Discover the latest trends and innovations in the nickel alloy industry. We provide expert insights and in-depth analysis on the newest developments in nickel alloys.
Inconel 625 (UNS N06625 / W.Nr. 2.4856) is a nickel-chromium-molybdenum superalloy stabilized with niobium, renowned for its exceptional resistance to pitting, crevice corrosion, and chloride stress corrosion cracking, combined with reliable strength from cryogenic temperatures up to 980°C. For critical pressure boundary and structural applications, Shanghai COCESS Special Alloys Co., Ltd supplies premium Inconel 625 Forgings and Fittings, fully certified to ASTM B564 and relevant ASTM B443 standards, ensuring rigorous traceability for global engineering projects.
Precise Chemistry & Mechanical Baseline
The performance of Inconel 625 forgings and fittings is anchored in its strictly controlled solid-solution chemistry, providing high integrity in aggressive environments:
Chemical Composition (wt.%): Ni ≥ 58.0 (Balance), Cr 20.0 – 23.0, Mo 8.0 – 10.0, Nb+Ta 3.15 – 4.15, Fe ≤ 5.0, C ≤ 0.10, Mn ≤ 0.50, Si ≤ 0.50, Al ≤ 0.40, Ti ≤ 0.40.
Mechanical Properties (Annealed / Solution Treated, Room Temp):
Tensile Strength (Rm): ≥ 830 MPa (Typical 827–965 MPa / 120–140 ksi per ASTM B443/B446).
Yield Strength (Rp0.2): ≥ 414 MPa (Typical 414–552 MPa / 60–80 ksi).
Elongation (A): ≥ 30% (Typical 30–50%), ensuring robust toughness for forged components.
Physical Data: Density 8.44 g/cm³; Melting Range 1290 – 1350°C; Non-magnetic. The high Mo and Nb content yield a Pitting Resistance Equivalent Number (PREN) > 45.
ASTM B564 Certified Forgings Supply
For high-pressure, high-integrity connections and rotating components, our Inconel 625 forgings adhere strictly to ASTM B564 / ASME SB-564:
Product Forms: Open-die forged blocks, shafts, seamless rolled rings (for flanges/casings), and closed-die forged pre-forms (e.g., valve bodies, hub connectors).
Specifications: Manufactured to meet ASTM B564, ensuring proper grain flow, refined microstructure, and elimination of porosity compared to castings. Available in Solution Annealed (Grade 2 per B443 context, typically 980°C–1150°C rapid cool) or Annealed (Grade 1) conditions to maximize corrosion resistance and mechanical stability.
Dimensional Scope: Capable of producing forgings from smaller precision shapes up to large diameters (e.g., rings/discs up to 500mm–1000mm+ OD depending on configuration), with rough machining allowances available.
Forged Fittings & Compliance with B443 Context
While ASTM B443 primarily governs Plate, Sheet, and Strip, the material integrity and chemical/mechanical certification standards referenced in B443 are fundamental to the quality of our wrought fittings:
Fitting Types: We supply/purchase-certify heavy-duty forged fittings including Welding Neck Flanges, Blind Flanges, Socket Weld/Threaded Elbows, Tees, and Reducers, typically manufactured from B564 forgings or B446 bar stock (chemically aligned with B443 specs).
Pressure & Temp Rating: Designed for ASME B16.5/B16.47 dimensions, suitable for high-pressure marine, subsea, and chemical processing lines where resistance to chloride SCC (up to 980°C service) is mandatory.
Traceability: Even for fittings, the base material traceability (Heat Number, Chemical Analysis per B443/B564 limits) is maintained, ensuring the same corrosion immunity (PREN > 45) as the plate/bar stock.
Industrial Applications & Quality Assurance
Shanghai COCESS Special Alloys Co., Ltd provides these ASTM B564 / B443-aligned certified components for:
Marine & Offshore: Subsea manifold flanges, riser connectors, and platform firewater systems (immunity to seawater pitting/crevice corrosion).
Chemical Processing: High-pressure reactor nozzle forgings, heat exchanger channel covers, and acid transfer line fittings (handling hot H₂SO₄, H₃PO₄, mixed acids).
Oil & Gas (Sour Service): Wellhead forged hubs and flowline fittings resistant to Sulfide Stress Cracking (SSC) and H₂S/CO₂ environments (NACE MR-01-75 compliant material).
Every shipment includes an EN 10204 3.1 Material Test Certificate, verifying full chemical compliance (meeting ASTM B443/B564 limits) and mechanical properties. We support third-party inspection (SGS, TUV, BV) and offer technical consultation on machining (accounting for work hardening) and welding (using ERNiCrMo-3 filler).
For sourcing ASTM B564 certified Inconel 625 Forgings or high-integrity Fittings backed by B443-grade material data, contact the technical sales team at Shanghai COCESS Special Alloys Co., Ltd.
Website: https://en.cocessalloys.com
Email: sales@cocessalloys.com
