ASTM B366 WPNCMC UNS N06625 Elbow Tee Reducer Caps Pipe Fittings ASME B16.9
ASTM B366 WPNCMC Pipe Fittings | ASME B16.9
ASTM B366 WPNCMC UNS N06625 pipe fittings are butt-weld nickel alloy fittings manufactured from Inconel 625, offering outstanding resistance to corrosion, high temperature, and high pressure. These fittings are produced in accordance with ASTM B366 and dimensional standard ASME B16.9, ensuring excellent performance and long service life in severe operating environments.
Material Grade – UNS N06625 (Inconel 625)
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Nickel-Chromium-Molybdenum alloy
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Exceptional resistance to:
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Chloride pitting & crevice corrosion
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Oxidation at high temperatures
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Stress corrosion cracking
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High tensile strength without heat treatment
ASTM Designation: WPNCMC
UNS Number: N06625
Chemical Composition (wt %)
| Element | Content (%) |
|---|---|
| Nickel (Ni) | ≥ 58.0 |
| Chromium (Cr) | 20.0 – 23.0 |
| Molybdenum (Mo) | 8.0 – 10.0 |
| Niobium + Tantalum (Nb + Ta) | 3.15 – 4.15 |
| Iron (Fe) | ≤ 5.0 |
| Carbon (C) | ≤ 0.10 |
| Manganese (Mn) | ≤ 0.50 |
| Silicon (Si) | ≤ 0.50 |
| Phosphorus (P) | ≤ 0.015 |
| Sulfur (S) | ≤ 0.015 |
| Aluminum (Al) | ≤ 0.40 |
| Titanium (Ti) | ≤ 0.40 |
Balance: Nickel
Mechanical Properties (Room Temperature)
| Property | Requirement |
|---|---|
| Tensile Strength | ≥ 827 MPa (120 ksi) |
| Yield Strength (0.2% offset) | ≥ 414 MPa (60 ksi) |
| Elongation | ≥ 30% |
| Reduction of Area | ≥ 45% (typical) |
These values provide excellent strength, ductility, and fatigue resistance for high-stress applications.
Hardness
| Hardness Scale | Typical Value |
|---|---|
| Brinell (HB) | ≤ 220 HB |
| Rockwell | Approx. HRB 85 – 95
Hardness is controlled by solution annealing; UNS N06625 is not precipitation hardened. |
Heat Treatment
Standard Heat Treatment for ASTM B366 UNS N06625
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Solution Annealing
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Temperature: 1093 – 1205°C (2000 – 2200°F)
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Cooling: Rapid quench (water or air)
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Available Pipe Fittings
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Elbow (45°, 90°, 180° – Long Radius / Short Radius)
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Tee (Equal Tee, Reducing Tee)
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Reducer (Concentric Reducer, Eccentric Reducer)
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Cap (Buttweld End Cap)
All fittings comply with ASME B16.9 dimensional tolerances.
Size Range & Specifications
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Nominal Pipe Size (NPS): 1/2″ – 48″
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Wall Thickness:
SCH 10 / SCH 20 / SCH 40 / SCH 80 / SCH 160 / XXS -
Manufacturing Process: Hot forged / Hot formed
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End Type: Butt Weld (BW)
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Heat Treatment: Solution annealed
Standards & Testing
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Material Standard: ASTM B366
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Dimension Standard: ASME B16.9
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Inspection & Tests:
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Chemical composition analysis
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Mechanical property testing
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PMI test
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NDT (UT / RT / PT) upon request
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Certification: EN 10204 3.1 / 3.2
Applications
ASTM B366 UNS N06625 fittings are widely used in:
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Oil & Gas pipelines
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Petrochemical & chemical processing
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Offshore & marine engineering
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Power plants
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Heat exchangers
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Desalination plants
Why Choose ASTM B366 WPNCMC Inconel 625 Fittings?
Compared with stainless steel fittings, UNS N06625 pipe fittings provide:
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Superior resistance to chloride stress corrosion cracking
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Better performance in acidic and seawater environments
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Higher mechanical strength under extreme conditions
