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

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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