Ultra-Precision Drawn Round Rod Hastelloy C22 Dia 20mm for Chlorination Units

Hastelloy C22 is a premier nickel-chromium-molybdenum-tungsten superalloy engineered to provide superior overall corrosion performance compared to conventional nickel-molybdenum alloys. When supplied in cold drawn round rod form at Dia 20mm, this material delivers the optimal combination of dimensional accuracy, surface finish, and metallurgical consistency required for critical pump shafts, valve stems, agitators, fasteners, and sensor housings in chlorination equipment.

Our automated cold drawing and multi-stage precision straightening processes ensure tight diametrical tolerances (down to precise micron-level deviation) and high concentricity, significantly minimizing machining waste and tool wear for OEM component manufacturers. Every batch undergoes full solution annealing followed by rapid water quenching to completely suppress secondary phase precipitation at grain boundaries, guaranteeing maximum corrosion resistance across oxidizing acids, wet chlorine gas, ferric chlorides, and organic chloride media.

• Extreme Resistance to Wet Chlorine & Halide Pitting: Optimized chromium (22%), molybdenum (13%), and tungsten (3%) composition provides an exceptionally high Pitting Resistance Equivalent Number (PREN > 45), eliminating localized crevice attack in aggressive chlorination reactors and bleach scrubbers.
• Ultra-Tight Precision Cold Drawn Tolerances: Cold drawing followed by centerless grinding ensures precise roundness and diameter consistency on 20mm rods, allowing direct feeding into CNC turning centers without pre-machining rough cuts.
• High Structural Homogeneity & Weld Zone Stability: Controlled ultra-low carbon and silicon chemistry prevents intergranular carbide and intermetallic phase precipitation during high-temperature fabrication or welding.
• Superior Dual-Phase Media Endurance: Outstanding resilience against mixed acid streams containing strong oxidizing agents (nitric acid, ferric ions) alongside aggressive reducing solutions (hydrochloric and sulfuric acids).
• 100% Non-Destructive Flaw Detection: Every rod undergoes rigorous ultrasonic testing (UT) and eddy current inspection to guarantee internal density, zero micro-voids, and flawless sub-surface integrity.

• Chlorination Reactor Components: Shafts, impellers, mixing blades, and internal baffle supports exposed to high-concentration chlorine gas and acidic slurries.
• Corrosive Fluid Control Systems: High-pressure valve stems, needle valve cores, flanged plugs, and ball valve spindles in wet chlorine and hypochlorite dosing skids.
• Flue Gas Desulfurization (FGD) & Bleach Plants: Scrubber damper shafts, duct dampers, spray nozzle adaptors, and high-load fasteners in paper pulp bleaching.
• Pharmaceutical & Agrochemical Synthesizers: Critical rotating shafts and sampling probes working with chlorinated intermediates, catalyst carriers, and solvent recovery columns.
• Waste Water & Hazardous Effluent Treatment: Chlorination injection quills, metering pump plungers, and submerged sensor housings in continuous chemical neutralization lines.

• Integrated Smelting & Precision Drawing Lines: Changzhou DLX Alloy operates comprehensive in-house VIM (Vacuum Induction Melting), ESR (Electroslag Remelting), hot forging, cold drawing, and automated centerless grinding lines, guaranteeing end-to-end traceability from raw ingot to finished 20mm bar.
• Robust Manufacturing Capacity: Supported by a scalable monthly capacity of 1,200 metric tons across premium nickel, cobalt, and precision alloy product lines, we ensure consistent supply security for large OEM contracts and multi-stage project engineering.
• Strict Quality Assurance Protocols: Certified state-of-the-art laboratory testing including optical emission spectrometry (OES), ICP chemical analysis, tensile testing at ambient and elevated temperatures, metallurgical grain size verification, and full-length ultrasonic scanning.
• Custom Length & Surface Tailoring: Available in standard random lengths, exact fixed cut-to-length dimensions, bright annealed, peeled, or mirror-ground surface finishes tailored to exact drawing specifications.
• Export-Grade Heavy Packaging: Sealed plastic wrapping, anti-corrosion VCI barrier interlining, and reinforced solid seaworthy wooden crate packaging to eliminate all transit bending, scratch, or moisture risks.

Q1: What makes cold drawn Hastelloy C22 round rod superior to C276 in chlorination equipment?
A1: While both are exceptional Ni-Cr-Mo alloys, Hastelloy C22 contains a significantly higher chromium content (~22% vs. ~16% in C276), giving it markedly superior resistance to strongly oxidizing environments, wet chlorine gas, and mixed acid streams containing oxidizing salts commonly found in modern chlorination skids.

Q2: What dimensional tolerances and straightness can DLX achieve for 20mm drawn rods?
A2: Our Dia 20mm cold drawn and centerless ground Hastelloy C22 rods are manufactured with tight diametrical tolerances down to ±0.02mm (precision engineering grades) with straightness controlled to ≤0.5mm per meter, enabling high-speed automated CNC machining.

Q3: In what heat treatment condition is the 20mm C22 round rod delivered?
A3: All rods are delivered in the fully solution-annealed and rapidly water-quenched condition (typically soaked at 1120°C–1150°C), restoring optimum ductility, relieving cold-drawing stress, and ensuring peak corrosion resistance.

Q4: How does DLX verify the internal integrity and surface quality of high-nickel rods?
A4: Every rod is subjected to 100% full-length ultrasonic flaw detection (UT) and surface liquid penetrant / eddy current testing. Chemical composition and mechanical tensile properties are verified per melt batch and accompanied by complete 3.1 material test certificates.