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Seamless Hastelloy C276 Tube

Seamless Hastelloy C276 Tube is a high-performance, corrosion-resistant tube crafted from a single, solid billet of a nickel-molybdenum-chromium-tungsten superalloy. It is manufactured without a weld joint, ensuring superior structural integrity and reliability, especially under high-stress, high-temperature, and extremely corrosive conditions. The"Hastelloy C276"designation refers to a specific grade known for its outstanding resistance to a wide range of aggressive chemicals. This alloy is particularly noted for its ability to resist localized corrosion, such as pitting and crevice corrosion, and stress corrosion cracking. This makes it a top choice for applications in the most severe chemical processing and pollution control environments.
① STANDARD: ASTM B622 B619...
② OD RANGE : 6-257MM
③ THICKNESS RANGE: 1-35 MM

Seamless Hastelloy C276 Nickel Alloy Steel Tube

What Is a Seamless Hastelloy C276 Tube?
Seamless Hastelloy C276 tube is a high-performance, corrosion-resistant tube crafted from a single, solid billet of a nickel-molybdenum-chromium-tungsten superalloy. It is manufactured without a weld joint, ensuring superior structural integrity and reliability, especially under high-stress, high-temperature, and extremely corrosive conditions. The “Hastelloy C276"designation refers to a specific grade known for its outstanding resistance to a wide range of aggressive chemicals. This alloy is particularly noted for its ability to resist localized corrosion, such as pitting and crevice corrosion, and stress corrosion cracking. This makes it a top choice for applications in the most severe chemical processing and pollution control environments.
Key Features and Advantages
Seamless Hastelloy C276 tubes offer a unique combination of benefits that make them invaluable in the most demanding industries:
Universal Corrosion Resistance: Provides outstanding resistance to both oxidizing and reducing acids, as well as to a variety of corrosive media.
Exceptional Pitting and Crevice Corrosion Resistance: The high molybdenum content provides excellent resistance to localized corrosion in chloride-containing environments.
High Pressure and Temperature Tolerance: The seamless construction and robust material allow the tube to safely handle high internal pressures and extreme temperatures.
Superior Weldability: The alloy can be welded using standard methods without the risk of post-weld corrosion, a key advantage for complex fabrications.
Resistance to Stress-Corrosion Cracking: The high nickel content makes the alloy highly resistant to chloride-ion stress-corrosion cracking.
Product Specifications and Data
To provide a comprehensive overview of this high-performance material, here are the detailed technical specifications and performance data for Hastelloy C276.
Table 1: Chemical Composition of Hastelloy C276
The composition of Hastelloy C276 is carefully balanced to achieve its superior corrosion resistance and high strength.
Element Percentage (%)
Nickel (Ni) Balance
Molybdenum (Mo) 15.0 - 17.0
Chromium (Cr) 14.5 - 16.5
Iron (Fe) 4.0 - 7.0
Tungsten (W) 3.0 - 4.5
Carbon (C) 0.01
Vanadium (V) 0.35
Manganese (Mn) 1.0
Silicon (Si) 0.08
Cobalt (Co) 2.5
Table 2: Typical Mechanical Properties of Hastelloy C276
Hastelloy C276 is specifically designed to maintain its strength and shape in high-stress, corrosive environments.
Property Value (Annealed)
Tensile Strength 690 MPa
Yield Strength 283 MPa
Elongation 40%
Hardness 100 HRB
Table 3: Typical Physical Properties of Hastelloy C276
These physical properties highlight the material's ability to perform reliably under a wide range of conditions.
Property Value
Density 8.89 g/cm³
Melting Point 1371 °C approx.
Thermal Expansion 11.2 µm/m·°C (20-100°C)
Thermal Conductivity 10.2 W/m·K (20°C)
Modulus of Elasticity 205 GPa
Common Applications
The combination of high corrosion resistance and high strength of seamless Hastelloy C276 tubes makes them a preferred choice for:
Chemical Processing: Used in reactors, heat exchangers, and piping for handling a wide range of aggressive chemicals.
Pollution Control: In scrubbers and stack liners for flue-gas desulfurization (FGD) systems.
Pharmaceuticals: In the production of pharmaceutical goods where high purity and corrosion resistance are critical.
Waste Treatment: In equipment for processing hazardous and corrosive waste.

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