Nr 1.4958

• Alloy Family: Nickel‑Iron‑Chromium Austenitic High Temperature Alloy

• Product Form: Round Bar / Rod

• Reference Standard: ASTM B408, ASME SB-408

• Diameter: Available according to manufacturing capability and customer requirements

• Length: Standard or custom lengths, subject to availability

• Surface Condition: As agreed in the purchase specification

• Inspection Documents: Material test certificates and inspection reports, as agreed

Quality Assurance 

Products can be supplied according to agreed specifications, with chemical composition verification, mechanical testing, dimensional inspection, surface examination, and material traceability where required. Material certificates and additional inspection documentation are available according to the purchase order and applicable product requirements.

Contact our sales team today for a competitive quote, technical datasheet, or to discuss your custom forging requirements.