Inconel 625 (UNS N06625) Supplier | Bar, Tube, Plate - Hangbo Alloy

Shanghai Hangbo Alloy Group Co., Ltd. is a leading ISO-certified source supplier and global supplier of Inconel 625 (UNS N06625). We provide high-performance nickel-chromium-molybdenum alloy solutions including round bars, seamless tubes, and plates, optimized for the most demanding environments in aerospace, marine engineering, and oil & gas.

ASTM Standards & Specifications

Our Inconel 625 products strictly adhere to international quality standards, ensuring reliability in critical applications:

• ASTM B446: Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy Rod and Bar.
• ASTM B443: Standard Specification for Nickel-Chromium-Molybdenum-Columbium Alloy Plate, Sheet, and Strip.
• Other Specifications: AMS 5666, AMS 5599, ASME SB-446/443.

Chemical Composition (ASTM B446/B443)

Mechanical Properties (Annealed)

Material Characteristics & Applications

Inconel 625 is renowned for its exceptional strength and toughness from cryogenic temperatures up to 1800°F (982°C). Its primary advantage lies in the solid-solution strengthening effect of molybdenum and niobium on the nickel-chromium matrix.

• Superior Corrosion Resistance: Excellent resistance to pitting, crevice corrosion, and intergranular attack.
• High Fatigue Strength: Ideal for components subject to cyclic loading.
• Applications: Aerospace engine exhaust systems, fuel and hydraulic line tubing, marine components (bellows, submarine seals), and chemical processing equipment.

Global Project Case: Shell Subsea Pipeline

Scenario: A major subsea flowline project operated by Shell required a material that could withstand the extremely corrosive environment of deep-sea oil extraction while maintaining structural integrity for over 20 years.

Solution: Hangbo Alloy supplied high-grade Inconel 625 cladding for the flowlines and manifold components. The alloy's resistance to chloride-induced stress corrosion cracking was the decisive factor.

Service Performance: During inspection after 15 years of service, the Inconel 625 components showed zero visible corrosion and negligible weight loss, even in high salt spray and high-pressure deep-sea conditions.

Pros, Cons & FAQ

Pros

• Outstanding resistance to a wide range of corrosive media.
• Excellent weldability without the need for post-weld heat treatment.
• High mechanical strength at both low and high temperatures.

Cons

• Higher cost compared to standard stainless steels.
• Work hardening occurs rapidly during machining.

FAQ

Q: Can Inconel 625 be used in contact with seawater?
A: Yes, Inconel 625 is exceptionally resistant to seawater, both in flowing and stagnant conditions. It is virtually immune to pitting and crevice corrosion, making it a standard choice for marine exhaust systems, submarine components, and subsea cable sheathing.

Q: What is the benefit of adding Niobium (Nb) to Inconel 625?
A: Niobium, together with Molybdenum, acts as a solid-solution strengthener in the nickel-chromium matrix. This provides the alloy with high strength and toughness without the need for precipitation hardening heat treatments.

Q: Is Inconel 625 weldable?
A: Yes, Inconel 625 has excellent weldability. It can be joined by most conventional welding methods, including GTAW (TIG), GMAW (MIG), and SMAW. Its composition is designed to resist cracking in the heat-affected zone, maintaining corrosion resistance in the as-welded state.

Q: Is Inconel 625 magnetic?
A: No, Inconel 625 is a non-magnetic alloy.

Q: How does Inconel 625 compare to Incoloy 825?
A: While both offer excellent corrosion resistance, Inconel 625 provides significantly higher strength and better performance at elevated temperatures.

Production Process

Our material is manufactured using VIM (Vacuum Induction Melting) + VAR (Vacuum Arc Remelting) or ESR (Electroslag Refining) processes to ensure ultra-high purity and metallurgical integrity. The material undergoes precision machining and rigorous heat treatment (Solution Annealing/Aging) to achieve the specified mechanical properties and grain size consistency.

Testing & Inspection

To guarantee zero-defect delivery, all batches undergo comprehensive testing:

• UT/PT Flaw Detection: Ultrasonic and Penetrant testing to identify surface and internal defects.
• Mechanical Testing: High and low temperature tensile testing, impact testing, and hardness verification.
• Corrosion Testing: Intergranular corrosion tests and pitting resistance verification according to ASTM standards.

Quality Control

We implement a total quality management system with full-process traceability from raw material to finished product. All products are manufactured in strict compliance with ASTM, ASME, and AMS standards, accompanied by EN 10204 3.1/3.2 certificates.

Market Pain Points & Solutions

• Delivery Consistency: We address supply chain delays by maintaining a large inventory of raw billets and semi-finished products, ensuring rapid response times.
• Extreme Environment Tolerance: Our specialized melting processes ensure that our alloys maintain structural stability in highly corrosive and high-pressure environments where standard materials fail.

Deep Application Insights

• Petrochemical: Used in flare stacks and flare tips where resistance to high temperatures and sour gas corrosion is critical.
• Nuclear Power: Applied in reactor core components and control rod mechanisms due to its excellent radiation resistance and mechanical stability.
• Aerospace: Found in engine exhaust systems and turbine shroud rings where high fatigue strength and oxidation resistance are required.

Product Forms & Standards Comparison

Internal Links to Related Alloys

• Incoloy 825 - For general sulfuric and phosphoric acid service.
• Incoloy 800/800H - For high-temperature heat exchanger applications.
• Nimonic 80A - For aerospace fastening and high-temperature creep resistance.