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Hastelloy C-22 Hex Head Bolt
QS Fastener: Hastelloy C-22 Hex Head Bolt
Name: Hastelloy C-22 Hex Head Bolt
Material: Hastelloy C-22
Elongation: 40%
Standard: UNS N06022/2.4602
Size: M30
Length: 100 mm
Feature:Good Anti-oxidation-reduction Performance
Application: For Chemicals and petrochemicals
Material: Hastelloy C-22
Elongation: 40%
Standard: UNS N06022/2.4602
Size: M30
Length: 100 mm
Feature:Good Anti-oxidation-reduction Performance
Application: For Chemicals and petrochemicals
Quantity
Hastelloy C-22 Hex Head Bolt, Manufactured from premium nickel-chromium-molybdenum-tungsten alloy (UNS N06022/2.4602), the Hastelloy C-22 Hex Head Bolt offers exceptional elongation (up to 40%) and is available in various specifications, including M30×100mm and other sizes. Designed for extreme chemical and petrochemical environments, it delivers superior resistance to both oxidizing and reducing media, making it the ideal fastening solution for reactors, pipelines, and high-pressure equipment.
1. Superior Alloy Composition & Corrosion Resistance
The Hastelloy C-22 Hex Head Bolt features an optimized Ni-Cr-Mo-W alloy system (Ni≥56%, Cr 20-22.5%, Mo 13.5%, W 3%), providing industry-leading corrosion resistance in:
- Oxidizing acids (e.g., HNO₃, H₂SO₄)
- Reducing acids (e.g., HCl, HF)
- Halides & mixed corrosive media
The Hastelloy C-22 Hex Head Bolt features an optimized Ni-Cr-Mo-W alloy system (Ni≥56%, Cr 20-22.5%, Mo 13.5%, W 3%), providing industry-leading corrosion resistance in:
- Oxidizing acids (e.g., HNO₃, H₂SO₄)
- Reducing acids (e.g., HCl, HF)
- Halides & mixed corrosive media
Key Advantages:
✔ High chromium content ensures stable passivation in oxidizing conditions.
✔ Molybdenum & tungsten synergy enhances resistance to reducing acids.
✔ Exceptional pitting resistance (PREN≈68), outperforming 316L, Inconel 625, and Hastelloy C-276.
✔ High chromium content ensures stable passivation in oxidizing conditions.
✔ Molybdenum & tungsten synergy enhances resistance to reducing acids.
✔ Exceptional pitting resistance (PREN≈68), outperforming 316L, Inconel 625, and Hastelloy C-276.
2. Four Core Advantages of Hastelloy C-22 Hex Head Bolt
(1) Oxidizing Acid Resistance: Stable Passivation
In nitric acid (HNO₃), sulfuric acid (H₂SO₄), and other oxidizing media, the high chromium content (20-22.5%) forms a dense Cr₂O₃ passive layer, ensuring stability:
- 65% boiling HNO₃: Corrosion rate: 0.3 mm/year (vs. 316L >10 mm/year)
- 98% H₂SO₄ (60°C): Maintains passivity (<0.1 mm/year) (vs. C-276: 0.3 mm/year)
(1) Oxidizing Acid Resistance: Stable Passivation
In nitric acid (HNO₃), sulfuric acid (H₂SO₄), and other oxidizing media, the high chromium content (20-22.5%) forms a dense Cr₂O₃ passive layer, ensuring stability:
- 65% boiling HNO₃: Corrosion rate: 0.3 mm/year (vs. 316L >10 mm/year)
- 98% H₂SO₄ (60°C): Maintains passivity (<0.1 mm/year) (vs. C-276: 0.3 mm/year)
Ideal for electroplating baths, high-oxidation industrial media, and long-term reliability.
(2) Reducing Acid Resistance: Mo-W Synergy
In hydrochloric acid (HCl), hydrofluoric acid (HF), and other reducing acids, the molybdenum (13.5%) and tungsten (3%) provide unmatched corrosion resistance:
- 10% HCl (50°C): 0.05 mm/year (vs. Inconel 625: 0.5 mm/year)
- 5% HF (30°C): <0.05 mm/year (vs. 316L: >5 mm/year)
In hydrochloric acid (HCl), hydrofluoric acid (HF), and other reducing acids, the molybdenum (13.5%) and tungsten (3%) provide unmatched corrosion resistance:
- 10% HCl (50°C): 0.05 mm/year (vs. Inconel 625: 0.5 mm/year)
- 5% HF (30°C): <0.05 mm/year (vs. 316L: >5 mm/year)
Even in HF + HNO₃ mixed acids (e.g., stainless steel pickling solutions), the Hastelloy C-22 Hex Head Bolt maintains superior performance.
(3) Halide Resistance: Industry-Leading Pitting & Crevice Corrosion Resistance
Performance in chloride-rich environments:
- Critical Pitting Temperature (CPT): ≥85°C (6% FeCl₃) (vs. C-276: 75°C)
- PREN value ≈68, far exceeding duplex 2205 (PREN≈35) and 316L (PREN≈26)
- 3.5% NaCl + 0.1M HCl: Tolerates ≥65°C (vs. 316L fails at 25°C)
Performance in chloride-rich environments:
- Critical Pitting Temperature (CPT): ≥85°C (6% FeCl₃) (vs. C-276: 75°C)
- PREN value ≈68, far exceeding duplex 2205 (PREN≈35) and 316L (PREN≈26)
- 3.5% NaCl + 0.1M HCl: Tolerates ≥65°C (vs. 316L fails at 25°C)
Real-World Example:
✔ Seawater (Cl⁻ 50,000 ppm): 20+ years service life (vs. duplex 2205 fasteners: 5-8 years)
✔ Seawater (Cl⁻ 50,000 ppm): 20+ years service life (vs. duplex 2205 fasteners: 5-8 years)
(4) Mixed Corrosive Media: Unrivaled Performance
Hastelloy C-22 Hex Head Bolt excels in complex environments (oxidizers + reducers + halides):
✔ Flue Gas Desulfurization (FGD) systems (H₂SO₄ + Cl⁻ + F⁻):
- Service life: 15 years (vs. 904L: ~3 years)
✔ Refinery sour crude (H₂S + Cl⁻ + H₂O, 200°C):
- Corrosion rate <0.1 mm/year, far outperforming other nickel alloys.
Hastelloy C-22 Hex Head Bolt excels in complex environments (oxidizers + reducers + halides):
✔ Flue Gas Desulfurization (FGD) systems (H₂SO₄ + Cl⁻ + F⁻):
- Service life: 15 years (vs. 904L: ~3 years)
✔ Refinery sour crude (H₂S + Cl⁻ + H₂O, 200°C):
- Corrosion rate <0.1 mm/year, far outperforming other nickel alloys.
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