API 6A CRA Inconel 718 Forging Bar Nickel Alloy Forging Bar

The API 6A CRA Inconel 718 Forging Bar is a high-performance alloy component engineered for critical applications in the oil and gas industry, specifically designed to meet the stringent requirements of API Specification 6A. As a corrosion-resistant alloy (CRA) product, it offers exceptional mechanical properties and corrosion resistance, making it ideal for use in harsh downhole and surface environments.

Material Specification

• Alloy Grade: Inconel 718 (UNS N07718)
• Material Type: Nickel-based superalloy with significant additions of chromium, iron, niobium, and molybdenum
• Form: Forged bar (round, square, or hexagonal cross-sections available)
• Manufacturing Process: Hot forging followed by solution annealing and aging treatments to optimize mechanical properties

Compliance Standards

• API 6A: Complies with the latest edition of API Specification 6A, which governs wellhead and Christmas tree equipment
• Material Certification: Meets ASTM B637 specifications for Inconel 718 forgings
• Quality Assurance: Traceable material certification, ultrasonic testing (UT), magnetic particle inspection (MPI), and chemical composition verification

Mechanical Properties

• Tensile Strength: Minimum 130 ksi (900 MPa)
• Yield Strength (0.2% offset): Minimum 100 ksi (690 MPa)
• Elongation: Minimum 12% in 2 inches (50 mm)
• Hardness: Typically 30-40 HRC after heat treatment
• Operating Temperature Range: -423°F to 1,300°F (-253°C to 704°C)

Corrosion Resistance

• Sour environments containing hydrogen sulfide (H₂S)
• Sweet corrosion from carbon dioxide (CO₂)
• Chloride-induced stress corrosion cracking
• General and pitting corrosion in high-salinity environments
• Oxidation at elevated temperatures

Applications

• Wellhead equipment components
• Valve bodies and trim
• Choke and kill manifolds
• Blowout preventers (BOPs)
• Other critical pressure-containing parts in upstream oil and gas operations
• Offshore and subsea equipment exposed to aggressive media

Dimensions and Customization

• Diameters: Available from 1" to 24" (25 mm to 600 mm)
• Lengths: Up to 20 feet (6 meters) or as per customer requirements
• Custom sizes and configurations available upon request
• Machining services offered to meet specific dimensional tolerances

Quality Control

• Chemical composition analysis (spectroscopic testing)
• Mechanical property testing (tensile, impact, hardness)
• Non-destructive testing (UT, MPI)
• Dimensional verification
• Microstructural examination

Chemical Composition(%):

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