ASTM B622 Hastelloy C22 high nickel alloy steel pipe
ASTM B622 Hastelloy C22 high nickel alloy steel pipe
ASTM B622 Hastelloy C22 is a high-nickel alloy steel pipe known for its excellent resistance to corrosion from both oxidizing and non-oxidizing chemicals, as well as pitting, crevice corrosion, and stress corrosion cracking. Its high chromium and molybdenum/tungsten content makes it a versatile material suitable for harsh chemical environments, such as those found in the chemical process industry. Key properties include its composition, high ductility, and weldability, as well as special requirements such as solution annealing and descaling upon delivery.
What is the difference between HC 276 and HC 22?
Hastelloy C276 and C22 are both high-performance nickel-chromium-molybdenum alloys, but their different compositions lead to different properties. Hastelloy C276 has a higher nickel content and a lower chromium content than Hastelloy C22.
ASTM B622 UNS N10276 Pipe Specification
| Standard Specification | ASTM B622 UNS N10276, ASME SB 622 UNS N10276 / ASTM B619 ASME SB 619 |
| Manufacturing Type | Seamless / ERW / Welded / Fabricated / CDW / CDS / DOM / CEW / 100% X Ray Welded |
| Thickness Range | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXH, SCH XXS, SCH XS |
| Standard | SUS, JIS, AISI, ASTM, GB, DIN, EN |
| Value Added Services |
Cutting Beveling Threading Destructive and Non Destructive Ultrasonic Testing Draw & Expansion as per required Size & Length |
| Origin of Hastelloy pipe material | Indian, European, Korean, Japanese |
| ASME SB 622 UNS N10276 Hastelloy Pipe End Types |
BE : Beveled end BBE : Bevel both ends BLE : Bevel large end BSE : Bevel small end TOE / POE = Treaded One End / Plain One End TOE / BOE = Treaded One End / Beveled One End POE / BOE = Plain One End / Beveled One End TBE = Treaded Both Ends PBE = Plain Both Ends |
| Marking of Hastelloy C276 Pipe manufacturers |
Specification Material Grade Nominal Size Schedule or Wall Thickness Method of Manufacturing (Seamless / Welded / ERW) Heat Number Supplier or Manufacturer's Name or Custom Logo - on request Marked Pipe Sample: ASTM B622 UNS N10276 12" NB SCH 40S SEAMLESS HEAT NO. XXXX |
Hastelloy C22 pipe Mechanical Properties
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Hastelloy C22 | 8.69 g/cm3 | 1399 °C (2550 °F) | Psi – 1,00,000 , MPa – 690 | Psi – 45000 , MPa – 310 | 45 % |
ASTM B622 UNS N06022 Pipe Chemical Composition
| Grade | C | Mn | Si | S | Co | Ni | Cr | Fe | Mo | P |
| C22 | 0.010 max | 0.50 max | 0.08 max | 0.02 max | 2.50 max | 50.015 min* | 20.00 – 22.50 | 2.00 – 6.00 | 12.50 – 14.50 | 0.02 max |
Standards and Material Specifications
Standards: The standard specification for these pipes is ASTM B622, which covers seamless nickel and nickel-cobalt alloy pipe.
Condition: Pipes should be supplied in the solution annealed and descaled condition unless a controlled atmosphere process is used during the heat treatment.
Dimensions: While the standard includes a table of optional dimensions, other dimensions are possible and are typically custom-made in accordance with ASME B36.10 and ASME B36.19.
Dimensional Tolerances: Dimensional tolerances are specified in ASTM B829.
Key Features
Composition: Austenitic nickel-chromium-molybdenum-tungsten alloy, UNS Number: N06022.
Corrosion Resistance: Excellent corrosion resistance to both oxidizing and non-oxidizing media, especially in chloride-containing environments. It also resists oxidizing acid chlorides, wet chlorine, and various acids.
Versatility: Performs well in both reducing and oxidizing environments, benefiting multi-purpose plants.
Mechanical Properties: High ductility and excellent weldability for ease of fabrication. It is solution-strengthened and can be further strengthened by cold working.
Heat Resistance: Maintains integrity at elevated temperatures and exhibits strong oxidation resistance.
Non-Heat-Treable: Cannot be strengthened by heat treatment, but can be strengthened by cold working.
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneemetal.com.
