Kanakratna Steelage Private Limited

Introduction

Hastelloy is a trademarked name for a family of corrosion-resistant metal alloys primarily composed of nickel, molybdenum, iron, and chromium. Among the many forged fittings made from Hastelloy, the forged tee stands out as a crucial component used to divert or combine fluid flow within piping systems. Whether in chemical processing, petrochemical refining, power generation, or marine environments, Hastelloy forged tees deliver exceptional performance where aggressive corrosion and extreme temperatures prevail.

This comprehensive guide covers the chemical composition, mechanical properties, manufacturing processes, types, industry applications, specifications, and advantages of Hastelloy forged tees. It aims to support informed material selection and design decision-making for critical piping systems.

The most commonly used Hastelloy grades 

 

• Hastelloy C-276 (UNS N10276): Known for universal corrosion resistance, especially against oxidizing and reducing agents.

• Hastelloy C-22 (UNS N06022): Superior resistance to crevice corrosion, pitting, and stress corrosion cracking.

• Hastelloy X (UNS N06002): High-temperature strength and oxidation resistance.

• Hastelloy B2 (UNS N10665): Excellent resistance to hydrochloric acid and other strong reducing media.

 What is a Forged Tee?

A forged tee is a pipe fitting shaped like the letter 'T' used to combine or split the flow of fluids in a piping system. It has three openings:

• One inlet and two outlets (for branching flow)

• Or two inlets and one outlet (for converging flow)

Chemical Composition Mechanical Properties Heat Treatment

• Dissolve carbides and secondary phases

• Restore ductility

• Relieve residual stresses

Standards and Specifications

 

• ASTM B564: Standard for Nickel Alloy Forgings (including C-276, C-22)

• ASME B16.11: Forged fittings, socket weld and threaded

• MSS-SP-79/95/97: Socket weld and threaded fittings

• NACE MR0175 / ISO 15156: For sour gas applications

• API 6A: High-pressure oilfield equipment (when applicable)

Additional Information:

• Production Capacity: IN TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

Introduction

Hastelloy B-2 Fittings are engineered components designed for pipework and equipment systems requiring exceptional resistance to strong reducing agents, especially hydrochloric acid (HCl) across all concentrations and temperatures. Made from nickel-molybdenum alloy Hastelloy B-2 (UNS N10665), these fittings excel in highly corrosive chemical processing, petrochemical, pharmaceutical, marine, and pollution control industries.

Hastelloy B-2 Fittings are manufactured in multiple forms, including:

• Elbows (45°, 90°)

• Tees & Crosses

• Reducers (Concentric, Eccentric)

• Caps, Stub Ends

• Couplings & Unions

These fittings are crucial where process integrity, leak-proof performance, and corrosion resistance are paramount.

 Mechanical Properties

Hastelloy B-2 Fittings provide excellent mechanical strength even under high stress and corrosive conditions.

Chemical Composition of Hastelloy B-2 (UNS N10665)

Hastelloy B-2 is a nickel-molybdenum alloy designed specifically for resistance to reducing conditions.

Testing & Quality Control

• Hydrostatic Testing – Ensures leak-proof performance.

• Ultrasonic Inspection – Detects internal flaws.

• Eddy Current Testing – Surface defect detection.

• Positive Material Identification (PMI) – Confirms alloy chemistry.

• Corrosion Testing – ASTM G28 (intergranular corrosion).

.Applications of Hastelloy B-2 Fittings.
.Chemical Processing
.Oil & Gas Industry
.Pharmaceutical & Biotechnology
.Marine & Pollution Control
.Power Generation

Additional Information:

• Production Capacity: in kgs
• Delivery Time: ready stock
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

Introduction

Hastelloy socket weld flanges are a type of high-performance forged flange designed for small-diameter, high-pressure piping systems. They are specifically engineered for pipelines where leak-proof, strong, and corrosion-resistant connections are critical. Unlike slip-on flanges, socket weld flanges feature a socket-like recess into which the pipe is inserted before fillet welding, ensuring strong joint integrity.

When manufactured from Hastelloy alloys (nickel-molybdenum-chromium family), these flanges exhibit outstanding corrosion resistance in both oxidizing and reducing environments. They are widely used in chemical processing, petrochemicals, oil & gas, pharmaceuticals, marine, and power generation industries, where equipment faces chlorides, strong acids, oxidizing agents, and high-temperature exposure.

Chemical Composition (Typical for C276)

 

• Nickel: Balance (~57%)

• Molybdenum: 15–17%

• Chromium: 14.5–16.5%

• Iron: 4–7%

• Tungsten: 3–4.5%

• Cobalt: ≤ 2.5%

• Carbon: ≤ 0.01%

Mechanical Properties (Typical) Testing & Quality Control

• Visual & Dimensional Inspection.

• Hydrostatic & Pneumatic Pressure Testing.

• Non-Destructive Testing (NDT): Ultrasonic, Radiographic, Dye Penetrant.

• Positive Material Identification (PMI).

• Corrosion Resistance Testing in simulated service conditions.

Manufacturing Process of Hastelloy Socket Weld Flanges

1. Raw Material Selection – Hastelloy billets/forgings prepared.

2. Forging – Billets shaped into flange blanks using hydraulic presses.

3. Heat Treatment (Annealing) – Restores corrosion resistance and ductility.

4. CNC Machining – Drilling bolt holes, socket formation, facing.

5. Surface Treatment – Pickling, passivation, or polishing.

6. Inspection & Testing – Ensures compliance with ASTM/ASME standards.

Dimensions of Socket Weld Flanges

As per ASME B16.5:

• Size Range: ½” to 24”.

• Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500.

• Facing Types: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ).

• Bore: Matches pipe OD, with socket depth of ~1.6 mm (1/16”).

Additional Information:

• Production Capacity: IN TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

Introduction

Hastelloy slip-on flanges are high-performance piping components made from the nickel-molybdenum-chromium superalloy family known as Hastelloy. Designed to be slipped over a pipe and welded at both the inside and outside, slip-on flanges provide a secure, leak-proof, and durable connection for pipelines in critical industries.

Unlike standard stainless steel or carbon steel flanges, Hastelloy slip-on flanges exhibit superior resistance to both oxidizing and reducing environments, making them highly suitable for chemical processing, petrochemical refining, marine environments, power generation, and aerospace applications.

The butt-welding and fillet welding capability of slip-on flanges ensures better alignment, reduced installation time, and excellent durability.

hemical Composition (Typical)C276

• Nickel: Balance (~57%)

• Molybdenum: 15–17%

• Chromium: 14–16.5%

• Iron: 4–7%

• Tungsten: 3–4.5%

• Cobalt: ≤ 2.5%

C22

• Nickel: Balance (~56%)

• Chromium: 20–22.5%

• Molybdenum: 12.5–14.5%

• Tungsten: 2.5–3.5%

• Iron: 2–6%

B2

 

• Nickel: Balance

• Molybdenum: 26–30%

• Iron: ≤ 2%

Mechanical Properties  Inspection & Testing

• Non-destructive tests: Ultrasonic, radiographic, magnetic particle.

• Hydrostatic tests: Verifies leak-proof integrity.

• Mechanical tests: Tensile, hardness, elongation.

• Corrosion tests: Pitting and intergranular corrosion resistance.

• PMI (Positive Material Identification): Confirms alloy grade.

Welding & Fabrication

• Suitable welding techniques: GTAW (TIG), SMAW, GMAW.

• Always use matching Hastelloy filler materials.

• Preheating not required, but post-weld heat treatment may be applied.

• Proper edge preparation ensures stronger welds.

Design & Features of Slip-On Flanges

• Slip-fit design allows easy installation.

• Requires two welds (inner and outer fillet weld).

• Suitable for low-to-medium pressure pipelines.

• Provides better hub support than lap-joint flanges.

• Available in raised face (RF), flat face (FF), and ring-type joint (RTJ) ends.

Additional Information:

• Production Capacity: 50 TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

 Introduction

Hastelloy stub ends are critical piping components designed to be used with lap joint flanges to form a high-performance, corrosion-resistant, and easily replaceable flange connection. Unlike conventional welded flanges, stub ends allow the flange to rotate freely around the pipe, simplifying bolt alignment, assembly, and disassembly in pipelines.

Manufactured from nickel-molybdenum-chromium superalloys, Hastelloy stub ends are specifically engineered to withstand aggressive chemical environments, oxidizing and reducing agents, and high temperatures. These qualities make them invaluable in industries such as chemical processing, petrochemicals, pharmaceuticals, marine engineering, pulp & paper, and power generation.

Chemical Composition (Typical for C276)

 

• Nickel: Balance (~57%)

• Molybdenum: 15–17%

• Chromium: 14.5–16.5%

• Iron: 4–7%

• Tungsten: 3–4.5%

• Cobalt: ≤ 2.5%

• Carbon: ≤ 0.01%

 Mechanical Properties (Typical)  Testing & Quality Assurance

• Mechanical Testing: Tensile, hardness, and elongation.

• Non-Destructive Testing (NDT): Radiographic, ultrasonic, dye penetrant.

• Corrosion Testing: Pitting and crevice corrosion tests.

• PMI (Positive Material Identification): Confirms alloy grade.

• Hydrostatic Testing: Ensures leak-proof performance.

Additional Information:

• Production Capacity: IN TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

Introduction

Hastelloy pipe fittings are premium-grade components made from the nickel-molybdenum-chromium superalloy family, specifically designed for use in the harshest industrial environments. These fittings are engineered to provide superior corrosion resistance, exceptional strength, and long-term reliability in chemical processing, power generation, pharmaceuticals, petrochemicals, and marine industries.

Unlike stainless steel or duplex fittings, Hastelloy pipe fittings excel in handling strong oxidizers, reducing agents, chlorides, and high-temperature conditions, where ordinary alloys often corrode, pit, or crack.

Types of Hastelloy pipe fittings include:

• Butt-weld fittings: elbows, tees, reducers, stub ends, caps.

• Forged fittings: couplings, unions, bushings, nipples, plugs.

• Compression fittings: ferrule connectors, adapters, tube fittings.

• Customized fittings for aggressive service conditions.

 Mechanical & Physical Properties Testing & Inspection

• Mechanical Tests: Tensile, hardness, elongation.

• Corrosion Testing: Pitting, crevice, salt fog tests.

• Non-Destructive Testing: Ultrasonic, radiographic, dye penetrant.

• Positive Material Identification (PMI): Confirms correct alloy grade.

• Hydro Testing: Leak-proof performance under pressure.

Additional Information:

• Production Capacity: IN TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

 Introduction

Hastelloy butt-weld fittings are premium piping components manufactured from the nickel-molybdenum-chromium superalloy family known as Hastelloy. These fittings are essential in industries that operate in extremely corrosive, high-pressure, and high-temperature environments.

Unlike stainless steel or duplex fittings, Hastelloy butt-weld fittings excel in both oxidizing and reducing conditions, offering superior resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC). They are extensively used in chemical processing, petrochemicals, pharmaceuticals, marine, and power generation industries, where material failure can cause significant downtime and safety risks.

Butt-weld fittings are specifically designed to be welded directly onto pipes, ensuring:

• Leak-proof connections

• High mechanical strength

• Smooth flow inside pipelines

• Long service life in harsh environments

Chemical Composition Hastelloy C276

• Nickel: Balance (~57%)

• Molybdenum: 15–17%

• Chromium: 14.5–16.5%

• Iron: 4–7%

• Tungsten: 3–4.5%

• Cobalt: ≤ 2.5%

Hastelloy C22

• Nickel: Balance (~56%)

• Chromium: 20–22.5%

• Molybdenum: 12.5–14.5%

• Iron: 2–6%

• Tungsten: 2.5–3.5%

Hastelloy B2

• Nickel: Balance

• Molybdenum: 26–30%

• Iron: ≤ 2%

• Carbon: ≤ 0.01%

 Mechanical Properties Testing & Inspection

• Mechanical Tests: Tensile, hardness, and elongation.

• Non-Destructive Tests: Radiographic, ultrasonic, and dye penetrant.

• Corrosion Testing: Pitting, crevice, and salt spray tests.

• PMI (Positive Material Identification): Ensures correct alloy grade.

• Hydrostatic Testing: Confirms leak-tight performance.

Additional Information:

• Production Capacity: 50 TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

 Introduction

A Hastelloy Forged Tee is a critical pipe fitting designed to distribute or combine fluid flow within piping systems. Unlike welded tees, forged tees are manufactured from solid Hastelloy bars or billets through forging, ensuring superior strength, uniformity, and resistance to stress and corrosion.

Hastelloy, a nickel-molybdenum-chromium alloy, is renowned for its exceptional resistance to corrosion, pitting, crevice corrosion, and stress corrosion cracking. When used to manufacture forged tees, it provides leak-proof, long-lasting, and durable joints in industries where aggressive chemicals, seawater, and high temperatures are common.

Chemical Composition (C276 as Example)

 

• Nickel (Ni): Balance (~57%)

• Molybdenum (Mo): 15–17%

• Chromium (Cr): 14.5–16.5%

• Iron (Fe): 4–7%

• Tungsten (W): 3–4.5%

• Cobalt (Co): ≤ 2.5%

• Carbon (C): ≤ 0.01%

Mechanical Properties of Hastelloy Forged Tee (Typical) Manufacturing Process of Hastelloy Forged Tees

1. Raw Material Selection – Hastelloy billets are chosen.

2. Cutting – Billets cut to required size.

3. Forging – High-pressure hammers/presses shape billets into T-forms.

4. Heat Treatment (Solution Annealing) – Improves ductility and corrosion resistance.

5. Machining – CNC machining for dimensional accuracy.

6. Surface Treatment – Pickling, passivation, and polishing.

7. Inspection & Testing – PMI, ultrasonic, radiography, hydro tests.

Testing & Quality Control

• Visual Inspection.

• Hydrostatic Testing.

• Ultrasonic Testing.

• Radiographic Examination.

• PMI (Positive Material Identification).

• Corrosion Resistance Testing.

 Welding & Fabrication Guidelines

• Welding Method: GTAW (TIG) preferred.

• Filler Metals: Matching Hastelloy filler wires.

• Preheating: Not required.

• Post-weld Heat Treatment: Recommended for corrosion resistance.

Additional Information:

• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

 Introduction

Hastelloy flanges are high-performance pipe connection components made from nickel-molybdenum-chromium alloys belonging to the Hastelloy family. Known for their exceptional resistance to aggressive chemicals, seawater, and oxidizing/reducing agents, these flanges are widely used in chemical processing, oil & gas, marine, power generation, nuclear, and aerospace industries.

 

Flanges act as critical connecting elements in pipelines, valves, and equipment, providing easy assembly, disassembly, and leak-proof joints. When manufactured in Hastelloy grades like C276, C22, B2, B3, and X, they deliver outstanding performance in corrosive and high-temperature environments where stainless steels and duplex alloys fail.

Chemical Composition (C276 Example)

 

• Nickel (Ni): Balance (~57%)

• Molybdenum (Mo): 15–17%

• Chromium (Cr): 14.5–16.5%

• Iron (Fe): 4–7%

• Tungsten (W): 3–4.5%

• Cobalt (Co): ≤ 2.5%

• Carbon (C): ≤ 0.01%

 Mechanical Properties (Typical) Testing & Quality Control

• Dimensional Inspection

• Hydrostatic Testing

• Ultrasonic Testing

• Radiography

• Positive Material Identification (PMI)

• Corrosion Resistance Testing

Additional Information:

• Production Capacity: AS PER ORDER
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

Introduction

In modern industries where chemical processing, oil and gas exploration, power generation, and marine engineering play pivotal roles, the demand for robust, corrosion-resistant, and reliable pipeline components has never been greater. Among the many crucial fittings used to connect and regulate pipelines, reducing flanges stand out as a versatile solution that allows the connection of pipes of varying diameters.

When manufactured from Hastelloy, a family of nickel–molybdenum–iron–chromium alloys renowned for their superior resistance to aggressive chemical environments, reducing flanges offer exceptional durability, mechanical integrity, and resistance to localized corrosion. This makes them a critical component in industries where conventional stainless steel or carbon steel fittings would quickly fail.

In modern industries where chemical processing, oil and gas exploration, power generation, and marine engineering play pivotal roles, the demand for robust, corrosion-resistant, and reliable pipeline components has never been greater. Among the many crucial fittings used to connect and regulate pipelines, reducing flanges stand out as a versatile solution that allows the connection of pipes of varying diameters.

When manufactured from Hastelloy, a family of nickel–molybdenum–iron–chromium alloys renowned for their superior resistance to aggressive chemical environments, reducing flanges offer exceptional durability, mechanical integrity, and resistance to localized corrosion. This makes them a critical component in industries where conventional stainless steel or carbon steel fittings would quickly fail.

Mechanical Properties (typical for C276)

• Tensile Strength: ~ 100 ksi (690 MPa).

• Yield Strength (0.2% offset): ~ 45 ksi (310 MPa).

• Elongation: ~ 40%.

• Hardness: ~ Rockwell B90.

 International Standards

• ASME/ANSI B16.5: Pipe flanges (½” to 24”).

• ASME B16.47: Large-diameter flanges (26” to 60”).

• MSS-SP-44: Pipeline flanges.

• DIN/EN standards: European flange specifications.

• BS 4504: British standard.

Size Range

• Nominal Pipe Sizes: ½” to 48” (DN15 to DN1200).

• Pressure Ratings: Class 150 to 2500 (PN2.5 to PN400).

Inspection & Maintenance

• Visual Inspection: Look for surface cracks, corrosion, or leaks.

• Non-Destructive Testing: Ultrasonic, magnetic particle, radiography.

• Hydrostatic Testing: Pressure test to check leakage.

• Bolt Tightening: Regular torque checks to maintain sealing.

• Cleaning: Prevent contamination buildup.

 

Additional Information:

• Production Capacity: IN TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

 Introduction

In industrial systems that deal with corrosive chemicals, extreme temperatures, and high-pressure operations, the importance of reliable piping components cannot be overstated. Among these, flanges are essential for connecting pipes, valves, and equipment securely. One specialized category is the screwed flange, which connects through threaded fastening rather than welding.

When made from Hastelloy C276 (UNS N10276), these flanges deliver exceptional corrosion resistance, strength, and durability in aggressive chemical environments. Hastelloy C276 Screwed Flanges are widely used in industries such as chemical processing, pharmaceuticals, power generation, marine, oil & gas, and pollution control equipment.

Chemical Composition (Typical for Hastelloy C276)

 

 Physical Properties

• Density: 8.9 g/cm³

• Melting Range: 1325–1370 °C

• Thermal Conductivity: 10.1 W/m·K

• Electrical Resistivity: 1.29 μΩ·m

• Magnetism: Non-magnetic

Mechanical Properties (at room temperature)

• Tensile Strength: 790 MPa

• Yield Strength (0.2% offset): 355 MPa

• Elongation: 40–45%

• Hardness: ~90 HRB

• Impact Strength: Excellent, even at cryogenic temperatures

Testing and Quality Assurance

Before dispatch, Hastelloy C276 screwed flanges undergo:

• Hydrostatic pressure testing

• Non-destructive testing (NDT)

• Hardness and tensile testing

• Corrosion testing (ASTM G28)

• Dimensional accuracy inspection

• Thread gauge inspection

Additional Information:

• Production Capacity: IN TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes

Introduction

Hastelloy X fittings are specialized piping components manufactured from Hastelloy X (UNS N06002), a nickel-chromium-iron-molybdenum alloy renowned for its high-temperature strength and oxidation resistance. Unlike stainless steel or standard nickel alloys, Hastelloy X excels in oxidizing, carburizing, and reducing environments, especially in applications requiring structural stability above 1000°C (1832°F).

Hastelloy X pipe fittings are essential in aerospace, gas turbines, nuclear reactors, petrochemicals, and furnace equipment where both corrosion resistance and high-temperature mechanical strength are mandatory.

Common types of Hastelloy X fittings include:

• Butt-weld fittings – elbows, tees, reducers, stub ends, caps.

• Forged fittings – couplings, unions, plugs, bushings.

• Custom fittings – for specialized high-temperature applications.

 Chemical Composition of Hastelloy X Mechanical Properties of Hastelloy X . Physical Properties

• Thermal Conductivity: 9.1 W/m·K (at 25°C)

• Electrical Resistivity: 1.3 µΩ·m

• Specific Heat: 440 J/kg·K

• Coefficient of Expansion: 13.4 µm/m·K (20–100°C)

These properties make Hastelloy X fittings suitable for thermal cycling and high-temperature furnace systems.

Testing & Quality Control

 

• Mechanical Testing: Tensile, hardness, elongation.

• NDT Testing: Ultrasonic, radiography, dye penetrant.

• PMI Testing: Confirms UNS N06002 material.

• Corrosion Testing: Oxidation/cycling at elevated temps.

• Hydro Testing: Leak and pressure performance check.

Additional Information:

• Production Capacity: IN TONS
• Delivery Time: READY STOCK
• Packaging Details: The packaging of the product is done using an effective method of packaging. It all includes- • Shrink-wrapping • Bubble wrapping • Carton boxes • Wooden crates/pallets/boxes