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Hastelloy C276 Flanges are high-performance nickel-molybdenum-chromium alloy flanges designed to withstand extreme corrosion and high-temperature environments. These flanges are widely used in chemical processing, pollution control, and marine applications due to their exceptional resistance to oxidizing and reducing agents.
Manufactured according to international standards such as ASTM B574, ASME B16.5, and DIN, Hastelloy C276 Flanges are available in various types including weld neck, slip-on, blind, socket weld, and threaded flanges. This ensures compatibility with different piping systems and industrial requirements.
The superior corrosion resistance of Hastelloy C276 Flanges makes them ideal for handling aggressive chemicals, acids, and chlorine compounds. They maintain mechanical strength and structural integrity even at elevated temperatures, making them suitable for chemical reactors and heat exchangers.
These flanges are fabricated with precision using advanced forging and machining techniques. Each flange undergoes strict quality control tests such as radiographic inspection, ultrasonic testing, and hardness checks to ensure durability and performance under extreme conditions.
Hastelloy C276 Flanges offer excellent resistance to pitting, stress corrosion cracking, and crevice corrosion. Their unique chemical composition enhances longevity, reduces maintenance costs, and ensures reliable performance in industries such as oil & gas, chemical processing, pharmaceuticals, and wastewater treatment.
Available in both standard and custom sizes, Hastelloy C276 Flanges can be supplied in various pressure ratings from Class 150 to Class 2500. This flexibility allows engineers to select the right flange for specific piping requirements and operating conditions.
These flanges can also be customized with special finishes, including polished or machined surfaces, to meet specific application needs. They are compatible with different gasket materials to ensure leak-proof connections and optimal sealing performance.
Hastelloy C276 Flanges are designed for easy installation and long-term reliability. Their high strength-to-weight ratio, combined with exceptional corrosion resistance, ensures minimal downtime and extended service life in critical industrial applications.
Trusted globally, Hastelloy C276 Flanges are preferred in industries where safety, reliability, and performance are paramount. Their adaptability to harsh chemical environments makes them an essential component in modern piping systems.
Specification Table
| Standard | Flange Type | Size Range | Pressure Rating | Material Grade |
|---|---|---|---|---|
| ASME B16.5 / B16.47 | Weld Neck Flange | 1/2" – 48" | Class 150 – 2500 | Hastelloy C276 |
| ASME B16.5 / B16.47 | Slip-On Flange | 1/2" – 48" | Class 150 – 2500 | Hastelloy C276 |
| ASME B16.5 | Blind Flange | 1/2" – 48" | Class 150 – 2500 | Hastelloy C276 |
| ASME B16.5 | Socket Weld Flange | 1/2" – 24" | Class 150 – 900 | Hastelloy C276 |
| ASME B16.5 | Threaded Flange | 1/2" – 24" | Class 150 – 900 | Hastelloy C276 |
Chemical Composition (Typical ranges for SSK400)
Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 57 min |
| Molybdenum (Mo) | 15 – 17 |
| Chromium (Cr) | 14.5 – 16.5 |
| Iron (Fe) | 4 max |
| Cobalt (Co) | 3 max |
| Manganese (Mn) | 1 max |
| Silicon (Si) | 0.08 – 0.5 |
| Carbon (C) | 0.01 max |
| Tungsten (W) | 3 – 4.5 |
| Phosphorus (P) | 0.04 max |
| Sulfur (S) | 0.03 max |
Mechanical Properties (Typical)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength (Ultimate) | 70 – 90 | ksi |
| Yield Strength (0.2% Offset) | 30 – 45 | ksi |
| Elongation (in 2 inches) | 40 – 50 | % |
| Hardness (HRB) | 70 – 95 | HRB |
| Modulus of Elasticity | 28 | ×10³ ksi |
| Density | 8.9 | g/cm³ |
| Melting Point | 1390 – 1440 | °C |
| Impact Strength (Charpy V-notch) | 25 – 35 | J |
Equivalent Grades
| Standard / Specification | Equivalent Grade |
|---|---|
| ASTM B574 | C276 |
| ASME SB574 | C276 |
| UNS | N10276 |
| EN / DIN | 2.4819 |
| JIS | Hastelloy C-276 |
| ISO | C276 |
Dimension & Weight Chart (Selected common sizes)
Below is a representative chart showing outside diameter, wall thickness, inside diameter, cross-sectional area of metal and calculated weight per metre (kg/m). Values are calculated using density = 7.93 g/cm³ and are for guidance — use actual MTC values for procurement & engineering.
| Nominal Size (inch) | Outside Diameter (OD) mm | Bolt Circle Diameter (BCD) mm | Bolt Hole Diameter mm | Flange Thickness mm | Weight (kg) |
|---|---|---|---|---|---|
| 1/2" | 95 | 70 | 14 | 16 | 0.9 |
| 1" | 120 | 90 | 14 | 18 | 1.5 |
| 2" | 150 | 125 | 18 | 19 | 2.8 |
| 4" | 230 | 190 | 18 | 22 | 5.7 |
| 6" | 285 | 240 | 22 | 24 | 9.2 |
| 8" | 345 | 295 | 22 | 26 | 14.0 |
| 10" | 405 | 355 | 26 | 28 | 19.8 |
| 12" | 470 | 405 | 26 | 30 | 27.0 |
| 16" | 595 | 520 | 30 | 34 | 45.0 |
| 24" | 760 | 670 | 34 | 38 | 80.0 |
Common Types Of Flangess
Ring Flanges
Type of Flanges
General Flanges
Stainless 400 Pipe Flanges
ASME B16.5 Flanges
Stainless 400 Flanges
Frequently Asked Questions (FAQ)
What are Hastelloy C276 Flanges?
Hastelloy C276 Flanges are corrosion-resistant nickel-molybdenum-chromium alloy flanges designed for extreme chemical and high-temperature environments. They are widely used in chemical processing, marine, and pollution control industries.
What types of Hastelloy C276 Flanges are available?
Common types include Weld Neck, Slip-On, Blind, Socket Weld, and Threaded Flanges. These flanges are manufactured according to standards like ASME B16.5, B16.47, and ASTM B574.
What are the key features of Hastelloy C276 Flanges?
They offer excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. They maintain mechanical strength at high temperatures and are suitable for harsh chemical environments.
What industries use Hastelloy C276 Flanges?
They are widely used in chemical processing, oil & gas, pharmaceuticals, wastewater treatment, and marine applications due to their superior corrosion resistance and durability.
What pressure ratings are available for Hastelloy C276 Flanges?
These flanges are available in pressure classes ranging from Class 150 to Class 2500, accommodating various piping and industrial requirements.
Pipes & Tubes Supplier
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