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Fujian N06022 Fastener
QS Fastener: Fujian N06022 Fastener
Name: Fujian N06022 Fastener
Standard: ANSI, DIN
Material: W.Nr.2.4602
Size: 5/16 to 4 inch
Length: 30 to 3000 mm
Product Grade: A
Tensile Strength(Rm): 690 N/mm²
Elongation: 40%
Feature: Good resistance to pitting corrosion, crevice corrosion and stress corrosion cracking, Excellent antioxidant capacity of water medium
Application: For chemical industry, petroleum industry and Acid Corrosion Environment, etc
Standard: ANSI, DIN
Material: W.Nr.2.4602
Size: 5/16 to 4 inch
Length: 30 to 3000 mm
Product Grade: A
Tensile Strength(Rm): 690 N/mm²
Elongation: 40%
Feature: Good resistance to pitting corrosion, crevice corrosion and stress corrosion cracking, Excellent antioxidant capacity of water medium
Application: For chemical industry, petroleum industry and Acid Corrosion Environment, etc
Quantity
The Fujian N06022 Fastener is a premium nickel-chromium-molybdenum-tungsten alloy fastener manufactured in accordance with ANSI and DIN standards. Produced in Fujian Province, China – a region with a well-established industrial base and advanced metallurgical processing capabilities – this fastener series is the result of rigorous quality control, modern heat-treatment facilities, and precision machining. Local production leverages high-purity raw materials and automated cold/hot forming lines, ensuring consistent mechanical properties and dimensional accuracy across all batches. Designated as UNS N06022 and W.Nr.2.4602, this product is specifically engineered for environments where both high-temperature oxidation and aggressive chemical corrosion threaten equipment integrity.
Dimensions, Grades, and Mechanical Properties
The Fujian N06022 Fastener is available in a wide dimensional range:
- Size: 5/16 to 4 inches (diameter)
- Length: 30 to 3000 mm, with custom lengths available upon request
- Product Grade: Class A, meeting stringent ASTM and ISO requirements
- Tensile Strength (Rm): ≥ 690 N/mm², providing robust load-bearing capacity
- Elongation: 40%, reflecting excellent ductility and resistance to brittle fracture under thermal or mechanical stress
The Fujian N06022 Fastener is available in a wide dimensional range:
- Size: 5/16 to 4 inches (diameter)
- Length: 30 to 3000 mm, with custom lengths available upon request
- Product Grade: Class A, meeting stringent ASTM and ISO requirements
- Tensile Strength (Rm): ≥ 690 N/mm², providing robust load-bearing capacity
- Elongation: 40%, reflecting excellent ductility and resistance to brittle fracture under thermal or mechanical stress
These parameters ensure that the fastener performs reliably in high-pressure, high-temperature bolted connections, from small-bore instrumentation to heavy flanged joints in large process vessels.
Chemical Composition and Oxidation Resistance Mechanism
The alloy contains 20–22.5% chromium, together with substantial molybdenum and tungsten additions. At elevated temperatures, chromium reacts with oxygen to form a dense, adherent Cr₂O₃ scale. Molybdenum and tungsten contribute to the scale’s stability and reduce volatile oxide formation, significantly slowing further oxygen penetration. This synergistic effect gives the Fujian N06022 Fastener outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-laden and acidic media, while also excelling in high-temperature flue gases and combustion atmospheres.
The alloy contains 20–22.5% chromium, together with substantial molybdenum and tungsten additions. At elevated temperatures, chromium reacts with oxygen to form a dense, adherent Cr₂O₃ scale. Molybdenum and tungsten contribute to the scale’s stability and reduce volatile oxide formation, significantly slowing further oxygen penetration. This synergistic effect gives the Fujian N06022 Fastener outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-laden and acidic media, while also excelling in high-temperature flue gases and combustion atmospheres.
High-Temperature Oxidation Performance
This fastener demonstrates exceptional stability in continuous service at temperatures exceeding 1000°C. In controlled tests at 900°C for 1,000 hours in air, the material shows a mass gain of only 0.02 mg/cm² – a value markedly lower than that of standard stainless steels (often above 0.1 mg/cm²) and many other nickel-based grades. Moreover, the oxide layer exhibits strong spallation resistance during thermal cycling, making it highly suitable for processes with frequent start-ups and shutdowns. This thermal fatigue resistance directly translates to reduced maintenance intervals and extended service life for critical equipment.
This fastener demonstrates exceptional stability in continuous service at temperatures exceeding 1000°C. In controlled tests at 900°C for 1,000 hours in air, the material shows a mass gain of only 0.02 mg/cm² – a value markedly lower than that of standard stainless steels (often above 0.1 mg/cm²) and many other nickel-based grades. Moreover, the oxide layer exhibits strong spallation resistance during thermal cycling, making it highly suitable for processes with frequent start-ups and shutdowns. This thermal fatigue resistance directly translates to reduced maintenance intervals and extended service life for critical equipment.
Key Application Scenarios
1. Chemical Processing: Reactors, heat exchangers, and distillation columns handling hydrochloric acid, sulfuric acid, and mixed acid streams.
2. Petroleum Refining: Flue gas desulfurization units, sour water strippers, and high-temperature crude heater connections where sulfur and naphthenic acid corrosion are prevalent.
3. Acid Corrosion Environments: Pickling lines, scrubber systems, and waste incineration plants.
4. Power Generation: Superheater supports, gas turbine casings, and waste heat recovery units.
5. Offshore and Marine: Equipment exposed to seawater splash zones combined with elevated temperatures.
1. Chemical Processing: Reactors, heat exchangers, and distillation columns handling hydrochloric acid, sulfuric acid, and mixed acid streams.
2. Petroleum Refining: Flue gas desulfurization units, sour water strippers, and high-temperature crude heater connections where sulfur and naphthenic acid corrosion are prevalent.
3. Acid Corrosion Environments: Pickling lines, scrubber systems, and waste incineration plants.
4. Power Generation: Superheater supports, gas turbine casings, and waste heat recovery units.
5. Offshore and Marine: Equipment exposed to seawater splash zones combined with elevated temperatures.
Additional Advantages and Workability
Beyond oxidation resistance, the Fujian N06022 Fastener offers good machinability and formability, enabling consistent thread rolling and precise head shaping. Its high nickel content ensures stability in reducing environments, while the molybdenum/tungsten combination protects against localized attack even in stagnant or low-flow conditions. The material is readily weldable using matching filler metals, allowing field repairs without compromising corrosion resistance.
Beyond oxidation resistance, the Fujian N06022 Fastener offers good machinability and formability, enabling consistent thread rolling and precise head shaping. Its high nickel content ensures stability in reducing environments, while the molybdenum/tungsten combination protects against localized attack even in stagnant or low-flow conditions. The material is readily weldable using matching filler metals, allowing field repairs without compromising corrosion resistance.
Quality Assurance and Local Manufacturing Excellence
Each batch produced in Fujian undergoes 100% dimensional inspection, chemical spectrometric analysis, and mechanical testing in accredited laboratories. The provincial supply chain ensures competitive lead times and responsive technical support for both domestic and export markets. Manufacturers in Fujian employ environmentally responsible production practices, including closed-loop cooling systems and waste-stream treatment, aligning with global sustainability standards.
Each batch produced in Fujian undergoes 100% dimensional inspection, chemical spectrometric analysis, and mechanical testing in accredited laboratories. The provincial supply chain ensures competitive lead times and responsive technical support for both domestic and export markets. Manufacturers in Fujian employ environmentally responsible production practices, including closed-loop cooling systems and waste-stream treatment, aligning with global sustainability standards.
Conclusion
The Fujian N06022 Fastener is not merely a standard component – it is a dependable solution for the most demanding high-temperature oxidative and acidic environments. With its proven oxidation resistance above 1000°C, robust mechanical strength, and versatile size range, it provides long-term stable performance, reduces unplanned downtime, and lowers total ownership costs. For chemical, petrochemical, and energy sectors requiring uncompromised reliability, this fastener stands as a trusted choice. Choose Fujian N06022 Fastener – where advanced metallurgy meets precision engineering, delivered with the expertise of a leading industrial region.
The Fujian N06022 Fastener is not merely a standard component – it is a dependable solution for the most demanding high-temperature oxidative and acidic environments. With its proven oxidation resistance above 1000°C, robust mechanical strength, and versatile size range, it provides long-term stable performance, reduces unplanned downtime, and lowers total ownership costs. For chemical, petrochemical, and energy sectors requiring uncompromised reliability, this fastener stands as a trusted choice. Choose Fujian N06022 Fastener – where advanced metallurgy meets precision engineering, delivered with the expertise of a leading industrial region.
For detailed drawings, test certificates, or custom dimensions, contact our technical team for prompt assistance.
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