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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, alongside reliable strength from cryogenic temperatures up to 980°C. As a direct manufacturer and supplier, Shanghai COCESS Special Alloys Co., Ltd eliminates intermediary costs to offer factory-direct pricing on premium-grade Inconel 625, ensuring full compliance with international standards and rigorous traceability for your critical industrial projects.
Precise Chemical Composition & Mechanical Data
The superior performance of Inconel 625 is anchored in its strictly controlled chemistry, balancing solid-solution strengthening with universal corrosion immunity:
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 (High-quality production often controls lower, e.g., ≤0.03~0.05 for enhanced purity), Mn ≤ 0.50, Si ≤ 0.50, Al ≤ 0.40, Ti ≤ 0.40, Co ≤ 1.0. The high Mo and Nb content drive a Pitting Resistance Equivalent Number (PREN) typically > 45.
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 high toughness.
Hardness: Typically ≤ 220 HB (Annealed soft state).
Physical Properties: Density 8.44 g/cm³; Melting Range 1290 – 1350°C; Non-magnetic; Thermal Conductivity (100°C) ~9.8 W/(m·K).
Factory Direct Supply Forms & ASTM Standards
By sourcing directly from Shanghai COCESS Special Alloys Co., Ltd, you benefit from competitive factory pricing on Inconel 625 products manufactured to stringent ASTM specifications:
Sheet, Plate & Strip: Supplied to ASTM B443 / ASME SB-443 (Grade 1 Annealed for ≤593°C service; Grade 2 Solution Annealed for >593°C/high-temp service). Covers cold-rolled (0.5mm–3.0mm+) and hot-rolled plates (3.0mm–50.0mm+), widths up to 2000mm.
Bar, Rod & Wire: Conforming to ASTM B446 / ASME SB-446 (AMS 5666). Includes Hot-Rolled/Forged rounds (Ø10mm–Ø300mm+), Cold Drawn precision bars (Ø2mm–Ø80mm), supplied in Solution Annealed condition for optimal corrosion resistance and machinability.
Seamless & Welded Tube/Pipe: Seamless to ASTM B444 / B829 (OD 6mm–273mm, Wall 0.5mm–20mm); Welded to ASTM B704 / B705 (OD 50mm–500mm+, Wall 1.0mm–30mm). Ideal for high-pressure heat exchangers and FGD systems, leveraging the alloy's high PREN and Cl-SCC immunity.
Forgings & Fittings: Produced under ASTM B564 / ASME SB-564, offering open-die blocks, rolled rings, and flanges/forged fittings with superior grain flow for high-integrity pressure boundary and marine/subsea applications.
Industrial Advantages & Application Scope
Choosing Inconel 625 from a factory-direct supplier like Shanghai COCESS Special Alloys Co., Ltd guarantees material integrity for demanding sectors:
Corrosion Dominant: Marine & Offshore (seawater piping, risers, subsea manifolds resisting Cl⁻ pitting/crevice corrosion); Chemical Processing (reactors, tanks for H₂SO₄, H₃PO₄, mixed acids, and halogenated organics).
Temperature & Environment: Aerospace (exhaust ducting, combustion liners stable from -196°C to 980°C); Nuclear/FGD (reprocessing equipment, scrubber absorbers, resistant to sour gas/NACE environments).
Key Advantage: The Nb stabilization fixes carbon, preventing weld heat-affected zone sensitization. This allows welding without post-weld heat treatment while retaining full corrosion resistance, significantly reducing fabrication costs—a major benefit passed on via our direct pricing model.
Quality Assurance & Direct Value
As a manufacturer, we ensure every shipment includes an EN 10204 3.1 Material Test Certificate with full heat number traceability, chemical analysis, and mechanical verification (meeting ASTM B443/B446 limits). We support third-party inspection (SGS, TUV, BV) and offer value-added services like waterjet cutting and rough machining.
For premium Inconel 625 with verified data compliance at factory-direct prices, contact the technical sales team at Shanghai COCESS Special Alloys Co., Ltd for a competitive quotation and efficient lead times.
Website: https://en.cocessalloys.com
Email: sales@cocessalloys.com
