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China Suppliers 904L Stud Bolt
QS Fastener: China Suppliers 904L Stud Bolt
Name: China Suppliers 904L Stud Bolt
Material: W.Nr.1.4539
Size: M6 to M100
Length: 30 to 800 mm
Standard: ANSI/ASTM, DIN
Product Grade: A
Tensile Strength(Rm): 490 N/mm²
Elongation: 35%
Feature: High Resistance to Pitting and Stress Corrosion Cracking
Application: For Petroleum and Petrochemical Equipment, etc.
Material: W.Nr.1.4539
Size: M6 to M100
Length: 30 to 800 mm
Standard: ANSI/ASTM, DIN
Product Grade: A
Tensile Strength(Rm): 490 N/mm²
Elongation: 35%
Feature: High Resistance to Pitting and Stress Corrosion Cracking
Application: For Petroleum and Petrochemical Equipment, etc.
Quantity
The China Suppliers 904L Stud Bolt is a high-performance fastening solution manufactured from W.Nr.1.4539, a high-alloy austenitic stainless steel known for its superior corrosion resistance. As a trusted product among China suppliers, this stud bolt is engineered for demanding applications where standard fasteners would fail prematurely. Available in diameters from M6 to M100 and lengths ranging from 30 to 800 mm, the 904L stud bolt complies with ANSI/ASTM and DIN standards, ensuring dimensional accuracy and interchangeability across global projects.
Mechanical Properties and Material Advantages
With a minimum tensile strength of 490 N/mm² and an elongation rate of 35%, the China Suppliers 904L Stud Bolt offers an excellent balance of strength and ductility. These mechanical attributes make it suitable for high-load bolted connections while allowing sufficient plasticity to accommodate thermal expansion and vibration in service. The material’s chromium, nickel, and molybdenum content, combined with added copper, delivers outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC)—particularly in chloride-rich and acidic environments. This performance is critical for equipment operating in offshore platforms, desalination plants, and chemical processing units.
With a minimum tensile strength of 490 N/mm² and an elongation rate of 35%, the China Suppliers 904L Stud Bolt offers an excellent balance of strength and ductility. These mechanical attributes make it suitable for high-load bolted connections while allowing sufficient plasticity to accommodate thermal expansion and vibration in service. The material’s chromium, nickel, and molybdenum content, combined with added copper, delivers outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking (SCC)—particularly in chloride-rich and acidic environments. This performance is critical for equipment operating in offshore platforms, desalination plants, and chemical processing units.
Surface Treatment Options
To further optimize performance, China suppliers offer multiple surface treatment solutions for the 904L stud bolt, tailored to specific environmental challenges and customer preferences:
To further optimize performance, China suppliers offer multiple surface treatment solutions for the 904L stud bolt, tailored to specific environmental challenges and customer preferences:
- Polishing: Mechanical or electrochemical polishing reduces surface roughness to as low as Ra 0.1 μm. This smooth finish minimizes media adhesion, simplifies cleaning, and is ideal for hygienic applications such as food processing and pharmaceutical manufacturing.
- Passivation: Treatment with nitric or citric acid solutions generates a uniform chromium-oxide passive layer on the 904L stud bolt. This process, compliant with ASTM A967, significantly boosts corrosion resistance in seawater and chloride-laden atmospheres, making it a preferred choice for marine engineering and coastal refineries.
- Electroplating: Deposition of zinc, nickel, or chromium layers (e.g., zinc plating thickness of 5–15 μm per ISO 4042) adds sacrificial or barrier protection. This treatment suits automotive chassis components and structural connections where both corrosion and wear resistance are required.
- Coating: Application of epoxy resin or PTFE (polytetrafluoroethylene) coatings, typically 20–50 μm thick, provides chemical isolation and low friction. These coated 904L stud bolts excel in high-temperature, strong-acid, or strong-alkali conditions, such as heat exchangers and reactor vessels in petrochemical plants.
- Sandblasting: Abrasive blasting with aluminum oxide or silicon carbide produces a uniform rough surface (Ra 1.6–3.2 μm), enhancing coating adhesion and providing a matte industrial appearance. This preparation is particularly useful when subsequent field painting or sealing is anticipated.
Application Scenarios and Industries
The China Suppliers 904L Stud Bolt is widely specified in the oil and gas sector for flange connections, pressure vessels, and pipeline supports, where sour service and high chloride levels are routine. In petrochemical equipment—including distillation columns, storage tanks, and agitators—its resistance to sulfuric, phosphoric, and formic acids ensures long-term integrity. Additionally, the fastener finds growing use in flue-gas desulfurization units, waste incineration plants, and heat recovery systems, where combined thermal and corrosive stresses challenge lesser materials.
The China Suppliers 904L Stud Bolt is widely specified in the oil and gas sector for flange connections, pressure vessels, and pipeline supports, where sour service and high chloride levels are routine. In petrochemical equipment—including distillation columns, storage tanks, and agitators—its resistance to sulfuric, phosphoric, and formic acids ensures long-term integrity. Additionally, the fastener finds growing use in flue-gas desulfurization units, waste incineration plants, and heat recovery systems, where combined thermal and corrosive stresses challenge lesser materials.
By selecting the appropriate surface finish, end users can extend service intervals, reduce unplanned downtime, and lower lifecycle maintenance expenses. China suppliers of 904L stud bolts offer flexible customization in dimensions, thread forms, and surface treatments, accommodating both prototype runs and bulk procurement for large-scale infrastructure projects.
Summary
In summary, the China Suppliers 904L Stud Bolt—offered by experienced China suppliers—delivers reliable fastening performance across extreme environments. Its robust tensile strength, high elongation, and exceptional pitting/SCC resistance, combined with customizable surface finishes, make it a versatile and cost-effective choice for petroleum, chemical, marine, and hygienic applications. When system reliability and safety are paramount, specifying the 904L stud bolt ensures durable, maintenance-friendly connections that meet stringent international standards.
In summary, the China Suppliers 904L Stud Bolt—offered by experienced China suppliers—delivers reliable fastening performance across extreme environments. Its robust tensile strength, high elongation, and exceptional pitting/SCC resistance, combined with customizable surface finishes, make it a versatile and cost-effective choice for petroleum, chemical, marine, and hygienic applications. When system reliability and safety are paramount, specifying the 904L stud bolt ensures durable, maintenance-friendly connections that meet stringent international standards.
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