ASME SB622 UNS N10276 Nickel Alloy Tube , Hastelloy C276 Heat Exchanger Tube
ASTM B622/ ASME SB622 C276 / UNS N10276 / DIN 2.4819 Seamless Nickel Alloy Tube
ASTM B622 defines the stringent requirements for manufacturing high-quality seamless tubes from the highly corrosion-resistant nickel alloy Hastelloy C276 (UNS N10276). It mandates specific chemistry, solution annealing heat treatment, mechanical properties, dimensional tolerances, mandatory hydrostatic or eddy current testing, and comprehensive certification. These tubes are critical components in demanding industries like chemical processing, oil & gas, pollution control, and pharmaceuticals where resistance to extreme corrosion and high integrity are paramount. Always ensure the material certification (e.g., EN 10204 3.1) and compliance with NACE MR0175/ISO 15156 (if required for sour service) are provided.
ASME SB622 Hastelloy C276 / UNS N10276 Nickel Alloy Tube Equivalent Grade
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | OR | GOST |
| Hastelloy C276 | N10276 | 2.4819 | - | NiMo16Cr15W | NW 0276 | ЭП760 | ХН65МВУ |
ASME SB622 Hastelloy C276 / UNS N10276 Nickel Alloy Tube Chemical Composition
| Hastelloy C276 | Ni | C | Mo | Mn | Si | Fe | P | S | Co | Cr |
| Balance | 0.010 max | 15.00 – 17.00 | 1.00 max | 0.08 max | 4.00 – 7.00 | 0.04 max | 0.03 max | 2.5 max | 14.50 – 16.50 |
ASME SB622 Hastelloy C276 / UNS N10276 Nickel Alloy Tube Mechanical Properties
| Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 8.89 g/cm3 | 1370 °C (2500 °F) | Psi – 52,000 , MPa – 355 | Psi – 1,15,000 , MPa – 790 | 40 % |
The Key Properties of C276 Nickel Alloy Seamless Tube
Corrosion Resistance:
- Exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking.
- Resistant to a wide range of corrosive environments, including acids (such as hydrochloric, sulfuric, and phosphoric acids).
Mechanical Properties:
- Tensile Strength: Typically around 70,000 psi (or more), depending on the specific treatment and processing.
- Yield Strength: Approximately 30,000 psi (or higher).
- Elongation: Generally around 30%, indicating good ductility.
High-Temperature Performance:
- Maintains mechanical integrity and resistance to oxidation and sulfidation at elevated temperatures.
Applications
1. Pollution control stack liners, ducts, dampers, scrubbers, stack-gas reheaters, fans and fan housings.
2. Flue gas desulfurization systems.
3. Chemical processing components like heat exchangers, reaction vessels, evaporators, and transfer piping.
4. Sour gas wells.
5. Pulp and paper production.
6. Waste treatment.
7. Pharmaceutical and food processing equipment.
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