Long Stainless Steel Bolts
Weight Range ： 0.5g–500kg
Dimensional tolerance ： ±0.2mm
Long stainless steel bolts are the backbone connecting large structures to critical equipment. Its core advantages are extreme corrosion resistance and high strength. For example, bolts made of 316 material can pass more than 1,000 hours of salt spray testing. The tensile strength of A4-80 grade bolts can reach more than 800 MPa. Therefore, they can be used in harsh environments such as offshore platforms and chemical pipelines for a long time. And reliably withstand the double test of heavy load and corrosion.
Another feature is its long service life and wide application. Quality products often have a design life of more than 20 years. Its length specifications are up to 3 meters, and its diameter range is also very comprehensive. This provides a one-stop solution for special connection needs such as bridge cables. After one installation, there is basically no need for maintenance. This not only reduces the overall cost of long-term use, but also provides a solid guarantee for project safety.
Parameter
JOYEAR offers clients all over the world high-volume, highly effective export solutions for industrial components. We craft our custom metal products with skill. Our skilled team will accurately create tangible parts that meet your requirements if you send us your design files, whether they are digital drafts or prototypes.
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Thread Tolerance |
±0.2mm |
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Metric Thread |
M2 - M12 |
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Service Temperature |
≤ 1800°C |
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Surface Treatment |
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Weight |
0.5g - 500kg |
★ Our product range includes:
► Materials: Carbon steel / Mild steel / Structural steel / Stainless steel / Aluminum / Copper, etc.
► Forms: Sheets / Profiles / Tubes / Round bars / Flat bars / Square bars, etc.
Advantages
Excellent toughness
High quality long stainless steel bolts are very strong. At the same time, the plasticity is also very good. For example, A4-80 grade has a tensile strength of more than 800 MPa. The elongation can reach 15% to 25%.
It will not snap suddenly under high load. Instead, significant extensional deformation occurs first. This provides early warning time for structural safety. This feature is critical for impact-resistant equipment base and bridge connections.
Excellent fatigue resistance
High-quality bolts have smooth surfaces and less stress concentration. Its threads are roll formed. This process increases the fatigue limit by approximately 30% compared to thread turning. It remains intact in cyclic load tests up to 10 million times.
This is extremely important for equipment that vibrates for a long time, such as wind turbine towers and reciprocating machinery. It can effectively prevent fatigue fracture accidents.
Long service life
Long stainless steel bolts come in a wide range of sizes. The length can reach more than 1.2 meters. Diameters cover M6 to M100. It can meet most structural connection needs.
Its design life is more than 20 years. Realizing "once installation, long-term use". The comprehensive life cycle cost is much lower than ordinary bolts that require regular maintenance.
Low defect rate
High-quality bolts are manufactured from refined furnace steel. The material is of high purity. The content of harmful impurities such as sulfur and phosphorus is less than 0.03%. With automated precision cold heading and online inspection, the product size pass rate exceeds 99.9%.
The internal defect rate is less than 50 parts per million. This high degree of consistency ensures smooth batch installation in large projects. Project delays caused by individual quality issues are avoided.
why choose us
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► Strength and reliability
- The tensile strength can reach more than 800 MPa. Remains stable in heavy loads and vibration environments. Provide solid mechanical support for key structures. Effectively prevent unexpected failures caused by insufficient strength.
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► Adaptable
- The length can be flexibly selected from a few centimeters to several meters. Diameters cover common engineering specification ranges. It can meet the connection needs of various spans and spaces. It is an ideal choice to solve the installation problems of special structures.
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► Stable quality
- Made from refined steel and precision manufacturing processes. Product size and performance are highly consistent. Smooth and efficient during high-volume installations. Avoid project delays or rework caused by individual quality issues.
production process
Material cutting
- Cut stainless steel discs or rods to required length. Precise blanks are prepared for subsequent forming operations.
Cold heading forming
- The blank is forged through a die at room temperature. Preliminarily form the shape of the head and shank of the bolt. This process also increases the density of the material.
Thread rolling
- A thread rolling machine is used to process threads through plastic deformation. This process strengthens the metal fiber structure in the threaded area. Thereby improving the overall strength and fatigue resistance of the bolt.
Heat treatment
- The bolt is heated and then cooled quickly. This process dissolves carbides and relieves internal stresses. Ultimately restoring the material's optimum corrosion resistance.
Surface treatment
- Use pickling solution for treatment. The purpose is to remove free iron impurities from the surface. And form a dense chromium oxide passivation film to enhance rust prevention ability.
Final inspection and packaging
- Inspect the size, performance and surface of the product. After passing the test, we will carry out rust-proof packaging. Ensure products meet standards and are delivered safely.
Price & Order
Provide a quote, ensure that the order quantity is accurate, and include all relevant details,
such as the terms of payment, the terms of trade, the type of packaging, etc.
Production & Shipping
Follow the original drawings and samples exactly when producing the goods.
It was carefully packaged and delivered to the clients following a final inspection.
★ ★ ★ F A Q ★ ★ ★
Does your quotation include all costs? Is it FOB, CIF or other terms?
- We usually quote EXW (ex factory) price. This is the clearest possible base price. You can ask us or your freight forwarder to quote the FOB or CIF price as needed. All fee details are listed separately.
How long is the production cycle of standard products?
- When regular specifications are in stock, they can be shipped in 1-2 weeks. Mass production orders usually take 4-6 weeks. The specific time will be stated in writing at the time of order confirmation.
Can the packaging ensure that it will not rust after shipping?
- We use industrial packaging with anti-rust oil and vacuum film. Desiccant will be added. Then packed into sturdy export wooden boxes or pallets. This can effectively prevent moisture and ensure the quality after long-distance shipping. Special packaging requirements can be stated in advance.
Does it support non-standard customization? Like a special length or head shape?
- Customization is supported. We can produce special lengths, diameters and head shapes. Please provide drawings or detailed specifications. Customized products involve mold fees and longer production cycles.
What is the payment method?
- The standard payment method is: 30% deposit after order confirmation. 70% balance payment is required before shipment. For long-term customers, more flexible payment methods can be discussed.
What should I do if quality problems are found after the goods arrive in my country?
- We provide warranty. If you find material or manufacturing defects within 30 days after picking up the goods, please provide evidence. After verification, we will negotiate restocking, refund or discount compensation for the next order.
Do you have relevant international certifications?
- The factory holds ISO 9001 certification. Products comply with ISO, DIN, ASTM and other standards. If you need specific certification (such as CE), please inform us in advance. This may affect costs and delivery times.
Will Chinese holidays (such as Spring Festival) affect delivery?
- It will. Production and logistics will be delayed for about a month before and after the Chinese New Year (January-February). We will advise you of possible delays in advance. It is recommended that you avoid this time period to arrange urgent orders.
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