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Zhangzhou A453 Gr.660A Bolt
QS Fastener: Zhangzhou A453 Gr.660A Bolt
Name: Zhangzhou A453 Gr.660A Bolt
Standard: API 20F
Material: ASTM A453 Gr.660A, ASTM A286
Complete: Stud Bolt with 2 Heavy Hex Nuts
Size: M42
Length: 440mm
Impact Test: at -196 degC
Standard: API 20F
Material: ASTM A453 Gr.660A, ASTM A286
Complete: Stud Bolt with 2 Heavy Hex Nuts
Size: M42
Length: 440mm
Impact Test: at -196 degC
Quantity
Zhangzhou A453 Gr.660A Bolts are high-end fasteners specifically designed for critical service conditions in the oil, natural gas, and petrochemical industries. Manufactured in strict accordance with the API 20F standard, these bolts combine the superior performance of both ASTM A453 Gr.660A and ASTM A286 materials, delivering reliable performance under both high-temperature and cryogenic service conditions.
The product is supplied as a complete assembly, consisting of one fully threaded stud bolt and two heavy hex nuts. The specific size is M42, with a total length of 440mm. The product has successfully passed the -196°C ultra-low temperature impact test, demonstrating exceptional resistance to brittle fracture in extreme cryogenic environments such as liquefied natural gas (LNG) applications, fully meeting the stringent requirements of cryogenic service for fasteners.
Material Advantages
Zhangzhou A453 Gr.660A Bolts are manufactured from A286 (UNS S66286), a precipitation-hardening iron-nickel-chromium based superalloy. This material maintains excellent high-temperature yield strength up to 650°C, offers good creep-rupture resistance, and simultaneously retains outstanding ductility at ultra-low temperatures. The coefficient of thermal expansion of this A453 Gr.660A material (approximately 16.0 x 10⁻⁶/°C) closely matches that of austenitic stainless steel flanges, effectively reducing bolt relaxation caused by thermal cycling. For Class D applications, this material meets NACE MR0175 requirements with a maximum hardness of 35 HRC, providing good resistance to sulfide stress corrosion cracking.
Zhangzhou A453 Gr.660A Bolts are manufactured from A286 (UNS S66286), a precipitation-hardening iron-nickel-chromium based superalloy. This material maintains excellent high-temperature yield strength up to 650°C, offers good creep-rupture resistance, and simultaneously retains outstanding ductility at ultra-low temperatures. The coefficient of thermal expansion of this A453 Gr.660A material (approximately 16.0 x 10⁻⁶/°C) closely matches that of austenitic stainless steel flanges, effectively reducing bolt relaxation caused by thermal cycling. For Class D applications, this material meets NACE MR0175 requirements with a maximum hardness of 35 HRC, providing good resistance to sulfide stress corrosion cracking.
Typical Applications
Zhangzhou A453 Gr.660A Bolts are ideally suited for the following fields:
- Liquefied Natural Gas (LNG) Plants: Certified via -196°C impact testing, ensuring safe use in flange connections for cryogenic storage and transfer systems.
- Petrochemical Facilities: Critical fastening of high-temperature, high-pressure flange joints in refineries and chemical plants.
- Pressure Vessels and Heat Exchangers: Essential bolted connections for high-temperature, high-pressure equipment.
- Offshore Platforms: Corrosion-resistant fastening applications in marine environments.
Zhangzhou A453 Gr.660A Bolts are ideally suited for the following fields:
- Liquefied Natural Gas (LNG) Plants: Certified via -196°C impact testing, ensuring safe use in flange connections for cryogenic storage and transfer systems.
- Petrochemical Facilities: Critical fastening of high-temperature, high-pressure flange joints in refineries and chemical plants.
- Pressure Vessels and Heat Exchangers: Essential bolted connections for high-temperature, high-pressure equipment.
- Offshore Platforms: Corrosion-resistant fastening applications in marine environments.
Overview of Zhangzhou Fastener Industry
As a key industrial manufacturing base in Fujian Province, Zhangzhou has gradually developed into one of China's major production hubs for high-performance fasteners. The region boasts comprehensive supply chain capabilities, advanced heat-treatment equipment, and a strict quality control system aligned with international standards, particularly accumulating extensive experience in high-end certifications such as API 20F. Local manufacturers demonstrate significant advantages in meeting global high-end market demands across the petrochemical, power generation, and marine engineering sectors, with particular expertise in producing specialty fasteners for extreme service conditions. Zhangzhou A453 Gr.660A Bolts exemplify the region's precision manufacturing and quality leadership, having become a reliable choice for fastener selection in critical infrastructure projects both domestically and internationally.
As a key industrial manufacturing base in Fujian Province, Zhangzhou has gradually developed into one of China's major production hubs for high-performance fasteners. The region boasts comprehensive supply chain capabilities, advanced heat-treatment equipment, and a strict quality control system aligned with international standards, particularly accumulating extensive experience in high-end certifications such as API 20F. Local manufacturers demonstrate significant advantages in meeting global high-end market demands across the petrochemical, power generation, and marine engineering sectors, with particular expertise in producing specialty fasteners for extreme service conditions. Zhangzhou A453 Gr.660A Bolts exemplify the region's precision manufacturing and quality leadership, having become a reliable choice for fastener selection in critical infrastructure projects both domestically and internationally.
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