API 6A CRA Alloy 718 Forging Rings Inconel 718 Customized Forgings for Critical Oil & Gas Applications

API 6A CRA Alloy 718 Forging Rings Inconel 718 Customized Forgings for Critical Oil & Gas Applications

Compliance with API 6A and CRA Designation

Material Properties of Inconel 718 (Alloy 718)

• Chemical Composition: Dominated by nickel (50-55%), chromium (17-21%), and iron (balance), with key alloying elements including niobium (4.75-5.5%), molybdenum (2.8-3.3%), titanium (0.65-1.15%), and aluminum (0.2-0.8%). These elements form strengthening intermetallic phases (γ’ and γ”) during heat treatment, enabling the alloy to retain strength at temperatures up to 650°C (1200°F).
• Mechanical Strength: Tensile strength exceeding 1300 MPa (188,500 psi) and yield strength over 1000 MPa (145,000 psi) when heat-treated, making it ideal for high-pressure API 6A components.
• Corrosion Resistance: Resistant to pitting, crevice corrosion, and stress corrosion cracking in aggressive media, including sour environments (NACE MR0175/ISO 15156 compliance for H₂S service).
• Fabricability: Despite its high strength, Inconel 718 can be hot-forged into complex shapes (like rings) with precise dimensional control, followed by solution annealing and aging to achieve optimal properties.

Customized Forging Rings: Design and Manufacturing

• Dimensions: Outer diameter (OD) ranging from small-scale (e.g., 100mm) to large, heavy-wall rings (OD up to 2000mm+), with wall thicknesses and inner diameters (ID) precision-machined to meet drawing requirements.
• Forging Process: Hot die forging or open-die forging, depending on size and complexity, to refine grain structure, eliminate porosity, and enhance mechanical properties. The forging process ensures directional strength, critical for withstanding cyclic loads in wellhead operations.
• Heat Treatment: Customized cycles (solution annealing at 980-1065°C, followed by aging at 700-730°C) to achieve the required hardness (typically 32-44 HRC) and toughness, balancing strength with ductility for API 6A’s impact resistance demands.
• Surface Finish: Options include as-forged, machined (Ra 1.6μm or better), or coated (e.g., anti-galling treatments) to prevent seizing in mating components like valves or flanges.

Quality Assurance and Testing

• Non-Destructive Testing (NDT): Mandatory ultrasonic testing (UT) per ASTM A388 or API 6A requirements to detect subsurface defects; magnetic particle inspection (MPI) for surface cracks; and liquid penetrant testing (LPT) for tight tolerance areas.
• Mechanical Testing: Tensile, impact (Charpy V-notch), and hardness tests on each heat lot to verify strength and toughness.
• Chemical Analysis: Spectroscopic analysis to confirm compliance with Inconel 718 composition standards (ASTM B637, AMS 5663).
• Traceability: Full documentation, including heat numbers, test reports, and material certificates (EN 10204 Type 3.1 or 3.2), to meet API 6A’s audit requirements.

Applications in Oil & Gas

• Valve bodies and bonnets
• Flanges and connectors
• Choke and kill manifold components
• Wellhead adapters and spools

Chemical Composition of Alloy 718 (%)

Hunan Dinghan New Material Technology Co.,Ltd. (DINGSCO) specialized in Nickel Based Corrosion Resistant and High Temperature alloys products which used in the world’s most technically demanding industries and applications.

We have complete advanced technology facilities to produce best quality alloys to meet exacting your specifications such as VIM (Vacuum lnduction Melting) furnace to provide high purity Alloys,ESR (Electro Slag Re-melting) furnace to enhances the structure and purity of the Alloys, and CNC machining equipments (Lathe, Wire cutting, Drilling,Milling) to provide high precision finished products.

We are dedicated to providing our customers with best quality products,fastest possible deliveries, most competitive prices of Nickel Based Corrosion Resistant and High Temperature alloys in bars,rods,forged flanges, valve parts, forged shapes (shafts, discs, blocks, hubs,rings, cylinders and tailor shapes) according to ASTM,ASME,API,AMS, NACE and other industry standards.

We can help you gain a competitive edge in the market by responding to a rush quote in less than 24 hours and even complex requests for price and delivery quotations are responded to within 48 hours.