Its optimized chemistry includes:

• ‌Key Elements‌: Nickel (≥56%), Chromium (20-22.5%), Molybdenum (12.5-14.5%), Tungsten (2.5-3.5%), and low carbon (≤0.015%)‌23.
• ‌Physical Properties‌:

• Density: 8.69 g/cm³‌23
• Melting Range: 1300–1350°C‌2
• Thermal Conductivity: 9.5–12.2 W/m·K (25–500°C)‌4
  • ‌Mechanical Performance‌:
• Tensile Strength: 690–795 MPa‌34
• Yield Strength: 310–380 MPa‌34
• Elongation: ≥40%‌3

‌Product Performance Highlights‌

1. ‌Unmatched Corrosion Resistance‌:

• Resists pitting, crevice corrosion, and stress corrosion cracking (SCC) in chlorides, sulfuric acid, and seawater‌13.
• Withstands wet chlorine, hypochlorites, and二氧化氯 (ClO₂) solutions‌37.
  2. ‌High-Temperature Stability‌:
• Maintains strength up to 600°C with creep rupture life exceeding 3,000 hours at 600°C/70 MPa‌34.
  3. ‌Weldability & Fabrication‌:
• Excellent weldability with minimal susceptibility to intergranular corrosion in welded zones‌58.

‌Production Methods‌

Hastelloy C22 round bars are manufactured using precision processes:

1. ‌Hot Rolling‌: For diameters ≥20mm, ensuring uniform grain structure‌46.
2. ‌Cold Drawing‌: Enhances surface finish and dimensional accuracy for precision applications‌6.
3. ‌Solution Annealing‌: Heated to 1066°C (1950°F) followed by rapid quenching to optimize corrosion resistance‌5.
4. ‌Forging‌: Custom shapes for high-stress components like valves and pump shafts‌6.

‌Equivalent Grades & Standards‌

• ‌UNS N06022‌ (ASTM B574/B575)
• ‌Alloy 22‌ (common commercial name)‌12
• ‌EN 2.4602‌ (NiCr21Mo14W)‌26
• ‌ Nr. 2.4602‌ (DIN)‌2

‌Key Application Fields‌

Hastelloy C22 round bars are critical in industries requiring extreme durability:

1. ‌Chemical Processing‌: Reactors, heat exchangers, and piping for sulfuric/hydrochloric acid handling‌57.
2. ‌Marine Engineering‌: Seawater cooling systems, offshore platforms, and desalination plants‌78.
3. ‌Oil & Gas‌: Downhole tools, valves, and scrubbers in H₂S/CO₂-rich environments‌15.
4. ‌Pharmaceuticals‌: Equipment for corrosive drug synthesis and sterilization processes‌5.
5. ‌Pollution Control‌: Flue gas desulfurization (FGD) systems and waste incineration components‌37.

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Hastelloy C22 round bars deliver unmatched performance in the most aggressive industrial environments, combining longevity with cost efficiency. For technical specifications or custom orders, consult certified suppliers adhering to ASTM/EN standards.