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Jiangsu B8 Studs
QS Fastener: Jiangsu B8 Studs
Name: Jiangsu B8 Studs
Length: 130mm
Application: For Low Temperature Service, Widely Used in the Assembling of Industrial Pipe and Valves
Material: AISI 304 Stainless Steel
Size: 1 Inch,
Standard: ANSI B18.31.2
Length: 130mm
Application: For Low Temperature Service, Widely Used in the Assembling of Industrial Pipe and Valves
Material: AISI 304 Stainless Steel
Size: 1 Inch,
Standard: ANSI B18.31.2
Quantity
Jiangsu B8 Studs, manufactured in accordance with the stringent ASTM A320 specification, are premium fasteners specifically engineered for low-temperature environments. These studs are widely used in the assembly of industrial piping systems, pressure vessels, valves, and flanges where reliable bolting is critical. With the growing demand for specialized fasteners in the chemical, energy, and cryogenic sectors, Jiangsu Province has emerged as a significant manufacturing hub, producing high-quality B8 studs that meet international standards.
Jiangsu, particularly cities like Dongtai and Changzhou, has developed a robust fastener manufacturing ecosystem. Local manufacturers leverage proximity to major ports such as Shanghai and Ningbo, ensuring efficient export logistics and competitive pricing. The region's specialization in stainless steel fasteners, combined with access to premium raw materials like Qingshan steel, has positioned Jiangsu as a reliable source for ASTM A320 B8 studs globally.
Material Composition
The Jiangsu B8 Studs are manufactured from AISI 304 stainless steel (UNS S30400), offering excellent corrosion resistance and toughness at cryogenic temperatures. The chemical composition meets ASTM A320 requirements: Carbon ≤0.08%, Chromium 18.0-20.0%, Nickel 8.0-11.0%, Manganese ≤2.0%, Silicon ≤1.0%, Phosphorus ≤0.045%, Sulfur ≤0.030%, Molybdenum ≤0.75%, and Nitrogen ≤0.10%. This precise chemistry ensures the studs maintain their austenitic structure even at temperatures as low as -196°C (-320°F), making them suitable for low-temperature service without the risk of brittle fracture.
Mechanical Properties
Jiangsu B8 Studs are available in two classes:
B8 Class 1 (Solution Annealed): Tensile Strength ≥515 MPa (75 ksi), Yield Strength ≥205 MPa (30 ksi), Elongation ≥40%, and Hardness ≤192 HB (Rockwell B90).
B8 Class 2 (Strain Hardened): Tensile Strength ≥860 MPa (125 ksi), Yield Strength ≥690 MPa (100 ksi), Elongation ≥12%, and Hardness 248-352 HB (Rockwell C25-35).
All mechanical properties are verified through rigorous testing per ASTM E8 (tensile) and ASTM E18/E10 (hardness) standards. Jiangsu manufacturers implement strict quality control procedures, ensuring each batch meets or exceeds these specifications.
Corrosion Resistance
ASTM A320 B8 Studs exhibit outstanding resistance to intergranular corrosion, pitting, and stress corrosion cracking. In chloride environments, the critical pitting temperature (CPT) is 20-25°C per ASTM G48 Method A. After passivation treatment per ASTM A967, these studs demonstrate salt spray resistance exceeding 96 hours (ASTM B117), outperforming carbon steel alternatives significantly.
Applications and Specifications
Jiangsu B8 Studs are widely used in:
- Low-temperature piping systems and flange connections
- Cryogenic equipment and refrigeration plants
- Chemical processing facilities
- Energy sector applications
- Oil and gas industry components
- Low-temperature piping systems and flange connections
- Cryogenic equipment and refrigeration plants
- Chemical processing facilities
- Energy sector applications
- Oil and gas industry components
The product is available in a 1-inch diameter, 130mm length, conforming to ANSI B18.31.2 dimensional standards for continuous and double-end studs. For studs exceeding 1-inch diameter, the 8UN thread series is standard. Matching nuts should be specified per ASTM A194 Grade 8 for optimal performance.
Conclusion
Jiangsu B8 Studs offer a reliable, high-performance fastening solution for demanding low-temperature environments. Leveraging Jiangsu's established manufacturing infrastructure and quality assurance systems, these fasteners deliver consistent quality, excellent corrosion resistance, and dependable mechanical properties. Whether for standard piping assemblies or specialized cryogenic applications, ASTM A320 B8 Studs from Jiangsu represent the trusted choice for engineers and procurement professionals worldwide.
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