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Inconel 625 Round Bar ASTM B446 for Marine Engineering with Corrosion Resistance

  • Inconel 625 Round Bar ASTM B446 for Marine Engineering with Corrosion Resistance
  • Inconel 625 Round Bar ASTM B446 for Marine Engineering with Corrosion Resistance
  • Inconel 625 Round Bar ASTM B446 for Marine Engineering with Corrosion Resistance
  • Inconel 625 Round Bar ASTM B446 for Marine Engineering with Corrosion Resistance
  • Inconel 625 Round Bar ASTM B446 for Marine Engineering with Corrosion Resistance
  • Inconel 625 Round Bar ASTM B446 for Marine Engineering with Corrosion Resistance
Certification ISO, ASTM, EN, DIN
Minimum Order Quantity 30 kg
Product Details
Model NO. 625 Shape Round
Technique Hot Rolled Surface Treatment Pickling
Length Within 6m As Request Specification 6 - 350mm
Standard ASTM B446 / ASME SB446; UNS N06625 (Werkstoff Nr. 2.4856) Dimensions Diameters ¾"-8", Lengths Up To 20'
Finish Bright Polished, Black Oxide, Or Mill Finish Density 8.44 G/cm³
Tensile Strength 930 MPa (135,000 Psi) Minimum Yield Strength 517 MPa (75,000 Psi) Minimum
Elongation 42.5% Minimum (annealed Condition) Temperature Resistance Up To 982°C (1,800°F)
Chemical Composition Nickel (Ni) 58.0 Min, Chromium (Cr) 20.0-23.0, Molybdenum (Mo) 8.0-10.0, Niobium + Tantalum (Nb+Ta) 3.15-4.15, Iron (Fe) 5.0 Max, Carbon (C) 0.10 Max, Sulfur (S) 0.015 Max
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Marine Engineering Inconel 625 Round Bar

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ASTM B446 Alloy 625 Round Bar

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Corrosion Resistant Nickel Alloy Round Bar
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Product Description
Inconel 625 Round Bar (ASTM B446)
¾-8" Diameter, Marine Engineering; Matches Alloy 625
Product Overview
Engineered to meet the uncompromising demands of marine and offshore environments, our Inconel 625 Round Bar adheres strictly to ASTM B446 standards and offers full compatibility with Alloy 625. Available in diameters ranging from ¾" to 8" - the most requested sizes for marine engineering - this nickel-chromium-molybdenum alloy delivers exceptional corrosion resistance, high-temperature stability, and structural strength without requiring post-fabrication heat treatment.
Key Specifications
  • Standard: ASTM B446 / ASME SB446; UNS N06625
  • Dimensions: Diameters ¾"-8", lengths up to 20' (custom lengths available)
  • Finish: Bright polished, black oxide, or mill finish
  • Compliance: NACE MR 0175/ISO 15156, RoHS, and REACH compliant
Chemical Composition (ASTM B446)
Element Content Range (%) Role
Nickel (Ni) 58.0 min Core structural stability
Chromium (Cr) 20.0-23.0 Oxidation and corrosion resistance
Molybdenum (Mo) 8.0-10.0 Pitting/crevice corrosion defense
Niobium + Tantalum (Nb+Ta) 3.15-4.15 Solid-solution strengthening
Iron (Fe) 5.0 max Ductility enhancement
Carbon (C) 0.10 max Avoids carbide precipitation
Sulfur (S) 0.015 max Minimizes embrittlement
Mechanical Properties
  • Density: 8.44 g/cm³ (0.305 lbs/in³)
  • Tensile Strength: 930 MPa (135,000 psi) minimum
  • Yield Strength (0.2% offset): 517 MPa (75,000 psi) minimum
  • Elongation: 42.5% minimum (annealed condition)
  • Temperature Resistance: Maintains strength up to 982°C (1,800°F)
Marine Engineering Applications
Why It's Ideal for Marine Environments
Marine environments subject materials to chloride corrosion, thermal cycling, and high pressure - challenges this round bar effectively solves with its superior corrosion resistance and mechanical properties.
Key Advantages
  • Unmatched corrosion resistance in seawater, splash zones, and tidal areas
  • Excellent weldability without post-weld heat treatment
  • Resists pitting, crevice corrosion, and stress corrosion cracking
  • Extends equipment life by 3-5x compared to standard steels
Common Marine Applications
  • Subsea: Flexible risers, manifold piping, Christmas tree components
  • Topside: Flare stacks, seawater lift pipes, high-pressure separators
  • Shipbuilding: Valve trim, heat exchangers, propeller shafts
Quality Assurance
Each round bar undergoes comprehensive testing including chemical analysis via X-ray fluorescence (XRF), mechanical testing (tensile, hardness), ultrasonic inspection (UT) for internal defects, and surface quality checks per ASTM B446. Certificates of Compliance (CoC) and mill test reports (MTRs) are provided with every order.
Ordering Information
  • Stock diameters: ¾", 1", 1.5", 2", 3", 4", 6", 8"
  • Custom cuts (1'-20' lengths)
  • Value-added services: Threading, grooving, heat treatment
  • Fast lead times (2-5 days for stock; 2-3 weeks for custom)
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