Hastelloy C276 Flanges Exporter In India
Comprehensive Technical Export Guide to UNS N10276 / W.Nr. 2.4819 Hastelloy C276 Weld Neck, Slip-On, Blind, Socket Weld, Threaded & Lap Joint Flanges Manufactured by Arrow Piping India
Complete Metallurgical & Export Specification Guide for Hastelloy C276 Flanges (UNS N10276 Nickel Alloy Flanges) Exported Worldwide by Arrow Piping
Sourcing high-performance, precision-forged high nickel alloy flange components requires partnering with a certified and experienced Hastelloy C276 Flanges Exporter In India. In critical processing environments—ranging from chemical reactors and flue gas desulfurization units to aggressive sour gas wells—standard stainless steel flanges such as 316L, 317L, or duplex alloys frequently suffer from pitting, crevice corrosion, or stress corrosion cracking (SCC) under extreme thermal and chemical conditions. Hastelloy C276 (UNS N10276 / W.Nr. 2.4819 / ASTM B564) represents the pinnacle of corrosion-resistant superalloy metallurgy. Engineered with a balanced Nickel-Chromium-Molybdenum matrix enhanced with tungsten, Hastelloy C276 offers unmatched resistance to a broad spectrum of aggressive chemical media.
As a leading manufacturer, stockist, and Hastelloy C276 Flanges Exporter In India, Arrow Piping specializes in supplying high-precision metric and imperial flanges designed to handle extreme operational pressures and highly corrosive fluids. Operating from Mumbai, Maharashtra, we manufacture and export complete piping flange solutions—including weld neck, slip-on, blind, socket weld, threaded, lap joint, orifice, and custom CNC-machined forged flanges—to EPC contractors, stockists, and industrial clients across the GCC, Europe, Americas, and Asia-Pacific regions.
1. What Are Hastelloy C276 Flanges & Why Are They Essential?
Hastelloy C276 Flanges are critical mechanical connection components forged or machined from high-purity Hastelloy C276 forged stock or plate material. Unlike standard stainless steels, Hastelloy C276 is designed to resist intergranular corrosion and grain-boundary precipitation during welding, maintaining optimum corrosion performance in the as-welded condition.
The alloy contains ~57% Nickel, 16% Chromium, 16% Molybdenum, 4% Tungsten, and controlled low carbon and silicon levels. These intentional alloying additions impart extraordinary immunity to strong oxidizers (such as ferric and cupric chlorides), wet chlorine gas, hypochlorite solutions, chlorine dioxide, as well as mineral acids like sulfuric, hydrochloric, and phosphoric acid. When specified as Nickel Alloy C276 Flanges, these components deliver outstanding structural stability, preventing catastrophic leaks in high-risk piping networks.
2. International Manufacturing Specifications & Equivalent Standards
When procuring from a Hastelloy C276 Flanges Exporter In India, cross-verifying material specifications ensures complete alignment with project requirements, offshore standards, and international pressure vessel codes:
| Specification Standard | Applicable Product Category & Details |
|---|---|
| ASTM B564 / ASME SB564 | Standard Specification for Nickel Alloy Forgings (Weld Neck, Slip-On, Blind Flanges) |
| ASTM B575 / ASME SB575 | Low-Carbon Nickel-Chromium-Molybdenum Alloy Plate, Sheet, and Strip for Plate Flanges |
| ASME B16.5 | Pipe Flanges and Flanged Fittings (NPS 1/2 through NPS 24 - Class 150 to 2500) |
| ASME B16.47 Series A & B | Large Diameter Steel Flanges (NPS 26 through NPS 60) |
| UNS Designation | UNS N10276 |
| Werkstoff Designation | W.Nr. 2.4819 |
| EN Standard Name | EN NiMo16Cr15W / EN 1092-1 Flanges |
| DIN Standard Equivalent | DIN 2527 (Blind), DIN 2633 (Weld Neck), DIN 2576 (Slip-On) |
| NACE Compliance | NACE MR0175 / ISO 15156 & NACE MR0103 (Sour Service Oil & Gas Environments) |
3. Chemical Composition Breakdown of Hastelloy C276 (UNS N10276)
The outstanding corrosion immunity and structural load capabilities of Hastelloy C276 flanges are governed by its precise chemical formulation:
| Chemical Element | Minimum (%) | Maximum (%) | Metallurgical Role & Engineering Benefit |
|---|---|---|---|
| Nickel (Ni) | Remainder (~57%) | — | Provides core metallic matrix; provides extreme resistance to stress corrosion cracking and reducing chemicals. |
| Chromium (Cr) | 14.50% | 16.50% | Imparts resistance to oxidizing environments, hot nitric acid, chromic acid, and high-temp oxidation. |
| Molybdenum (Mo) | 15.00% | 17.00% | Provides exceptional resistance to localized pitting, crevice corrosion, and reducing acids like HCl and H2SO4. |
| Tungsten (W) | 3.00% | 4.50% | Enhances pitting resistance, repassivation dynamics, and overall structural durability in harsh media. |
| Iron (Fe) | 4.00% | 7.00% | Maintains structural stability and solid solution strengthening. |
| Cobalt (Co) | — | 2.50% | Improves thermal stability and mechanical retention at elevated temperatures. |
| Manganese (Mn) | — | 1.00% | Improves forgeability and acts as a deoxidizer during melting. |
| Vanadium (V) | — | 0.35% | Refines grain boundary structures to enhance mechanical strength. |
| Carbon (C) | — | 0.010% | Ultra-low carbon minimizes carbide precipitation in heat-affected zones during flange welding. |
| Silicon (Si) | — | 0.080% | Ultra-low silicon prevents intermetallic phase formation, maintaining corrosion resistance post-welding. |
| Phosphorus (P) | — | 0.040% | Kept low to ensure high weldability and prevent grain boundary embrittlement. |
| Sulfur (S) | — | 0.030% | Strictly controlled to ensure high ductility and optimal impact energy values. |
4. Mechanical & Physical Property Profile
Engineers specifying flanges for high-pressure chemical lines, pressure vessel nozzles, and offshore piping systems must verify load-bearing limits. As a trusted Hastelloy C276 Flanges Exporter In India, Arrow Piping ensures all exported batches meet or exceed the following mechanical standards:
| Mechanical / Physical Property | Metric Units (SI) | Imperial Units |
|---|---|---|
| Ultimate Tensile Strength (UTS) | 690 MPa (Min) | 100 ksi (Min) |
| 0.2% Proof Yield Strength | 283 MPa (Min) | 41 ksi (Min) |
| Elongation at Break (A5) | 40% (Min) | 40% (Min) |
| Hardness (Rockwell B / Brinell) | 100 HRB Max / 240 HBW Max | 100 HRB Max / 240 HBW Max |
| Charpy V-Notch Impact Energy (Room Temp) | 150 Joules (Avg Min) | 110 ft-lbs (Avg Min) |
| Density | 8.89 g/cm³ | 0.321 lb/in³ |
| Modulus of Elasticity (20°C) | 205 GPa | 29.8 x 10⁶ psi |
| Thermal Conductivity (at 100°C) | 11.1 W/m·K | 77 BTU-in/hr-ft²-°F |
| Electrical Resistivity | 1.30 µΩ·m | 782 ohm·circ mil/ft |
| Melting Point Range | 1325 – 1370 °C | 2415 – 2500 °F |
5. Deep-Dive Comparison: Hastelloy C276 vs. Inconel 625 vs. Stainless Steel 316L
Selecting the correct flange alloy prevents severe corrosion failures in aggressive chemical handling operations. Here is a quick metallurgical evaluation:
1. Hastelloy C276 (UNS N10276 / 2.4819):
A premier Nickel-Chromium-Molybdenum superalloy containing 16% Mo and 4% W. Designed for extreme chemical environments where combinations of strong acids, high chlorides, and severe pitting hazards exist. Unmatched performance in wet chlorine, ferric chloride, and mixed acid systems.
2. Inconel 625 (UNS N06625 / 2.4856):
A High-Nickel (58%) Chromium (21%) Molybdenum (9%) alloy fortified with Niobium (3.6%). Excellent for high-temperature oxidation resistance, marine subsea service, and organic acids, but slightly less resistant to severe reducing hydrochloric acid solutions than C276.
3. Stainless Steel 316L (UNS S31603 / 1.4404):
Standard austenitic stainless steel with 17% Cr, 12% Ni, and 2.5% Mo. While economical for general service, 316L rapidly succumbs to pitting, crevice corrosion, and stress corrosion cracking when exposed to hot chloride solutions or concentrated mineral acids.
6. Complete Range of Hastelloy C276 Flanges Exported by Arrow Piping
As a full-spectrum Hastelloy C276 Flanges Exporter In India, we manufacture and export an extensive catalog of standard, non-standard, and custom flanges manufactured strictly per ANSI, ASME, DIN, ISO, BS, and EN standards:
| Flange Category | Available Types & Configurations | Dimensional Standards |
|---|---|---|
| Hastelloy C276 Weld Neck Flanges (WNF) | Standard Bore, Extra Heavy Bore, Schedule 10S to SCH 160/XXS, Long Weld Neck (LWN) | ASME B16.5, ASME B16.47, DIN 2633, EN 1092-1 Type 11 |
| Hastelloy C276 Slip-On Flanges (SOF) | Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ), Hubbed Slip-On | ASME B16.5, DIN 2576, EN 1092-1 Type 12 |
| Hastelloy C276 Blind Flanges (BLRF) | Raised Face Blind, Flat Face Blind, Ring Type Joint Blind (RTJ), Spectacle Blind, Spacers & Paddle Blinds | ASME B16.5, ASME B16.48, DIN 2527, EN 1092-1 Type 05 |
| Hastelloy C276 Socket Weld Flanges (SWF) | Raised Face Socket Weld, Flat Face Socket Weld, High-Pressure SW Flanges | ASME B16.5, EN 1092-1 Type 14 |
| Hastelloy C276 Threaded Flanges (THDF) | NPT Threaded, BSPT Threaded, Male/Female Threaded Flanges | ASME B16.5, DIN 2566, EN 1092-1 Type 13 |
| Hastelloy C276 Lap Joint & Special Flanges | Lap Joint Flanges with Stub Ends, Orifice Flanges, Reducing Flanges, Custom CNC Machined Forged Rings | ASME B16.5, ASME B16.36, Custom Blueprints |
7. Pressure Class Ratings & Flange Facing Types for Hastelloy C276 Flanges
Because Hastelloy C276 retains high mechanical strength and corrosion resistance under elevated pressure and temperature regimes, flanges are produced across comprehensive ASME pressure classes:
| ASME Pressure Class | DIN / EN Pressure Rating | Primary Flange Facing Types Available | Typical Application Environment |
|---|---|---|---|
| Class 150 | PN 6 / PN 10 / PN 16 | Raised Face (RF), Flat Face (FF) | Low-pressure chemical transfer lines, utility piping |
| Class 300 | PN 25 / PN 40 | Raised Face (RF), Tongue & Groove (T&G) | Medium-pressure process reactors, heat exchangers |
| Class 600 | PN 63 / PN 100 | Raised Face (RF), Ring Type Joint (RTJ) | High-pressure chemical processing, oilfield headers |
| Class 900 | PN 160 | Ring Type Joint (RTJ), Male & Female (M&F) | Sour gas processing, high-pressure injection lines |
| Class 1500 | PN 250 | Ring Type Joint (RTJ) | Severe high-pressure offshore subsea manifolds |
| Class 2500 | PN 400 | Ring Type Joint (RTJ) Heavy Duty | Ultra-high-pressure chemical reaction systems |
*Assembly Note: When installing Hastelloy C276 flanges, ensure appropriate gasket selection (such as PTFE-envelope or Hastelloy C276 spiral wound gaskets with compatible anti-seize bolting) to prevent galvanic interaction and leakage.
8. Critical Industrial Applications Worldwide
As a leading Hastelloy C276 Flanges Exporter In India, Arrow Piping exports UNS N10276 flanges to high-stress industrial applications across the globe:
a) Chemical Processing & Fine Chemical Synthesis
Hastelloy C276 weld neck and slip-on flanges are extensively deployed in chemical reactors, reboilers, evaporators, and piping headers. They handle aggressive organic and inorganic solutions including hot acetic acid, formic acid, mixed sulfuric/hydrochloric streams, and chlorinated solvents without localized attack.
b) Flue Gas Desulfurization (FGD) Systems & Power Plants
Power generation scrubbers process highly corrosive sulfur dioxide flue gases containing condensed chlorides and sulfuric acid. Hastelloy C276 blind and lap joint flanges resist acid condensation and severe crevice corrosion in absorber towers and ductwork.
c) Pulp & Paper Bleaching Operations
Bleach plants in pulp production utilize strong oxidizing chemicals like chlorine dioxide (ClO2), sodium hypochlorite, and wet chlorine gas. Hastelloy C276 flanges provide long-term operational integrity where traditional stainless steel alloys suffer rapid failure.
d) Oil & Gas Sour Gas Handling (NACE Service)
Compliant with NACE MR0175 / ISO 15156, Hastelloy C276 forged flanges are essential for downhole, wellhead, and refinery components exposed to sour environments containing high concentrations of hydrogen sulfide (H2S), carbon dioxide (CO2), and elemental sulfur.
9. Comprehensive Quality Assurance, Testing & Export Traceability
At Arrow Piping, quality control is central to our manufacturing and export operations. Every export shipment of Hastelloy C276 flanges undergoes rigorous testing before dispatch to ensure zero site defects.
Our Rigorous QA/QC Testing Protocol Includes:
- PMI Testing (Positive Material Identification): 100% XRF spectro-analysis on all flange lots to verify Ni (~57%), Cr (16%), Mo (16%), and W (4%) chemistry.
- Dimensional & Facing Verification: Machining tolerance and flange face serration checks (125-250 AARH finish) per ASME B16.5 / B16.47.
- Non-Destructive Testing (NDT): Ultrasonic Testing (UT) for internal forging defects and Dye Penetrant Inspection (DP) for surface integrity.
- Intergranular Corrosion Testing: Corrosion rate evaluation via ASTM G28 Method A to guarantee resistance to intergranular attack.
- Hydrostatic Pressure Testing: Proof pressure testing of flange bodies to ensure zero leakage under rated pressure limits.
- Mechanical & Tensile Testing: Destruction tensile, yield, and hardness tests carried out per ASTM B564 / ASTM E8 standards.
- Mill Test Certification: Fully compliant EN 10204 3.1 certification accompanied by third-party inspection reports (TUV, DNV, SGS, BV, Lloyds).
10. Weight Estimation & Shipping Weight Formula for Hastelloy C276 Flanges
To assist logistics managers and structural piping engineers in estimating freight tonnage, use the accurate mathematical formula below for Hastelloy C276 steel flanges:
Formula for Approximate Plate Flange Weight:
Weight (kg) = [ π × (OD² - ID²) × Thickness × Density ] / 4000000
Where:
- OD = Flange Outer Diameter in mm
- ID = Flange Inner Bore Diameter in mm
- Thickness = Flange Total Thickness in mm
- Density = 8.89 g/cm³ (0.00000889 kg/mm³)
Engineering Note: For Weld Neck Flanges, include additional mass allowances for hub taper and raised face height.
11. Factors Influencing Hastelloy C276 Flanges Price & Export Costs
When requesting quotes from a Hastelloy C276 Flanges Exporter In India, several key technical factors influence the final unit price:
- Raw Material Market Tonnage: High nickel alloy costs fluctuate based on international LME prices of Nickel, Molybdenum, and Tungsten.
- Flange Type & Pressure Class: Higher pressure classes (Class 900 to 2500) and complex hub geometries (Weld Neck, Long Weld Neck) require more raw material forging weight and extended machining time.
- Forging vs. Plate Construction: Seamless forged flanges per ASTM B564 vs. cut plate flanges per ASTM B575.
- Inspection & Testing Requirements: Additional third-party witness testing (TUV, DNV, Bureau Veritas) or ASTM G28 intergranular corrosion tests.
- Export Packaging Standards: Heavy-duty ISPM-15 certified wooden crates with vacuum anti-corrosion barrier wrapping and protective end caps.
Why Choose Arrow Piping as Your Hastelloy C276 Flanges Exporter In India?
Partnering with Arrow Piping as your preferred Hastelloy C276 Flanges Exporter In India delivers key commercial and engineering advantages:
- Extensive Ready Stock Inventory: Large export-ready stock of standard ASTM B564 UNS N10276 weld neck, slip-on, blind, and socket weld flanges for rapid dispatch.
- In-House Precision Machining: Advanced CNC vertical turning lathes (VTL) capable of custom serrations, heavy wall hubs, and special dimensions per customer drawings.
- Complete Export Documentation Support: EN 10204 3.1 MTC, Certificate of Origin (COO), Chamber of Commerce attestation, Bill of Lading, and customized packing lists.
- Seaworthy Protective Packaging: All exported flanges feature plastic flange face protectors, VCI anti-rust wrapping, and are packed securely in wooden cases built for oceanic transit.
Looking for a certified Hastelloy C276 Flanges Exporter In India? Request an Immediate Export Quote from Arrow Piping today. Send your detailed bill of materials and technical drawings to our export desk for factory pricing and fast global delivery.
12. Global Export Destinations & Supply Network
Arrow Piping routinely exports Hastelloy C276 high nickel alloy flanges from Mumbai, India, to major industrial centers around the world:
- Middle East & GCC Countries: United Arab Emirates (Dubai, Abu Dhabi), Saudi Arabia (Jubail, Yanbu), Qatar (Doha), Kuwait, Oman (Muscat), Bahrain.
- Europe: United Kingdom, Germany, Netherlands (Rotterdam), Italy, Norway (Stavanger), France, Spain.
- Americas: United States (Houston, New Orleans), Canada, Brazil, Mexico, Chile.
- Asia-Pacific & Africa: Singapore, Malaysia, Australia (Perth), South Africa, Nigeria, Vietnam, Indonesia.
Conclusion
Selecting a verified, highly capable Hastelloy C276 Flanges Exporter In India like Arrow Piping guarantees metallurgical compliance, precise dimensional tolerances, and dependable corrosion performance for your most demanding global projects. With exceptional tensile strength, severe chemical resistance, and complete international compliance certification, Hastelloy C276 flanges supplied by Arrow Piping offer ultimate operational reliability.
Contact our export engineering sales team today at inquiry@arrowpiping.co.in or explore our complete flanges product line on our Flanges Product Page.