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Yuyao Thread Rod
QS Fastener: Yuyao Thread Rod
Name: Yuyao Thread Rod
Material: Incoloy 800HT
Product Grade: A
Size: 5/16 to 4 inch
Length: 30 to 3000 mm
Elongation: 35%
Standard: DIN, ANSI
Feature: High Temperature Corrosion Resistance, Good Resistance to Stress Corrosion, Good Processability
Application: For Nitric Acid condenser, Steam Heating Tube, Heating Element Tube, The Temperature of 500℃ Environment
Material: Incoloy 800HT
Product Grade: A
Size: 5/16 to 4 inch
Length: 30 to 3000 mm
Elongation: 35%
Standard: DIN, ANSI
Feature: High Temperature Corrosion Resistance, Good Resistance to Stress Corrosion, Good Processability
Application: For Nitric Acid condenser, Steam Heating Tube, Heating Element Tube, The Temperature of 500℃ Environment
Quantity
The Yuyao Thread Rod, manufactured from premium Incoloy 800HT (DIN W.Nr.1.4959) material, represents a Grade A fastening solution engineered for demanding high-temperature and corrosive applications. Available in sizes ranging from 5/16 to 4 inches and lengths from 30 mm to 3000 mm, these threaded rods deliver exceptional performance with an elongation rate of 35%, ensuring outstanding toughness and durability.
Material Excellence
Incoloy 800HT is a nickel-iron-chromium alloy with precisely controlled carbon, aluminum, and titanium content, providing significantly higher creep rupture strength than standard Incoloy 800. The alloy's high chromium content (19-23%) forms a dense Cr₂O₃ oxide layer, delivering superior corrosion resistance in oxidizing environments. In 65% nitric acid at boiling temperature, the corrosion rate remains below 0.1 mm/year, while in 98% nitric acid at room temperature, it achieves <0.05 mm/year.
Incoloy 800HT is a nickel-iron-chromium alloy with precisely controlled carbon, aluminum, and titanium content, providing significantly higher creep rupture strength than standard Incoloy 800. The alloy's high chromium content (19-23%) forms a dense Cr₂O₃ oxide layer, delivering superior corrosion resistance in oxidizing environments. In 65% nitric acid at boiling temperature, the corrosion rate remains below 0.1 mm/year, while in 98% nitric acid at room temperature, it achieves <0.05 mm/year.
The high nickel content (30-35%) ensures excellent resistance to reducing media. In 10% sulfuric acid at room temperature, corrosion rates are <0.1 mm/year, and in 50% sulfuric acid at 80°C, rates remain <0.5 mm/year. The alloy demonstrates exceptional resistance to chloride stress corrosion cracking (Cl-SCC), withstanding boiling 42% MgCl₂ solution for over 1000 hours without failure.
Key Features and Specifications
- Standards Compliance: DIN and ANSI international standards
- Temperature Range: Stable performance up to 500°C
- Corrosion Resistance: Excellent resistance to oxidizing media, reducing acids, and chloride stress corrosion
- Processability: Superior machinability for precision manufacturing
- Mechanical Properties: Elongation of 35% ensures durability under stress
- Standards Compliance: DIN and ANSI international standards
- Temperature Range: Stable performance up to 500°C
- Corrosion Resistance: Excellent resistance to oxidizing media, reducing acids, and chloride stress corrosion
- Processability: Superior machinability for precision manufacturing
- Mechanical Properties: Elongation of 35% ensures durability under stress
Application Scenarios
The Yuyao Thread Rod is specifically designed for critical applications including:
- Nitric Acid Condensers: Exceptional resistance to nitric acid corrosion in chemical processing
- Steam Heating Tubes: Maintains mechanical integrity under thermal cycling
- Heating Element Tubes: Reliable performance in high-temperature environments
- High-Temperature Equipment (500°C): Stable performance in petrochemical processing, industrial furnaces, and heat exchangers
The Yuyao Thread Rod is specifically designed for critical applications including:
- Nitric Acid Condensers: Exceptional resistance to nitric acid corrosion in chemical processing
- Steam Heating Tubes: Maintains mechanical integrity under thermal cycling
- Heating Element Tubes: Reliable performance in high-temperature environments
- High-Temperature Equipment (500°C): Stable performance in petrochemical processing, industrial furnaces, and heat exchangers
Additional applications include pressure vessels, reformer outlet pigtails, gas scrubbing plant components, and seawater cooling equipment.
Yuyao's Fastener Industry Excellence
Yuyao, located in Zhejiang Province, has established itself as a premier fastener manufacturing hub in China. The region hosts over 50 fastener export enterprises, with products including expansion bolts, stainless steel screws, and nuts exported to North America, the EU, Southeast Asia, the Middle East, Russia, and Japan. The industry benefits from significant cluster economies, with over three-quarters of fastener export manufacturers concentrated in Zhangting Town and Yaobei Industrial Zone, accounting for more than 80% of the city's fastener exports.
Yuyao, located in Zhejiang Province, has established itself as a premier fastener manufacturing hub in China. The region hosts over 50 fastener export enterprises, with products including expansion bolts, stainless steel screws, and nuts exported to North America, the EU, Southeast Asia, the Middle East, Russia, and Japan. The industry benefits from significant cluster economies, with over three-quarters of fastener export manufacturers concentrated in Zhangting Town and Yaobei Industrial Zone, accounting for more than 80% of the city's fastener exports.
The Yuyao fastener industry has demonstrated remarkable growth, with export value reaching millions of dollars annually. Local manufacturers like Ningbo Shidai Auto Parts Co., Ltd. (formerly Yuyao Standard Parts General Factory) have evolved into high-tech enterprises with extensive patent portfolios. Companies such as Zhejiang Jieneng Auto Parts Co., Ltd. have achieved ISO/TS16949 certification and supply major automotive manufacturers across China, producing over 400 product varieties including high-strength bolts, nuts, pins, and washers.
Quality Assurance and Sustainability
Yuyao Thread Rod products undergo rigorous quality control, including chemical analysis, hardness testing, metallographic examination, tensile testing, surface inspection, and salt spray testing. The industry has embraced sustainable practices with centralized waste treatment platforms achieving 40% efficiency improvement and 25% cost reduction in waste oil and gas treatment.
Yuyao Thread Rod products undergo rigorous quality control, including chemical analysis, hardness testing, metallographic examination, tensile testing, surface inspection, and salt spray testing. The industry has embraced sustainable practices with centralized waste treatment platforms achieving 40% efficiency improvement and 25% cost reduction in waste oil and gas treatment.
Conclusion
The Yuyao Thread Rod in Incoloy 800HT represents a superior fastening solution for extreme environments. Combining exceptional corrosion resistance, high-temperature stability, and excellent mechanical properties, these threaded rods deliver reliability and safety in chemical, energy, and high-temperature industrial applications. Supported by Yuyao's robust manufacturing infrastructure and quality assurance systems, these products continue to gain recognition in global markets.
The Yuyao Thread Rod in Incoloy 800HT represents a superior fastening solution for extreme environments. Combining exceptional corrosion resistance, high-temperature stability, and excellent mechanical properties, these threaded rods deliver reliability and safety in chemical, energy, and high-temperature industrial applications. Supported by Yuyao's robust manufacturing infrastructure and quality assurance systems, these products continue to gain recognition in global markets.
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