Alloy C276 Seamless Tubes

Q: What makes C276 different from other Alloy grades?

Alloy C276 stands out for its higher molybdenum and tungsten content and lower chromium, offering superior resistance to both oxidizing and reducing environments. It excels against pitting, crevice corrosion, and strong acids, making it ideal for aggressive chemical conditions. While C22 performs better in certain oxidizing environments, C276 offers broader corrosion resistance and strong high-temperature performance. Its reliability makes it a preferred choice for chemical processing, marine, and pollution control applications.

Q: What is C276 tube made of?

Alloy C276 tubes (UNS N10276) are nickel-based alloys primarily composed of nickel, molybdenum, and chromium, with small additions of tungsten, iron, and other elements. This composition offers outstanding resistance to both reducing and oxidizing environments. The alloy’s low carbon content also allows safe use in welded conditions without requiring post-weld heat treatment.

Q: What is C276 material equivalent to?

C276, also known as Alloy C-276, is a nickel-based corrosion-resistant alloy designated as UNS N10276 and WNR 2.4819. It conforms to several standards, including ASTM B574, B575, B619, B622, and ASME SB-575. Equivalent international grades include EN NiMo16Cr15W, JIS NW 0276, and GOST ХН65МВУ. Common trade names include Alloy C276, Inconel 276, Nickelvac HC-276, and Nicrofer 5716.

Q: What is the difference between Alloy C276 and 316?

Alloy C276 provides exceptional corrosion and heat resistance, along with higher tensile strength and durability, making it suitable for extreme environments. It performs well in aggressive chemical and marine conditions where resistance to oxidizing and reducing agents is essential. In contrast, 316 stainless steel is more affordable and widely used for general industrial, food processing, and medical applications where corrosion exposure is moderate.

Q: How to weld Alloy C276 tube?

To weld Alloy C276 tubes, use TIG welding with filler metals like ERNiCrMo-4 or ENiCrMo-3, maintaining clean surfaces and proper gas purging. Control heat input carefully, use correct amperage and voltage, and ensure smooth root, fill, and cap passes. Clean the joint thoroughly, avoid contamination, and taper off the arc slowly to prevent crater cracking.

Alloy C276 seamless tube is a high-strength, corrosion-resistant tube designed to perform reliably in aggressive chemical and high-temperature environments. Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd., based in Chon Buri, produces premium C276 alloy tubes meeting international quality standards. Our Alloy seamless tubes are available in various sizes, shapes, and coatings to suit diverse industrial needs. Whether for chemical processing, marine, or power industries, we offer dependable tubing solutions with fast delivery and custom options to match your specific project requirements.

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About Alloy C276 Seamless Tubes

Alloy C276 Seamless Tubes (UNS N10276 / DIN 2.4819) are nickel-molybdenum-chromium alloy tubes designed to withstand extreme conditions in demanding industrial applications. This alloy is known for its excellent resistance to corrosion, high tensile strength and durability in harsh environments. With a density of 8.89 g/cm³ and a melting point of 1390°C, it offers impressive thermal conductivity. The mechanical properties include a tensile strength of 930 MPa, yield strength of 240 MPa and elongation of 40%. Available in a wide dimensional range, common sizes include 1/2 inch, 1 inch and 2 inches, with wall thicknesses and schedules like SCH 10 and SCH 40. Surface finishes are available in bare, pickled and polished. C276 alloy seamless tubes are precision-engineered to meet industrial specifications.

Benefits of Alloy C276 Seamless Tubes in Industrial Use

Alloy C276 seam tubes are known for their superior temperature resistance, ease of fabrication, and adaptability to harsh chemicals.

Performs efficiently across a wide temperature range, making it suitable for both cryogenic and high-heat industrial applications.

These tubes provide excellent structural integrity, enabling the tubing to withstand high pressure and mechanical stress without deformation.

Designed to handle aggressive chemical environments, making it ideal for processes involving strong acids and corrosive agents.

Alloy C276 seamless tubing requires low upkeep due to its design, helping reduce downtime and long-term maintenance costs.

Supports seamless welding and forming processes, ensuring flexibility and efficiency during custom fabrication.

These tubes deliver long service life and reduced replacement frequency, translating to significant cost savings over time.

Why Choose Our for Alloy C276 Seamless Tubes?

We prioritize quality and customer satisfaction, making our alloy C276 seamless tubes a preferred choice. At Thaida, We ensure 100% fulfilment of commitments, provide flexible stock options to meet urgent needs and offer secure packaging—especially for international shipments to guarantee safe delivery every time.

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Alloy C276 Seamless Tubes Specifications

The manufacturing of Alloy C276 seamless tube follows a five-step process, ensuring compliance with industry standards.

Standard	ASTM B622 / ASME SB622
Nominal Size	1/8" to 12" (or custom on request)
Wall Thickness	Sch 5S, 10S, 40S, 80S or as required
Manufacturing Method	Seamless
Length	Single Random, Double Random, or Cut Length

Equivalent Properties of Alloy C276 Seamless Tubes

Alloy C276 Seamless tube equivalent table includes international material codes, DIN numbers, and comparable global grades.

Grade	UNS	WERKSTOFF NR.	AFNOR	EN	JIS	BS	GOST
Alloy C276	N10276	2.4819	-	NiMo16Cr15W	NW 0276	-	ХН65МВУ

Alloy C276 Seamless Tubes Chemical Composition

The chemical composition table for Alloy C276 Seamless tube includes elemental percentages focusing on chromium, nickel, and carbon.

Grade	Ni	Mo	Cr	Fe	W	Co	Mn	C	Si	P	S	V
Alloy C276	Balance	15.0 – 17.0	14.5 – 16.5	4.0 – 7.0	3.0 – 4.5	2.5 max	1.0 max	0.01 max	0.08 max	0.04 max	0.03 max	0.35 max

Alloy C276 Seamless Tubes Mechanical Properties

The mechanical properties table for Alloy C276 seamless tube covers tensile strength, yield strength, elongation, and other metrics below.

Property	Tensile Strength	Yield Strength (0.2% Proof)	Elongation	Hardness (Rockwell B)	Density	Melting Point
Value	690 MPa (100 ksi)	283 MPa (41 ksi)	40%	≤ 100 HRB	8.89 g/cm³	1325 – 1370 °C

Alloy C276 Seamless Tubes Manufacturing Process

The following are the 5 steps involved in the Alloy C276 seamless tube manufacturing process to achieve high-quality output.

1. Raw Material Selection
High-quality alloy billets and strips are carefully selected for superior strength and corrosion resistance.

2. Tube Formation

The selected raw material is formed into tubes using seamless extrusion methods, depending on the application.

3. Heat Treatment

Tubes undergo required controlled heat treatment to enhance mechanical properties and relieve internal stresses.

4. Cold Working and Finishing

After heat treatment, tubes are cold-worked for better surface finish, dimensional accuracy and improved strength.

5. Quality Control and Testing
Every tube is thoroughly inspected and tested to ensure it meets international quality standards for performance and reliability.

Applications of Alloy C276 Seamless Tubes

Alloy C276 Seamless Tubes serve as an essential component in industries requiring top-tier materials for demanding environments. Their durability and adaptability make them ideal for operations. Widely used across diverse processes, these tubes maintain performance under extreme conditions. Below are some key applications of these tubes.

Chemical and Petrochemical Industry

Oil and Gas Industry

Pharmaceutical & Biotechnology

Power Generation & Heat Exchange

Marine & Shipbuilding

Automotive & Aerospace Industry

Water Treatment & Plumbing

Construction & Infrastructure

Aerospace & Defense

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FAQ

What are the main advantages of Alloy C276 Seamless Tubes?

Alloy C276 seamless tubes offer exceptional corrosion resistance, high strength, and reliable performance in high-temperature and harsh environments. its seamless design ensures superior resistance to pitting, crevice corrosion, and stress corrosion cracking. With excellent durability and versatility, they are ideal for demanding applications in the chemical processing, oil and gas, and power generation industries.

What makes C276 different from other Alloy grades?

Alloy C-276 stands out for its higher molybdenum and tungsten content and lower chromium, offering superior resistance to both oxidizing and reducing environments. It excels against pitting, crevice corrosion, and strong acids, making it ideal for aggressive chemical conditions. While C-22 performs better in certain oxidizing environments, C-276 offers broader corrosion resistance and strong high-temperature performance. Its reliability makes it a preferred choice for chemical processing, marine, and pollution control applications.

What makes Alloy C276 superior to other nickel alloys?

Alloy C276 stands out for its exceptional corrosion resistance, high tensile and temperature strength, and excellent fabricability. Its high molybdenum content ensures superior resistance to acids and chlorides, even in harsh environments up to 1350°C. The alloy’s combination of strength, ductility, and long-term durability makes it a cost-effective and reliable choice for demanding industrial applications.

What is c276 tube made of?

Alloy C-276 tubes (UNS N10276) are nickel-based alloys primarily composed of nickel, molybdenum, and chromium, with small additions of tungsten, iron, and other elements. This composition offers outstanding resistance to both reducing and oxidizing environments. The alloy’s low carbon content also allows safe use in welded conditions without requiring post-weld heat treatment.

What is c276 material equivalent to?

The C276 is also known as Alloy C-276, is a nickel-based corrosion-resistant alloy designated as UNS N10276 and WNR 2.4819. It conforms to several standards, including ASTM B574, B575, B619, B622, and ASME SB-575. Equivalent international grades include EN NiMo16Cr15W, JIS NW 0276, and GOST ХН65МВУ. Common trade names include Alloy C276, Inconel 276, Nickelvac HC-276, and Nicrofer 5716.

What is the difference between alloy c276 and 316?

Alloy C-276 provides exceptional corrosion and heat resistance, along with higher tensile strength and durability, making it suitable for extreme environments. It performs well in aggressive chemical and marine conditions where resistance to oxidizing and reducing agents is essential. In contrast, 316 stainless steel is more affordable and widely used for general industrial, food processing, and medical applications where the corrosion exposure is moderate.

How to weld alloy c276 tube?

To weld Alloy C-276 tubes, use TIG welding with filler metals like ERNiCrMo-4 or ENiCrMo-3, maintaining clean surfaces and proper gas purging. Control heat input carefully, use correct amperage and voltage, and ensure smooth root, fill, and cap passes. Clean the joint thoroughly, avoid contamination, and taper off the arc slowly to prevent crater cracking.