ASTM B622 UNS N10276 Hastelloy C276 Pipe & Tube
ASTM B622 UNS N10276 (Hastelloy C276) is a nickel-molybdenum-chromium alloy known for its exceptional corrosion resistance in the most aggressive chemical environments. Designed for use in strong oxidizing and reducing media, N10276 offers outstanding protection against pitting, crevice corrosion, and stress corrosion cracking. Pipes and tubes manufactured under ASTM B622 ensure excellent mechanical stability, weldability, and long-term performance in chemical processing, pollution control, and high-temperature systems.
Key Features
- Exceptional resistance to pitting and crevice corrosion
- Outstanding corrosion resistance in oxidizing and reducing environments
- Excellent stress corrosion cracking resistance
- High resistance to chloride-containing media
- Superior performance in mixed acid applications
- High-temperature and high-pressure capability
- Available in seamless pipe and tube form
- Excellent weldability and formability
Equivalent Grades
| Standard | Equivalent |
|---|---|
| UNS | N10276 |
| Trade Name | Hastelloy C276 |
| Werkstoff | 2.4819 |
| Standards | ASTM B619, B622, B626 |
| Other Equivalents | NiMoCr Corrosion-Resistant Alloys |
Available Sizes
- Pipe OD: 6 mm to 914.4 mm
- Tube OD: 3 mm to 600 mm
- Wall Thickness: 0.3 mm to 50 mm+
- Length: SRL / DRL / Custom up to 13.5 m
ASTM B622 UNS N10276 Chemical Composition
| Element | % |
|---|---|
| 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 |
| Cobalt (Co) | ≤ 2.5 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 0.08 |
| Carbon (C) | ≤ 0.01 |
| Phosphorus (P) | ≤ 0.04 |
| Sulfur (S) | ≤ 0.03 |
| Vanadium (V) | ≤ 0.35 |
UNS N10276 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 690 – 760 MPa |
| Yield Strength (0.2% Proof) | 280 – 300 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 90 HRB |
Hastelloy C276 Physical Properties
| Property | Value |
|---|---|
| Density | 8.89 g/cm³ |
| Melting Point | 1325 – 1370°C |
| Thermal Conductivity | 10 W/m·K |
| Electrical Resistivity | 1.21 µΩ·m |
| Specific Heat | 420 J/kg·K |
Type of ASTM B622 UNS N10276 Pipes
- Seamless Pipes
- Seamless Tubes
- Heat Exchanger Tubes
- Instrumentation Tubes
- Pressure Tubing
Application
- Chemical processing & refining
- Pollution control systems
- Pharmaceutical and food processing equipment
- Pulp & paper digesters and bleach plants
- Oil & gas sour service environments
- Marine and offshore corrosion systems
- Heat exchangers, reactors, and evaporators
- Waste treatment and acid recovery systems
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