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Hastelloy C22 Seamless Pipe

Hastelloy C22 |UNS N06022|2.4602 Seamless Pipe

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Hastelloy C22 Seamless Pipes (UNS N06022 / W.Nr. 2.4602) are versatile nickel-chromium-molybdenum-tungsten alloys engineered for superior resistance to pitting, crevice corrosion, and stress-corrosion cracking. As a premier manufacturer based in Fujian, China, Tengqi produces high-integrity seamless tubing that strictly complies with ASTM B622 and ASME SB622 international standards.

Compared to Alloy C276, Hastelloy C22 provides enhanced protection against oxidizing aqueous media, including wet chlorine and solutions containing nitric acid or oxidizing acids with chlorine ions. Our C22 seamless pipes are indispensable for pollution control, flue gas desulfurization (FGD), and pharmaceutical chemical processing. Through advanced cold-drawing and vacuum annealing, Tengqi ensures every pipe maintains tight dimensional tolerances and a high-integrity surface finish, delivering maximum durability for the most aggressive industrial environments.

SeamlessHastelloy C22 Pipe (HastelloyC22 / UNS N06022 / W.Nr. 2.4602) is a Ni-Cr-Mo alloy with superior resistance to pitting and crevice corrosion in mixed acid service. Manufactured by Tengqi in Fujian, China, every heat is fully traceable, hydro-tested and available with third-party inspection (SGS / BV / TUV) on request.

Product Specifications

  • ASTM B161 / B163 — Seamless Tube & Pipe
  • ASTM B165 / B167 — Seamless Pipe
  • ASTM B407 / B423 — Seamless Pipe & Tube
  • ASTM B622 — Seamless Pipe & Tube
  • ASTM B829 — General Requirements
  • Finishing: solution annealed, pickled & polished; bright annealed available on request

Size Range

Outside Diameter (OD)Wall ThicknessLength
6 mm – 1016 mm (1/4"– 40")0.5 mm – 65 mm6 m / 12 m, or as required

Chemical Composition

HastelloyC22 (UNS N06022) — Composition %

UNSCMnPSSiCrNiMoWCoFeV
N06022≤ 0.015≤ 0.50≤ 0.02≤ 0.02≤ 0.0820.0 – 22.5remainder12.5 – 14.52.5 – 3.5≤ 2.52.0 – 6.0≤ 0.35

Mechanical Properties

PropertyValue
Delivery ConditionSolution annealed, pickled & polished
Tensile Strength≥ 690 MPa
Yield Strength (0.2% offset)≥ 310 MPa
Elongation in 2 in. / 50 mm≥ 45%

Physical Properties

PropertyValue
Density8.69 g/cm3
Thermal Conductivity9.9 W/m·K
Specific Heat Capacity414 J/kg·K
Elastic Modulus205 GPa
Magnetic PropertiesPractically non-magnetic
PREN (Pitting Resistance Equivalent)≥ 65.0

Industry Applications

Hydrochloric & Acetic Acid Service
Sulfuric & Phosphoric Acid Service
Flue Gas Desulfurization
Chemical & Petrochemical Industry
Marine & Offshore Engineering
Pharmaceutical & Food Processing
Heat Exchangers & Boiler Tubes
Pressure Vessels & Reactors

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Lidun Industrial Park, Lidun Town, Zhouning County, Ningde City, Fujian Province,355400,China

+86-577-88877003
+86-577-88877015
+86-577-88877019

+86 13587686960

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Lidun Industrial Park, Lidun Town, Zhouning County, Ningde City, Fujian Province,355400,China

+86-577-88877003
+86-577-88877015
+86-577-88877019

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