Inconel 625 Nickel Alloy Forged Round Bar ASTM B446 AMS 5666 for Corrosion Resistant Marine Chemical Applications

Inconel 625 Nickel Alloy Forged Round Bar

Inconel 625 (UNS N06625 / W.Nr. 2.4856) is a nickel-chromium-molybdenum alloy with exceptional resistance to pitting, crevice corrosion, and stress-corrosion cracking. Our forged round bars are manufactured in strict compliance with ASTM B446 and AMS 5666 standards, making them the preferred choice for marine, chemical processing, and nuclear applications where reliability under aggressive conditions is critical.

Key Features

• Outstanding Corrosion Resistance: Excellent resistance to pitting and crevice corrosion in seawater, acidic environments, and chloride-containing media. Resists intergranular corrosion without post-weld heat treatment.
• High Strength & Toughness: Maintains mechanical integrity from cryogenic temperatures up to 980°C with tensile strength ≥827 MPa and yield strength ≥414 MPa in annealed condition.
• Exceptional Weldability: Readily weldable by conventional processes without susceptibility to post-weld cracking, eliminating the need for complex heat treatment after fabrication.
• Double Melting Process: Produced via VIM (Vacuum Induction Melting) followed by ESR (Electroslag Remelting) or VAR (Vacuum Arc Remelting) ensuring superior cleanliness and homogeneous microstructure.
• Customized Dimensions: Available in customized diameters and lengths to meet specific project requirements, with full traceability from melt to finished product.

Technical Specifications

Applications

• Marine Engineering: Propeller shafts, seawater piping, submarine components, and desalination equipment exposed to aggressive saltwater.
• Chemical Processing: Reactor vessels, heat exchangers, distillation columns, and piping systems handling corrosive acids and chlorides.
• Aerospace: Ducting systems, thrust reverser components, and turbine shroud rings where oxidation resistance at elevated temperatures is required.
• Nuclear Power: Reactor core components and control rod drive mechanisms requiring exceptional corrosion resistance under irradiation.
• Oil & Gas: Sour gas wellhead components, umbilical tubing, and subsea equipment exposed to H2S and chlorides.

Quality Assurance

Every batch undergoes rigorous testing including ultrasonic testing (UT), chemical composition analysis per ASTM E1473, mechanical property verification, and dimensional inspection. Full mill test certificates (MTC) per EN 10204 3.1 are provided with each shipment.

Packaging & Delivery

Products are securely packed in plywood cases or on wooden pallets with waterproof wrapping and export-grade protection. Standard delivery within 15-30 working days depending on order quantity and specification requirements.