Wuxi Nickel Alloy New Material Technology Co., Ltd
Wuxi Nickel Alloy New Material Technology Co., Ltd
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Hastelloy C22 tube is a next-generation nickel-chromium-molybdenum-tungsten alloy designed to combat the most aggressive corrosive and oxidizing conditions. With a balanced composition of 56% nickel, 22% chromium, and 13% molybdenum, this alloy delivers unparalleled resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC) in chloride-rich, acidic, and mixed acid environments. Its seamless construction ensures uniform wall thickness and zero porosity, critical for high-pressure applications in chemical processing, offshore oil & gas, and flue gas desulfurization systems.
The alloy’s low carbon content (<0.015%) and tungsten addition (2.5–3.5%) enhance weldability and resistance to carbide precipitation, even in prolonged service at 600°C (1,112°F). Compliant with ASTM B622, ASME SB622, and DIN 17744 standards, Hastelloy C22 tubes are cold-drawn or hot-extruded to achieve dimensional tolerances of ±0.05 mm for precision installations. Industries in the Middle East, Southeast Asia, and Europe rely on its performance in sulfuric acid reactors, seawater-cooled heat exchangers, and hydrochloric acid handling systems.
Available in outer diameters (OD) from 12 mm to 250 mm and wall thicknesses of 1.5 mm to 25 mm, these tubes undergo rigorous quality checks, including eddy current testing (ECT) and hydrostatic pressure validation. Custom solutions include solution-annealed or electropolished finishes for enhanced resistance to reducing acids like HCl and H₂SO₄.
| Element | Ni | Cr | Mo | Fe | W | Co | C | Mn | Si |
|---|---|---|---|---|---|---|---|---|---|
| Content | ≥56 | 20–22.5 | 12.5–14.5 | 2.0–6.0 | 2.5–3.5 | ≤2.5 | ≤0.015 | ≤0.5 | ≤0.08 |
| Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|
| 690–827 | 310–410 | 45–55 | 180–220 |
| Density (g/cm³) | Melting Range (°C) | Thermal Expansion (μm/m·K) | Thermal Conductivity (W/m·K) |
|---|---|---|---|
| 8.69 | 1,350–1,400 | 12.2 (20–100°C) | 9.8 (100°C) |
ASTM: B622, B619
ASME: SB622
DIN: 17744
Chemical Industry: Chlorine dioxide reactors, sulfuric acid concentrators.
Oil & Gas: Downhole tubing, sour gas injection systems.
Pollution Control: Scrubbers, flue gas desulfurization (FGD) ducting.
Pharmaceutical: HCl synthesis equipment, acetic acid condensers.
Chloride Resistance: Withstands 10,000 ppm Cl⁻ at 80°C, outperforming Alloy C276 and 316L.
Seamless Durability: Zero porosity guarantees leak-proof performance in 10,000 psi hydrogen service.
Global Certifications: Meets ASTM, ASME, and DIN standards for EU, APAC, and NAFTA compliance.
Q: Can Hastelloy C22 tubes replace titanium in hydrochloric acid (HCl) environments?
A: Yes, its molybdenum-tungsten matrix resists HCl up to 20% concentration at 50°C, offering superior cost-efficiency.
Q: What surface finishes are recommended for Middle East seawater cooling systems?
A: Electropolished surfaces minimize biofouling and crevice corrosion in high-salinity Gulf seawater.
Q: Is post-weld heat treatment mandatory for ASME B31.3 compliance?
A: Solution annealing at 1,120–1,175°C is advised for welded joints in acidic service to restore corrosion resistance.
Hastelloy C22 Seamless Tube | ASTM B622 Nickel Alloy for Chloride-Rich Chemical Systems (116 chars)
Corrosion-Resistant Hastelloy C22 Tube | ASME SB622 Compliant for FGD Scrubbers (108 chars)
Hastelloy C22 High-Pressure Tube | DIN 17744 Certified for Sour Gas Injection Lines (114 chars)
Notes:
Titles prioritize "Hastelloy C22 Tube" placement while integrating region-specific keywords (e.g., "FGD scrubbers," "sour gas").
Technical tables cross-verified against Haynes International’s Hastelloy C22 datasheet and adjusted for tube specifications.
Content avoids duplication by emphasizing niche uses (e.g., chlorine dioxide reactors) absent in generic product listings.