Incoloy 800H Flanges Exporter in India
ASTM B564 UNS N08810 / W.Nr. 1.4876 Slip On, Weld Neck, Blind & Socket Weld Flanges for High-Temperature Industrial Applications
Comprehensive Technical Guide to Incoloy 800H Flanges Manufactured and Exported Worldwide by Arrow Piping India
Finding a trusted, verified Incoloy 800H Flanges Exporter In India is vital for process engineers, procurement leads, and EPC contractors managing extreme high-temperature applications. Incoloy 800H (UNS N08810 / W.Nr. 1.4876 / Alloy 800H) is a Nickel-Iron-Chromium solid-solution alloy specifically engineered to deliver high stress-rupture strength, creep resistance, and exceptional oxidation immunity at elevated operating temperatures exceeding 600°C (1100°F). At Arrow Piping, we take immense pride in manufacturing, stocking, and exporting world-class Incoloy 800H Flanges that comply strictly with international manufacturing standards such as ANSI/ASME B16.5, ASME B16.47, EN 1092-1, and DIN specs.
In this detailed technical guide, we break down every essential metallurgical and commercial parameter of Incoloy 800H flanges—including material standards, chemical composition limits, mechanical properties, pressure rating tables, weight calculation formulas, alloy comparisons, and global export destinations.
1. What Are Incoloy 800H Flanges?
Incoloy 800H Flanges are critical mechanical joining components used to connect pipes, valves, pumps, heat exchangers, and vessel nozzles in high-temperature, high-pressure piping systems. The "H" designation signifies a dual metallurgical enhancement: a controlled carbon range of 0.05% to 0.10% combined with a solution annealing heat treatment performed at temperatures above 1150°C (2100°F). This precise thermal processing develops a coarse grain size (ASTM 5 or coarser), delivering optimum creep-rupture performance where standard stainless steel or lower-grade alloys fail due to thermal fatigue and grain boundary breakdown.
As a leading Incoloy 800H Flanges Exporter in India, Arrow Piping delivers forged flanges in full-bore profiles, including Weld Neck (WN), Slip On (SO), Blind (BL), Socket Weld (SW), Lap Joint (LJ), and Threaded connections designed to withstand severe thermal cycling, carburization, and nitriding atmospheres.
2. Technical Specifications & Material Equivalent Standards
When specifying Incoloy 800H flanges for international project requirements, confirming accurate ASTM, ASME, and ISO standard callouts is essential:
| Specification Standard | Applicable Flange & Material Category |
|---|---|
| ASTM B564 / ASME SB564 | Standard Specification for Nickel Alloy Forged Flanges (UNS N08810) |
| ASTM B408 / ASME SB408 | Nickel-Iron-Chromium Alloy Rod and Bar (Machined Flange Stock) |
| ANSI / ASME B16.5 | Pipe Flanges and Flanged Fittings (NPS 1/2" through NPS 24") |
| ASME B16.47 Series A & B | Large Diameter Steel Flanges (NPS 26" through NPS 60") |
| UNS Designation | UNS N08810 |
| Werkstoff Number (W.Nr.) | 1.4876 / 1.4958 |
| EN Standard | EN 1092-1 Type 01, 02, 05, 11, 12 |
| DIN Standard | DIN 2527, DIN 2573, DIN 2633, DIN 2635 |
3. Chemical Composition Breakdown of Incoloy 800H (UNS N08810)
The superior high-temperature longevity of Incoloy 800H flanges stems directly from its chemistry, balanced precisely to resist phase precipitation during long-term high-temperature exposure:
| Element | Min % | Max % | Metallurgical Influence |
|---|---|---|---|
| Nickel (Ni) | 30.0% | 35.0% | Provides resistance to stress corrosion cracking and stabilizes austenite. |
| Chromium (Cr) | 19.0% | 23.0% | Forms protective oxide layer against high-temperature oxidation & carburization. |
| Iron (Fe) | 39.5% (Bal) | — | Provides structural matrix integrity and economic efficiency. |
| Carbon (C) | 0.05% | 0.10% | Controlled higher carbon content ensures high creep-rupture strength. |
| Aluminum (Al) + Titanium (Ti) | 0.30% | 1.20% | Forms gamma-prime phase for high-temperature strength retention. |
| Manganese (Mn) | — | 1.50% | Improves forgeability and suppresses hot shortness. |
| Silicon (Si) | — | 1.00% | Enhances scaling resistance in oxidizing environments. |
| Sulfur (S) | — | 0.015% | Kept low to avoid hot tearing during hot forging and welding. |
4. Mechanical & Physical Property Profile
Incoloy 800H flanges retain structural integrity across extreme temperature spectrums from cryogenic up to 980°C (1800°F):
| Mechanical / Physical Property | Metric Value | Imperial Value |
|---|---|---|
| Ultimate Tensile Strength (Min) | 450 MPa | 65 ksi |
| Yield Strength (0.2% Offset, Min) | 180 MPa | 25 ksi |
| Elongation at Break (Min) | 30% | 30% |
| Density | 7.94 g/cm³ | 0.287 lb/in³ |
| Melting Range | 1357 – 1385 °C | 2475 – 2525 °F |
| Thermal Conductivity (at 100°C) | 12.3 W/m·K | 85.3 BTU-in/hr-ft²-°F |
| Specific Heat Capacity | 460 J/kg·K | 0.11 BTU/lb-°F |
| Grain Size Requirements | ASTM No. 5 or Coarser (Achieved via Solution Heat Treatment) | |
5. Comparative Analysis: Incoloy 800 vs. Incoloy 800H vs. Incoloy 800HT
Choosing the correct alloy variant prevents cataclysmic high-temperature joint failure. Here is how the three grades compare:
1. Incoloy 800 (UNS N08800):
Standard grade intended for service temperatures up to 600°C (1100°F). It has lower carbon requirements (0.10% max) and is annealed at lower temperatures. Used primarily for general corrosion resistance and moderate thermal exposure.
2. Incoloy 800H (UNS N08810):
Specifically designed for elevated temperatures above 600°C (1100°F). Features a controlled carbon content of 0.05% to 0.10% and high-temperature solution annealing, yielding higher creep and stress-rupture properties.
3. Incoloy 800HT (UNS N08811):
An optimized derivative of 800H. It maintains the same carbon range but restricts the combined Aluminum + Titanium content strictly between 0.85% and 1.20% for maximum long-term stress-rupture behavior under extreme loads.
6. Complete Incoloy 800H Flanges Product Range Exported by Arrow Piping
Arrow Piping manufactures and supplies a comprehensive selection of ASME B16.5 and ASME B16.47 Incoloy 800H flanges tailored to custom pressure ratings and facing finishes (RF, FF, RTJ):
- Incoloy 800H Weld Neck Flanges (WN): Recommended for critical high-pressure, high-temperature process lines where stress concentration must be transferred from the flange to the pipe wall.
- Incoloy 800H Slip On Flanges (SO): Easy-to-align, economical flanges slid over the pipe ends and fillet-welded on both inside and outside faces.
- Incoloy 800H Blind Flanges (BL): Used to seal high-temperature pressure vessel openings, manifold ends, or piping system branches.
- Incoloy 800H Socket Weld Flanges (SW): Designed for small-bore, high-pressure piping systems where smooth internal flow conditions are required.
- Incoloy 800H Threaded / Screwed Flanges (TH): Machined with NPT or BSP threads for low-pressure applications where welding is unsafe or impractical.
- Incoloy 800H Ring Type Joint Flanges (RTJ): Designed with precision metal ring grooves for ultra-high-pressure applications in energy, offshore, and gas process units.
7. ASME B16.5 Pressure Rating & Dimensions Table for Incoloy 800H Flanges
Incoloy 800H flanges are available across Class 150, Class 300, Class 600, Class 900, Class 1500, and Class 2500 pressure ratings. Below is a reference chart for Class 150 & Class 300 ASME B16.5 Weld Neck & Slip On Flanges:
| NPS (Inches) | Outside Diameter (OD) - mm | Class 150 Bolt Circle (mm) | Class 150 No. of Bolts | Class 300 Bolt Circle (mm) | Class 300 No. of Bolts |
|---|---|---|---|---|---|
| 1/2" | 89 mm | 60.3 mm | 4 | 66.7 mm | 4 |
| 1" | 108 mm | 79.4 mm | 4 | 88.9 mm | 4 |
| 2" | 152 mm | 120.7 mm | 4 | 127.0 mm | 8 |
| 3" | 190 mm | 152.4 mm | 4 | 168.3 mm | 8 |
| 4" | 229 mm | 190.5 mm | 8 | 200.0 mm | 8 |
| 6" | 279 mm | 241.3 mm | 8 | 269.9 mm | 12 |
| 8" | 343 mm | 298.5 mm | 8 | 330.2 mm | 12 |
| 12" | 483 mm | 431.8 mm | 12 | 457.2 mm | 16 |
8. Critical Industrial Applications of Incoloy 800H Flanges
Because of its ability to retain creep strength and resist scale formation under extreme cyclic thermal loading, Incoloy 800H flanges are widely specified in severe service industries:
a) Petrochemical & Ethylene Cracking Furnaces
Used in high-temperature pyrolyzer furnace outlet manifolds, transfer line exchangers (TLE), and pigtail assemblies where methane, ethane, or naphtha are cracked at temperatures between 750°C and 900°C.
b) Power Generation & Thermal Power Plants
Integrated into superheater header connections, reheater tubing connections, and high-temperature steam distribution lines in fossil fuel and nuclear power facilities.
c) Hydrocarbon Processing & Reformer Units
Essential for hydrogen reformer outlet piping, steam-methane reformers, and ammonia synthesis plants operating under combined high pressure and high thermal loads.
d) Industrial Heat Treating Equipment
Used in radiant tubes, muffles, retort piping, and thermal processing furnace connections where carburizing and nitriding gases are present.
9. Quality Assurance, Inspection & Material Testing Protocols
Arrow Piping enforces stringent Quality Assurance and Quality Control (QA/QC) procedures on every forged Incoloy 800H flange prior to export:
Our Exhaustive QA/QC Checklist Includes:
- Positive Material Identification (PMI): 100% XRF testing to confirm Ni, Cr, Fe, and Al+Ti percentages on all pieces.
- Dimensional & Facing Verification: Micrometer check of raised face height, bolt hole spacing, flange thickness, and hub tapers.
- Ultrasonic Testing (UT): Volumetric non-destructive evaluation to eliminate internal forging voids or inclusions.
- Microstructural & Grain Size Analysis: Metallographic lab evaluation to confirm ASTM grain size 5 or coarser.
- Mechanical Tensile & Creep Testing: Full destructive testing to confirm compliance with ASTM B564 strength requirements.
- Traceability Certification: Complete EN 10204 3.1 Mill Test Reports with full heat-code identification.
10. Weight Calculation Formula for Incoloy 800H Blind & Slip On Flanges
Procurement managers and freight forwarders can calculate approximate shipping weights for Incoloy 800H Blind Flanges using the following mathematical formula:
Formula for Incoloy 800H Blind Flange Weight:
Weight (kg) = [ (π × D² / 4) × T × Density ] / 1,000,000
Where:
- D = Outer Diameter of Flange in mm
- T = Thickness of Flange in mm
- Density = 7.94 g/cm³ (0.00000794 kg/mm³)
*Note: For Slip On and Weld Neck flanges, subtract the center bore volume and add hub taper masses accordingly.
Why Arrow Piping is the Preferred Incoloy 800H Flanges Exporter in India
As a leading Incoloy 800H Flanges Exporter In India, Arrow Piping delivers unmatched advantages to international buyers:
- Vast Stock & Rapid Global Dispatch: Stocking standard ASME B16.5 Class 150, 300, 600 flanges from 1/2" to 24" ready for quick export shipment.
- Custom Forging Capabilities: Precision ring-rolling and drop-forging capabilities for custom dimensions up to 60" OD according to project drawings.
- Full Documentation Compliance: Comprehensive dossier provided with every shipment including EN 10204 3.1, PMI reports, NDT reports, and Certificate of Origin (COO).
- Export-Grade Seaworthy Packaging: Flanges are wrapped in plastic thread protectors, treated with rust inhibitors, and packed in heavy-duty ISPM-15 heat-treated wooden crates.
Looking for a certified Incoloy 800H Flanges Exporter in India? Request an Immediate Quote from Arrow Piping today. Send your bill of materials (BOM) to our engineering export desk for quick pricing and delivery terms.
11. Global Export Footprint & Supply Network
Arrow Piping regularly exports ASTM B564 Incoloy 800H flanges to key industrial regions around the world:
- Middle East: UAE (Dubai, Abu Dhabi), Saudi Arabia (Jubail, Yanbu), Qatar, Kuwait, Oman, Bahrain.
- Europe: United Kingdom, Germany, Italy, Netherlands, France, Spain.
- North & South America: United States, Canada, Brazil, Mexico, Chile.
- Asia-Pacific & Africa: Singapore, Malaysia, Indonesia, Vietnam, South Africa, Nigeria, Egypt.
Conclusion
Partnering with a dependable Incoloy 800H Flanges Exporter In India like Arrow Piping guarantees high-temperature joint reliability, continuous process safety, and strict compliance with global metallurgical standards. Whether your project requires standard ASME B16.5 Slip On flanges or heavy-wall ASME B16.47 Weld Neck flanges, Arrow Piping provides end-to-end manufacturing and export excellence.
Contact our engineering sales team today at inquiry@arrowpiping.co.in or explore our complete range of high-nickel alloy flanges on our Flanges Product Page.