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Hastelloy C276 Pipe Fittings are premium alloy components designed for superior performance in highly corrosive environments. Made from nickel-molybdenum-chromium alloys with tungsten, these fittings offer exceptional resistance to pitting, stress corrosion cracking, and oxidizing and reducing media. They are widely used in chemical processing, pollution control, and marine applications where durability and reliability are critical.

These fittings are available in various types including elbows, tees, reducers, and flanges, catering to the diverse requirements of piping systems. Each fitting is manufactured to strict industry standards, ensuring precise dimensions, high mechanical strength, and long-lasting performance. Hastelloy C276’s versatility makes it suitable for both welded and threaded connections in complex piping networks.

Hastelloy C276 pipe fittings are high-performance nickel-molybdenum-chromium alloys designed for the most corrosive industrial environments. Known for their exceptional resistance to oxidizing and reducing agents, these fittings are widely used in chemical processing, pollution control, marine, and pharmaceutical industries. They provide long-term reliability in systems handling aggressive chemicals and high-pressure fluids.

Hastelloy C276 contains approximately 57% nickel, 16% molybdenum, 15% chromium, and small amounts of iron, cobalt, and tungsten. This unique composition ensures outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking in both oxidizing and reducing media. Its chemical makeup allows it to withstand strong acids such as sulfuric, hydrochloric, and phosphoric acid.

Hastelloy C276 Pipe Fittingss and Fittingss

The corrosion-resistant properties of Hastelloy C276 make it ideal for handling aggressive chemicals such as hydrochloric acid, sulfuric acid, and chlorine compounds. Its resistance to oxidizing and reducing agents ensures a long service life, reducing maintenance costs and downtime in industrial processes. This makes C276 pipe fittings a cost-effective choice for chemical plants, refineries, and offshore installations.

Hastelloy C276 Pipe Fittings also perform well under high-temperature conditions, maintaining structural integrity and resisting deformation. The alloy’s high tensile and yield strength provide reliability under pressure, making it suitable for both high-pressure and high-temperature piping applications. Additionally, these fittings comply with ASTM and ASME standards, ensuring quality assurance and global compatibility.

C276 fittings exhibit excellent mechanical properties, including a tensile strength of around 690–760 MPa and a yield strength of 310–380 MPa. Elongation typically ranges from 30–40%, providing ductility and flexibility for high-pressure piping systems. These properties make C276 fittings suitable for demanding industrial applications where both strength and corrosion resistance are essential.

The hallmark of Hastelloy C276 is its superior corrosion resistance. These fittings resist pitting, crevice corrosion, and stress corrosion cracking, even in chloride-rich or oxidizing environments. This makes them ideal for chemical processing, seawater handling, and other applications where standard stainless steels or nickel alloys would fail.

Specification Table

Hastelloy C276 Pipe Fittings Specification Summary
Specification Summary: Hastelloy C276 Pipe Fittings
Specification Standard Material Sizes (NPS) Pressure Rating End Connection
Pipe Elbows ASME B16.9 / ASTM B574 Hastelloy C276 (Ni-Mo-Cr-W Alloy) 1/2" – 48" 150# – 2500# Butt Weld / Threaded / Socket Weld
Pipe Tees ASME B16.9 / ASTM B574 Hastelloy C276 1/2" – 48" 150# – 2500# Butt Weld / Threaded
Reducers ASME B16.9 / ASTM B574 Hastelloy C276 1/2" – 48" 150# – 2500# Butt Weld
End Caps ASME B16.9 / ASTM B574 Hastelloy C276 1/2" – 48" 150# – 2500# Butt Weld / Threaded
Flanges ASME B16.5 / ASTM B564 Hastelloy C276 1/2" – 48" 150# – 2500# Weld Neck / Slip-On / Blind / Socket Weld

Chemical Composition (Typical ranges for SSS32760)

Note: Values are typical ranges. Final composition will be confirmed on MTC provided per lot.

Element Min (%) Max (%)
Carbon (C) - 0.02
Manganese (Mn) - 0.50
Silicon (Si) - 0.50
Phosphorus (P) - 0.04
Sulfur (S) - 0.03
Nickel (Ni) 57.0 63.0
Molybdenum (Mo) 15.0 17.0
Chromium (Cr) 14.5 16.5
Tungsten (W) 3.0 4.5
Cobalt (Co) - 2.0

Mechanical Properties (Typical)

Property Unit Value
Density g/cm³ 8.9
Melting Point °C 1390 – 1425
Tensile Strength (Ultimate) MPa 550 – 750
Yield Strength (0.2% Offset) MPa 275 – 380
Elongation % 40 – 50
Hardness (Brinell, HB) HB 150 – 200
Modulus of Elasticity GPa 207
Poisson's Ratio - 0.31

Equivalent Grades

Country / Standard Equivalent Grade
ASTM / ASME (USA) B574 C276
UNS (USA) N10276
EN / DIN (Europe) 2.4819
JIS (Japan) NCF 601
Werkstoff (Germany) 2.4819

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 (NPS) Outside Diameter (OD, mm) Wall Thickness (Schedule) Weight per Piece (kg)
1/2" 21.3 Sch 40 / 80 0.50 / 0.65
1" 33.4 Sch 40 / 80 1.20 / 1.45
2" 60.3 Sch 40 / 80 3.20 / 3.80
4" 114.3 Sch 40 / 80 9.50 / 11.20
6" 168.3 Sch 40 / 80 17.50 / 20.30
8" 219.1 Sch 40 / 80 29.50 / 34.00
10" 273.0 Sch 40 / 80 45.50 / 52.20
12" 323.9 Sch 40 / 80 65.00 / 74.00

Types Of Hastelloy C276 Pipe Fittingss and Fittingss

Seamless Pipe

SS S32760 Seamless Pipe

Welded Pipe

SS S32760 Welded Pipe

ERW Pipe

SS S32760 ERW Pipe

EFW Pipe

SS S32760S EFW Pipe

Seamless Fittings

Low Temperature Carbon Steel A333S Seamless Fittings

Welded Fittings

S32760H Super Duplex Steel Welded Fittings

Capillary Fittings

S32760 Super Duplex Steel Capillary Fittings

Heat Exchanger Fittingss

S32760H Super Duplex Steel Heat Exchanger Fittingss

Frequently Asked Questions (FAQ)

1. What is Hastelloy C276 Pipe Fittings used for?

Hastelloy C276 Pipe Fittings are primarily used in chemical, petrochemical, marine, and pollution control industries where corrosion resistance is critical. They are suitable for handling oxidizing and reducing agents, acids, and chlorides.

2. What types of Hastelloy C276 Pipe Fittings are available?

Common types include elbows, tees, reducers, end caps, and flanges. They are available in various sizes, pressure ratings, and end connections such as butt weld, socket weld, and threaded.

3. What are the key properties of Hastelloy C276?

Hastelloy C276 has excellent resistance to pitting, stress corrosion cracking, and oxidation. It also maintains mechanical strength under high temperatures and high pressures, making it ideal for demanding industrial applications.

4. Which standards do Hastelloy C276 Pipe Fittings comply with?

These fittings comply with international standards including ASTM B574, ASME B16.9 for fittings, ASTM B564 for flanges, and UNS N10276 for the alloy material. Equivalent grades exist in EN/DIN, JIS, and Werkstoff standards.

5. How should Hastelloy C276 Pipe Fittings be maintained?

Regular inspection for signs of corrosion, proper cleaning, and avoiding exposure to incompatible chemicals help extend the service life. Proper installation according to standard piping practices is also essential.

Pipes & Fittingss Supplier

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