Bright Polished Inconel 625 Nickel Alloy Round Bar / Round Steel Bar EN ASTM GB JIS Standard

Bright Polished Inconel 625 Nickel Alloy Round Bar / Round Steel Bar EN ASTM GB JIS Standard

More Specification Informations

Regular Diameter of Inconel 625 Round Bar in Stock 

Bright Polished Inconel 625 Nickel Alloy Round Bar / Round Steel Bar EN ASTM GB JIS Standard

Product Overview

Our Bright Polished Inconel 625 Round Bars represent the pinnacle of corrosion-resistant nickel alloy bar stock, engineered for exceptional performance in the most demanding environments. Inconel 625, a nickel-chromium-molybdenum-niobium superalloy, is renowned for its unique combination of high strength, excellent fabricability, and outstanding resistance to a wide range of corrosive media, oxidation, and high temperatures. The bright polished (cold drawn and polished) finish provides a superior surface quality that ensures close dimensional accuracy, enhanced aesthetic appeal, and reduced need for additional finishing, making it an ideal choice for precision machining and critical applications across aerospace, marine, chemical processing, and energy sectors. This product is manufactured and supplied in full compliance with major international standards, including ASTM, EN (European Norm), GB (Chinese Guobiao), and JIS (Japanese Industrial Standards), guaranteeing global quality and consistency.

Key Characteristics and Advantages

• Exceptional Corrosion Resistance: Offers superb resistance to pitting, crevice corrosion, and stress-corrosion cracking. It performs exceptionally well in acidic environments, seawater, and saline atmospheres, resisting attacks from chlorides and oxidizing chemicals.

• High Strength Across Temperatures: The strengthening mechanism provided by niobium (combined with molybdenum) gives the alloy high yield, tensile, and creep-rupture strength, properties that are retained from cryogenic temperatures up to approximately 1000°C (1800°F).

• Superior Oxidation Resistance: Forms a stable, adherent oxide layer that provides excellent protection against oxidation and carburization under high-temperature service conditions.

• Excellent Fabricability: Despite its high strength, Inconel 625 can be readily welded and fabricated using common techniques without post-weld heat treatment to maintain corrosion resistance.

• Bright Polished Finish: The cold drawing and polishing process results in a smooth, near-mirror surface finish. This reduces friction, minimizes surface contamination, improves corrosion resistance by eliminating surface imperfections, and provides an excellent substrate for further processing or for use in visually critical components.

Standard Specifications and Equivalent Grades

Detailed Chemical Composition (Weight %)

Typical Mechanical Properties (At Room Temperature)

• Tensile Strength: ≥ 830 MPa (120 ksi)

• Yield Strength (0.2% Offset): ≥ 415 MPa (60 ksi)

• Elongation: ≥ 30%

• Hardness: Typically ≤ 90 HRB

Available Specifications

• Form: Round Bars (Solid)

• Diameter Range: 6 mm (0.236 inches) to 300 mm (11.81 inches) - specific size availability may vary.

• Length: Standard random mill lengths or custom cut-to-length options.

• Condition: Solution Annealed / Bright Polished (Cold Drawn and Polished)

• Tolerance: Supplied with tight dimensional tolerances as per ASTM or customer-specific requirements.

Manufacturing Process & Quality Assurance

Our Bright Polished Inconel 625 bars are produced through a rigorously controlled process involving vacuum induction melting (VIM) and/or electric arc melting followed by secondary refining processes like ESR (Electro-Slag Remelting) to ensure extreme purity and homogeneity. The bars are then hot worked, solution annealed to optimize the microstructure, and finally cold drawn and polished to achieve the bright, smooth finish. Every batch is supported by a Mill Test Certificate (MTC) conforming to EN 10204 3.1 or equivalent, providing full traceability and verification of chemical composition and mechanical properties as per the ordered standard.

Applications

This high-performance alloy is specified for critical components where failure is not an option. Typical applications include:

• Aerospace: Engine thrust reversers, exhaust systems, ducting, rings, and casings.

• Marine & Offshore: Propeller blades, submarine components, seawater piping, heat exchangers on ships and offshore platforms.

• Chemical Processing: Reactors, vessels, columns, heat exchanger tubing, piping systems for aggressive chemical environments.

• Oil & Gas: Downhole logging tools, wellhead components, gas separation systems, choke and kill manifolds.

• Pollution Control: Scrubbers, stack liners, dampers, and fans in flue gas desulfurization (FGD) systems.

• Nuclear Power: Core components, control rod mechanisms, and reactor water cleanup system piping.

Why Choose Our Product?

We are a specialist supplier of high-performance nickel alloys, committed to providing not just material, but comprehensive technical support. Our extensive inventory, stringent quality control, and expertise in international standards ensure you receive a product that meets your precise engineering requirements, backed by reliable service and global logistics support.