Hastelloy C4 Pipe Supplier in China
Hastelloy C22 tubing is a high-performance,fully austenitic nickel-chromium-molybdenum-tungsten superalloy piping solution designed for exceptional corrosion resistance.This specialized tubing outperforms standard stainless steel and other nickel alloys in highly corrosive chemical environments.
Hastelloy C22 Equivalent Designations
- UNS N06022
- W.Nr. 2.4602
- EN NiCr21Mo14W
- AFNOR NC 20 FeMo
- AFNOR NU-30M
Hastelloy C22 Pipe Standards
- ASTM B622 / ASME SB622
- ASTM B619 / ASME SB619
- ASTM B626 / ASME SB626
- ASTM B564 / ASME SB564
- ASTM B575 / ASME SB575
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Chemical Composition of Hastelloy C22 Pipe, wt.%
| Elemento | Min | Max | Primary Role in the Alloy |
|---|---|---|---|
| Ni | Equilibrio | Provides the base matrix,high ductility,and excellent resistance to chloride-induced stress corrosion cracking. | |
| Cr | 20.0 | 22.5 | Delivers exceptional resistance to heavily oxidizing environments (e.g., nitric acid, wet chlorine, ferric salts). |
| Mes | 12.5 | 14.5 | Protects the metal from localized reducing environments, heavily suppressing pitting and crevice corrosion. |
| W | 2.5 | 3.5 | Works synergistically with Molybdenum to further optimize resistance to localized pitting attacks. |
| Fe | 2.0 | 6.0 | Included primarily as a stabilizing element and a byproduct of structural economy during primary melting. |
| Co | – | 2.5 | Enhances structural and thermal stability, while preventing rapid work-hardening during processing. |
| C | – | 0.015 | Kept ultra-low to completely prevent grain-boundary carbide precipitation during the welding process. |
| Minnesota | – | 0.50 | Acts as a deoxidizer and controls sulfur impurities during the initial manufacturing melt. |
| Si | – | 0.08 | Controlled strictly to low levels to maximize weld pool fluidity without degrading localized corrosion resistance. |
| S | – | 0.02 | Kept at minimal trace levels to guarantee hot workability and eliminate weld-cracking risks. |
| P | – | 0.02 | Maintained as an ultra-low impurity to secure structural cleanliness and prevent brittleness. |
| V | – | 0.35 | Added in trace amounts to control grain size growth during high-temperature thermodynamic treating. |
Mechanical Properties of Hastelloy C22 Pipe
Room Temperature Mechanical Properties
| Mechanical Property | Fuerza de Tensión | Fuerza de producción | Alargamiento | Dureza |
|---|---|---|---|---|
| Minimum Specification Limit | ≥ 690 MPa(100 ksi) | ≥ 310 MPa (45 ksi) | ≥ 45% | ≤ 100 HRB |
| Typical Range | 690 – 800 MPa(100 -116 ksi) | 310 – 450 MPa(45 – 65 ksi) | 45 – 60 % | 89 – 100 HRB |
High-Temperature Tensile Performance
When exposed to thermal loads inside chemical reactors or heat exchangers,the alloy undergoes gradual thermal softening.However,its high molybdenum and tungsten matrix keeps structural degradation low. Typical elevated-temperature values for solution-treated material include:
- At 316℃ (600℉):
Yield Strength: ~ 42 ksi (286 – 290 MPa)
Tensile Strength: ~ 98 ksi(676MPa)
Elongation: ~ 62% - At 538℃ (1000℉):
Yield Strength: ~ 34 ksi (234 – 276 MPa)
Tensile Strength: ~ 88 ksi(607 – 627 MPa)
Elongation: ~ 61 – 67%
Applications of Hastelloy C22 Pipe
- Hazardous Waste Water Treatment
- Chlorination and Bleach Systems
- Acetic Acid Production Plants
- Pharmaceutical Reaction Vessels & Piping
- Desulfuración de gases de combustión
- Agrochemical & Pesticide Manufacturing
- Desalination Plant Heat Exchangers
- Sour Gas Flare Lines
- Cellulosic Biofuel Processing
- Subsea Oil & Gas Flowlines
FAQs About Hastelloy C22 Pipe
Sí.Los tubos de Hastelloy C22 pueden soldarse a metales distintos como Tubos de acero inoxidable 316L,Acero inoxidable dúplex o acero al carbono.
- Metal de aportación: Debe utilizar un metal de aportación sobrealeado, normalmente alambre de aleación 622 (ERNiCrMo-10) o electrodos de EniCrMo-10.
- Precaución: Puede producirse corrosión galvánica en el lado de acero inoxidable menos noble si el fluido de proceso es altamente conductor y agresivo.
No.A diferencia de las aleaciones de níquel o aceros al carbono anteriores, los tubos de Hastelloy C22 están listos para el servicio inmediatamente después de la soldadura.Su contenido ultrabajo de carbono evita la formación de carburos intergranulares peligrosos durante la soldadura.La realización de un tratamiento térmico estándar de alivio de tensiones puede inducir en realidad la formación de compuestos intermetálicos frágiles (fases Sigma/Mu) y reducir la resistencia a la corrosión.Si es necesario un calentamiento estructural, debe realizarse un recocido de solución completa a 2050 °F, seguido de un enfriamiento rápido con agua.
- ASTM B622:Tubos sin soldadura.
- ASTM B619:Tubos soldados.
- ASTM B626:Tubo soldado.
- ASME SB-622/619/626: Normas para recipientes a presión.
- Ácido clorhídrico:
El C22 ofrece una excelente resistencia al HCl diluido a temperaturas moderadas; sin embargo, para el HCl en ebullición altamente concentrado, las aleaciones especializadas como el Hastelloy B3 ofrecen mejores resultados. - Ácido sulfúrico:
El C22 ofrece una excelente resistencia en una amplia gama de concentraciones a temperaturas de hasta 150℉.Es particularmente eficaz en corrientes de ácido sulfúrico contaminadas con impurezas oxidantes (como iones férricos u oxígeno disuelto),donde fallan otras aleaciones.
The high cost stems directly from its elemental composition and manufacturing complexity:
- Raw Materials:
It contains over 56% pure Nickel,along with high percentages of expensive Molybdenum,Chromium,and Tungsten. - Processing Costs:
The alloy work-hardens rapidly and has high hot-strength,making extrusion,drawing,rolling,and machining incredibly energy-intensive and abrasive to factory tooling.
Contacto
- RM901 No.22 Tangjiaqiao Road Wenzhou China
- +86 577 8551 1171
- [email protected]
- https://www.kaysuns.com/
