ASTM B622 Hastelloy C276 Seamless Pipe
Product Name:ASTM B622 Hastelloy C276 Seamless Pipe
Standard:ASTM B622 / ASME SB622
Pipe Type:Seamless Pipe / Seamless Tube
Manufacturing Process:Hot Finished / Cold Drawn
Heat Treatment:Solution Annealed
Surface Condition:Pickled, Descaled, Bright Annealed
End Type:Plain End, Beveled End, Customized
Outside Diameter:6.35 mm – 88.9 mm
Wall Thickness:0.5 mm – 10 mm
Pipe Schedule:SCH 5S, SCH 10S, SCH 40S, SCH 80S, Customized
Length:3000 mm, 6000 mm, Custom Length
Send E-mail:info@gneestainless.com
Tel:+8615824687445
Description
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of ASTM B622 Hastelloy C276 Seamless Pipe in China. With abundant experience, we warmly welcome you to wholesale customized ASTM B622 Hastelloy C276 Seamless Pipe from our factory. For price consultation, contact us.
What is ASTM B622?
ASTM B622 is a standard specification established by ASTM International covering seamless pipe and tube made from various nickel and nickel-cobalt alloys; it encompasses more than 30 high-performance nickel and nickel-cobalt alloys and specifies chemical composition, mechanical properties (tensile strength, yield strength, and elongation), heat treatment, dimensional specifications, and inspection and testing methods.
ASTM B622 Hastelloy C276 Seamless Pipe Supplier
As a professional supplier of alloy piping, Gnee offers ASTM B622 UNS N10276 seamless pipes with outer diameters ranging from 1/4″ NB to 6″ NB and wall thicknesses from Sch 10 to Sch 160. Length options include single random (5–7 m), double random (9–13 m), and cut-to-length; delivery conditions cover hot-rolled, cold-rolled, solution-annealed, and descaled states, with surface finishes available in electropolished, mechanically polished, or passivated options.
The ASTM B622 Hastelloy C276 seamless pipes we supply exhibit exceptionally low rates of pitting and crevice corrosion in both oxidizing and reducing media. Their resistance to uniform corrosion-particularly in 98% hot phosphoric acid, concentrated hydrochloric acid, and chloride-ion-containing environments-far surpasses that of 316L stainless steel (with corrosion rates as low as 0.01 mm/year). Furthermore, the low-carbon design (C ≤ 0.010%) effectively inhibits grain-boundary carbide precipitation in the heat-affected zone, allowing the material to retain corrosion resistance equivalent to the base metal after welding without the need for post-weld solution treatment. With a maximum operating temperature of approximately 400°C (750°F), these pipes meet the requirements of the vast majority of chemical processing and oil & gas applications.
Chemical Composition (wt%)
| Element | Ni | Mo | Cr | Fe | W | Co | C | Mn | Si | V | P | S |
| Min | Bal. | 15.0 | 14.5 | 4.0 | 3.0 | - | - | - | - | - | - | - |
| Max | - | 17.0 | 16.5 | 7.0 | 4.5 | 2.5 | 0.010 | 1.0 | 0.08 | 0.35 | 0.04 | 0.03 |
Mechanical Properties (Annealed, per ASTM B622)
| Property | Value |
| Tensile Strength | ≥ 115 ksi (790 MPa) |
| Yield Strength (0.2% offset) | ≥ 52 ksi (355 MPa) |
| Elongation (2 in gauge) | ≥ 40% |
| Reduction of Area | ≥ 50% |
| Hardness | ≤ 100 HRB (typ. ~83 HRB) |
Physical Properties (Solution-Annealed)
| Property | Metric |
| Density | 8.89 g/cm³ |
| Melting Range | 1325 – 1370 °C |
| Specific Heat (70 °F) | 427 J/kg·K |
| Thermal Conductivity (70 °F) | 9.8 W/m·K |
| Thermal Conductivity (212 °F) | 11.0 W/m·K |
| CTE (70–212 °F) | 11.2 × 10⁻⁶ m/m·K |
| CTE (70–1000 °F) | 13.4 × 10⁻⁶ m/m·K |
| Modulus of Elasticity | 205 GPa |
| Modulus of Rigidity | 79 GPa |
| Electrical Resistivity (75 °F) | 130 µΩ·cm |
| Magnetic Permeability | < 1.002 |
Recommended Heat Treatment
| Step | Temperature | Hold Time | Cooling |
| Solution Anneal | 1922 – 2012 °F (1050 – 1100 °C) | 1 hr per 1 in (min 30 min) | Water quench or forced air cool |
| Pickle / Descale | - | - | HCl–HNO₃ or citric acid, then rinse |
Hastelloy C276 Seamless Pipe Applications
| Industry | Service |
| Chemical Processing | Reactors, heat exchangers, evaporators, piping |
| Pulp & Paper | Bleach digesters, chlorine dioxide generators |
| Oil & Gas | Sour gas wells, subsea equipment |
| Waste Treatment | Incinerator scrubbers, flue gas desulfurization (FGD) |
| Pharmaceutical | Reactor vessels, piping, valves |
ASTM B622 Hastelloy C276 Seamless pipe Price
The price of ASTM B622 Hastelloy C276 seamless pipe typically ranges from $12.52 to $100.00 per kilogram (or approximately $5,000 to $6,000+ per ton FOB), depending on the specific dimensions, wall thickness, and order volume.
To provide a more accurate quotation, please supply the following information:
Required pipe size, nominal bore (NB), and wall thickness schedule (e.g., SCH 40, SCH 80);
Required total quantity or total length;
And your desired delivery location or port (to estimate shipping costs).
Quality Inspection
Each batch undergoes hydrostatic testing, eddy current testing, hardness testing, and grain size inspection; NACE MR0175 certification for sour service is available as an option, and EN 10204 3.1 material certificates are provided. Additionally, Gnee offers value-added services such as pipe expansion, machining, sandblasting, heat treatment, and crating or palletizing, while supporting global logistics and ensuring full-chain quality traceability from raw material to finished product.
Standard export packaging
ASTM B622 Hastelloy C276 Seamless Pipes are packed according to international export standards to ensure surface protection and safe transportation. Pipes are usually bundled with steel straps, wrapped with waterproof PE film, and protected with plastic caps on both ends. For precision sizes or small-diameter tubes, reinforced plywood cases are used to prevent deformation and scratches. Each package is marked with UNS N10276 grade, ASTM B622 standard, size, heat number, quantity, and MTC information for full traceability during shipment.
FAQ
Q:What is the difference between ASTM B622 seamless pipe and ASTM B626 welded pipe?
ASTM B622 (Seamless): Features no weld seams; manufactured by piercing a billet followed by cold drawing or cold rolling. The microstructure is continuous and uniform, with no risk of weld dilution or segregation. It offers superior pressure-bearing capacity and is recommended for extreme operating conditions involving ultra-high pressures, highly hazardous strong acids (such as concentrated sulfuric acid or wet chlorine gas), and applications where leakage is strictly prohibited.
ASTM B626 (Welded): Fabricated by rolling and welding plates or strips. It offers relatively lower costs and is suitable for large-diameter piping (e.g., NPS 8" and above) as well as low-to-medium pressure transport pipelines.
Q: What is the maximum service temperature for C276 seamless pipe?
The upper limit for continuous service is approximately 750°F (400°C). Exceeding this temperature may cause the alloy to precipitate harmful secondary phases (such as the μ-phase), resulting in reduced corrosion resistance. If operating conditions involve higher temperatures, consultation with a metallurgical engineer is required.
Q: How does C276 outperform 316L stainless steel?
C276 has a PREN of approximately 67 (compared to only ~25 for 316L), a CPT (Critical Pitting Temperature) > 150°C (vs. ~30°C for 316L), and a CCT (Critical Crevice Temperature) of approximately 55°C (vs. < 10°C for 316L). In environments containing hydrochloric acid, sulfuric acid, or chloride ions, the corrosion rate of C276 can be as low as 0.01 mm/year, whereas that of 316L often exceeds 1.0 mm/year.
Q: What welding methods are used for C276? Is post-weld heat treatment required?
GTAW (TIG) or a combination of GTAW and GMAW is recommended, using matching filler metal (ERNiCrMo-3 / C276 welding wire). Due to the low carbon content (C ≤ 0.010%), post-weld solution annealing is not required, and the corrosion resistance of the base metal remains intact within the heat-affected zone.
Hot Tags: ASTM B622 Hastelloy C276 Seamless Pipe, China ASTM B622 Hastelloy C276 Seamless Pipe manufacturers, factory, 713 Nickel Metal Plate, Steel Round Tube Nickel Pipe, Alloy Manufacture Medical Devices, Haynes 747 Ni Gh3030 Alloy Pipe Tubes, Supply Hastelloy B2 Nickel Bar, Forged Nickel Copper Alloy Rods
Send Inquiry
You Might Also Like
