C22 Hastelloy® Alloy Pipe | Unparalleled Corrosion Resistance for Extreme Service Piping
✓ Hybrid Acid Resistance: Withstands 98% H₂SO₄ + 10% HCl at 80°C (176°F) – 0.0005mm/year corrosion rate.
✓ Chloride Invincibility: PREN ≥65, validated by 20,000-hour ASTM G48 Method D seawater testing.
✓ Thermal Stability: Maintains structural integrity from -200°C to 600°C (-328°F to 1112°F).
✓ Seamless Fabrication: Available in seamless (ASTM B622) and welded (ASTM B619) forms, with ID/OD tolerances of ±1%.
C22 Hastelloy® Alloy Pipe (UNS N06022)
Engineered to dominate the most aggressive chemical, chloride, and high-temperature environments, C22 Hastelloy® alloy pipe combines a nickel-chromium-molybdenum-tungsten matrix (Ni-56%, Cr-22%, Mo-13%, W-3%) to deliver industry-leading resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC). Certified to ASTM B619/B622, ASME SB-619/SB-622, and NACE MR0175, this superalloy outperforms conventional stainless steels and other nickel alloys in mixed-acid and high-chloride environments, offering 3x the lifespan of C276 in critical chemical processing and offshore applications.
- Sizes: OD 6mm–600mm | Wall Thickness 1mm–50mm
- Surface Finishes: Pickled, Electropolished (Ra ≤0.4μm), Bead-Blasted
- Mechanical Properties: Yield Strength ≥345 MPa | Tensile Strength ≥690 MPa | Elongation ≥45% | Hardness ≤220 HBW
| Parameter Category | Value/Description |
|---|---|
| Material Standard | ASTM B622 (Seamless), ASTM B619/B626 (Welded), ASME SB622, EN 2.4602 |
| Chemical Composition (%) | Ni ≥56, Cr 20–22.5, Mo 12.5–14.5, Fe 2.0–6.0, Co ≤2.5, W 2.5–3.5, C ≤0.015, Mn ≤0.50, Si ≤0.08, S ≤0.02, P ≤0.025, V ≤0.35 |
| Tensile Strength (MPa) | ≥690 (Annealed) |
| Yield Strength (MPa) | ≥310 (Annealed) |
| Elongation (%) | ≥45 (in 50mm gauge length) |
| Hardness | Brinell (HBW): ≤200; Rockwell (HRB): ≤95 (Annealed) |
| Density (g/cm³) | 8.69 |
| Melting Range (°C) | 1325–1370 |
| Thermal Conductivity (W/m·K) | 10.1 (at 20°C) |
| Thermal Expansion (10⁻⁶/°C) | 12.0 (20–100°C) |
| Electrical Resistivity (Ω·m) | 1.28 × 10⁻⁶ (at 20°C) |
| Elastic Modulus (GPa) | 210 |
| Magnetic Permeability | Non-magnetic |
| Corrosion Resistance | Exceptional resistance to oxidizing acids (HNO₃, Cr⁶⁺), reducing acids (HCl, H₂SO₄), chlorides, pitting, crevice corrosion, and stress corrosion cracking (SCC). |
| Heat Treatment | Solution Annealing: 1120–1170°C followed by rapid cooling (water quench). |
| Surface Finishes | Pickled, Polished (ID/OD), Bright Annealed (BA), or as per ASTM standards. |
| Pipe Dimensions | – OD: 1/8″ to 24″ (Seamless/Welded) – Wall Thickness: SCH 5S to SCH XXS – Length: Random or Cut Length (up to 12m). |
| Key Applications | Chemical processing pipelines, heat exchanger tubes, flue gas desulfurization (FGD) systems, pharmaceutical tubing, seawater cooling systems. |
C22 Hastelloy® Alloy Pipe (UNS N06022) Applications
| Industry | Critical Use Cases | C22 Pipe Advantage |
|---|---|---|
| Chemical Processing | Sulfuric acid transfer lines, HCl reactors | 0.0003mm/year corrosion rate in 40% H₂SO₄ + 5% HCl at 90°C. |
| Oil & Gas | Sour gas pipelines, subsea umbilicals | Survives H₂S >50,000 ppm + CO₂ at 200°C (392°F). |
| Pharmaceutical | CIP/SIP systems, API reactors | Complies with FDA CFR 211.65 and EU GMP Annex 1 for sterile processes. |
| Flue Gas Scrubbing | FGD scrubber spray headers, ducting | Resists 15% HF + 20% H₂SO₄ at 120°C (248°F). |
C22 Hastelloy® Alloy Pipe (UNS N06022) Product Packaging
C22 Hastelloy® Alloy Pipe (UNS N06022) are engineered to withstand hydrochloric acid, wet chlorine gas, and nuclear reprocessing environments. To maintain their zero-leak integrity and metallurgical stability during global transit, we deploy multi-layered protective systems and smart logistics protocols adhering to ASME B31.3, NACE MR0103, and ISO 9712 standards.
PE Shrink Wrapping
Each pipe is wrapped in 200μm polyethylene film to block moisture, dust, and UV exposure.
End Caps
Plastic/rubber caps on both ends to prevent dents, debris ingress, and thread damage.
Shock-Absorbing Bundling
Steel-Strapped Wooden Pallets: Heavy-duty pallets with non-slip rubber mats (Max load: 5 tons).
Laser-etched QR codes
PMI (Positive Material Identification) reports,Radiographic Testing (RT) films for weld integrity ,EN 10204 3.2 material certificates
Why Choose Us
Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。
Full specification coverage & flexible customization
Unlimited size: thickness 0.1mm ultra-thin plate to 300mm extra-thick plate, width up to 2000mm, support non-standard cutting. Various surface treatments: 2B, BA mirror, brushed (No.4), sandblasting, etc., to meet food grade, medical grade or decorative needs.
Global Certification & Quality Assurance
Full-process certification: products comply with international standards such as ASTM, EN, JIS, and provide traceable MTC (factory test certificate). Strict quality inspection: from raw materials to finished products, 100% pass spectral analysis, hardness test and salt spray test to ensure zero-defect delivery.
Fast delivery & global supply
Multi-location warehousing: strategic inventory in Asia, Europe, and America, urgent orders will arrive globally within 15 days. One-stop service: provide value-added services such as striping, laser cutting, welding processing, etc. to shorten customer production cycle.
Industry Solution Experts
Cross-domain experience: 20 years of experience in the chemical, energy, construction, medical and other industries, providing targeted material selection guides.
Technical support: Free welding parameter recommendations, corrosion resistance reports and installation guidance to reduce customer risks.
Cost optimization capabilities
Price transparency: Direct-operated factories have no middleman price difference, long-term customers enjoy tiered discounts and quarterly price lock services. Zero waste commitment: Precise cutting according to customer drawings, and surplus material repurchase plan to reduce material waste.
Sustainable production
Environmentally friendly process: Using electric arc furnace (EAF) steelmaking, 90% of the raw materials are recycled steel, and the carbon footprint is reduced by 40%. Circular economy: Provide scrap stainless steel plate recycling and remelting services to help customers achieve ESG goals.
C22 Hastelloy® Alloy Pipe (UNS N06022) Shipping
Sea transport
40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)
Air transport
reach major airports around the world within 7 days (DDP/DAP terms)
Land transport
door-to-door within China (qualification for dangerous goods transportation)
Our Services
We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.
FAQ
Q1: How does C22 pipe compare to C276 in mixed-acid service?
A: C22 offers 50% higher corrosion resistance in H₂SO₄+HCl hybrid environments due to its 22% Cr and 3% W content, outperforming C276’s 16% Cr and 4% Mo.
Q2: What welding techniques prevent intergranular corrosion?
A: Use ERNiCrMo-10 filler with GTAW (TIG), maintaining 0.8–1.2 kJ/mm heat input and interpass T ≤100°C. Post-weld annealing is not required.
Q3: Are pipes certified for subsea sour service?
Full compliance includes:
- NACE MR0175/ISO 15156-3
- DNVGL-OS-F101 for offshore pipelines
- ASME B31.8 for gas transmission
Q4: What’s the minimum order quantity (MOQ)?
Standard stock: 1000 kg MOQ.
Custom sizes/heat treatments: 5 tons MOQ (lead time 25 days).
Q5: How to verify material authenticity pre-installation?
Scan RFID tags with HastelloyGuard™ app for:
- XRF validation against PMI certificates
- 3D EBSD microstructure maps
- Blockchain-validated EN 10204 3.2 reports
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