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| Business Type | Manufacturer, Exporter, Supplier |
| Brand | FALCON |
| Material | UNS N10276, W.Nr. 2.4819, NiMo16Cr15W, Alloy C-276, Hastelloy® C-276, Inconel® C-276,Superimphy C276 |
| Finishing | FORGED |
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Product Details
Our Forged Hastelloy C276 Gate Valves are engineered for the most aggressive corrosive environments, where standard stainless steels fail. Hastelloy C276 is a nickel-molybdenum-chromium superalloy with an addition of tungsten, designed to have excellent corrosion resistance in a wide range of severe environments.
1. Design & Construction Features-
Design Standard: Manufactured in accordance with API 602 (for forged steel gate valves) and ASME B16.34.
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Rising Stem (OS&Y): Outside Screw and Yoke design ensures the stem threads are not in contact with the process fluid, preventing corrosion and easing lubrication.
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Bolted Bonnet: Features a high-integrity gasketed joint for ease of maintenance and reliable sealing under high pressure (Class 800 to 2500).
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Full Bore Design: Maximizes flow capacity and minimizes pressure drop across the valve.
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Body & Bonnet: Precisely forged for superior grain structure and increased strength over cast alternatives.
| Feature | Specification |
| Material | Hastelloy C276 (ASTM B564 UNS N10276) |
| Size Range | 1/2" to 2" (Larger sizes available in cast construction) |
| Pressure Class | Class 800, 1500, 2500 |
| End Connections | Socket Weld (SW), NPT Threaded, or Flanged (RF/RTJ) |
| Face-to-Face | ASME B16.10 |
| Wall Thickness | ASME B16.34 |
The manufacturing process for Hastelloy C276 requires specialized expertise due to the material's work-hardening characteristics:
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Precision Forging: Bodies are forged at controlled temperatures to prevent "hot shortness" and ensure a uniform metallurgical structure.
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Solution Annealing: Post-forging heat treatment is performed to restore maximum corrosion resistance and ductility.
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Advanced Machining: Utilizing high-torque CNC centers to achieve the tight tolerances required for API 602 compliance.
Every valve undergoes a rigorous verification process to ensure zero-leakage performance in critical service:
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Hydrostatic Testing: Conducted per API 598 (Shell and Seat test) to ensure structural integrity and bubble-tight shutoff.
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Pneumatic Testing: Low-pressure air testing to detect minute leaks in the seating surfaces.
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Material Verification: 100% Positive Material Identification (PMI) to guarantee the alloy composition meets UNS N10276 standards.
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Non-Destructive Testing (NDT): Including Liquid Penetrant Testing (LPI) on welds and critical forged surfaces.
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Certification: Full MTC (Material Test Certificate) to EN 10204 3.1 providing chemical and mechanical properties.
These valves are ideal for:
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Chemical Processing (Hydrochloric and Sulfuric acid service).
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Flue Gas Desulfurization (FGD) plants.
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Offshore Oil & Gas (Sour gas and high-chloride environments).
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Pharmaceutical and Waste Treatment.
These properties ensure the valve can withstand both high-pressure mechanical stress and extreme thermal fluctuations.
| Property | Value (Typical) |
| Tensile Strength | $\ge 100 \text{ ksi } (690 \text{ MPa})$ |
| Yield Strength (0.2% Offset) | $\ge 41 \text{ ksi } (283 \text{ MPa})$ |
| Elongation | $40\%$ |
| Density | $8.89 \text{ g/cm}^3$ |
| Melting Range | $1325°C – 1370°C$ |
| Hardness (Rockwell B) |
$\le 100 \text{ HRB}$ |
Hastelloy C276 is often referred to as the "Universal Corrosion-Resistant Material." Here is how it outperforms standard stainless steels and other nickel alloys:
1. Superiority Over Stainless Steel (316L/317L)-
Pitting Resistance: In chloride-rich environments (like seawater), 316L often suffers from localized pitting. C276 has a much higher PREN (Pitting Resistance Equivalent Number), typically $> 65$, compared to 316L's \approx 24.
2. Superiority Over Monel® 400
3. Resistance to Stress Corrosion Cracking (SCC)
4. Stability During Welding
