Xiamen Carbon Steel Stud

QS Fastener: Xiamen Carbon Steel Stud

Name: Xiamen Carbon Steel Stud
Standard: ASTM
Material: Carbon Steel
Size: 5/16 to 4 inch
Lenght: 30 to 1000 mm
Surface: PTFE Coating
Feature: High Strength

Quantity

Contact Now

add to cart

Carbon Steel Stud strictly complies with ASTM standards, covering diameters from 5/16 to 4 inches (with corresponding lengths from 30 to 1000 mm). It offers high strength and excellent corrosion resistance. The surface is treated with a PTFE coating, which effectively reduces the friction coefficient and improves anti-galling performance, making it suitable for heavy-duty applications such as petrochemical plants, pipeline flanges, and pressure vessels.

Why choose PTFE coating?
PTFE (Polytetrafluoroethylene) coating is widely used on fasteners such as Carbon Steel Stud. Its advantages are as follows:

1. Extremely low friction coefficient – precise torque control
- PTFE is one of the solid materials with the lowest friction coefficient (dry film friction coefficient approx. 0.05–0.09).
- Advantage: For PTFE-coated Carbon Steel Stud, the relationship between torque and clamping force is more stable and predictable. Reliable preload can be achieved with lower torque, avoiding over-torquing or under-torquing, making it especially suitable for critical connections such as flange bolts.

2. Excellent corrosion resistance and chemical inertness
- PTFE is almost unaffected by acids, alkalis, salts, solvents, and corrosive gases.
- Advantage: Significantly improves the corrosion-resistant service life of Carbon Steel Stud in humid, chemical, marine, and other environments, reducing rust and galling risks.

3. Anti-galling and anti-seizing
- Stainless steel or coated bolts are prone to cold welding or galling during tightening. As a solid lubricant separation layer, PTFE effectively prevents direct metal-to-metal contact.
- Advantage: Even after repeated assembly and disassembly, the Carbon Steel Stud remains smooth, reducing the risk of on-site stud breakage or nut cutting, and lowering maintenance costs.

4. No need for additional lubricants
- PTFE coating has inherent lubricating properties, eliminating the need for oil or grease during assembly.
- Advantage: Clean installation, avoiding grease attracting dust or contaminating process media (e.g., food, chemical, clean piping systems), particularly suitable for demanding Carbon Steel Stud applications.

5. Wide temperature adaptability
- Typically remains stable within the range of -200°C to +260°C.
- Advantage: Suitable for operating conditions with drastic temperature changes, such as steam pipelines and low-temperature units, ensuring reliable fastening of Carbon Steel Stud in extreme environments.

6. Good electrical insulation
- PTFE is an excellent insulator.
- Advantage: In connections where galvanic corrosion or stray current needs to be avoided, PTFE-coated Carbon Steel Stud offers additional benefits.

7. Uniform and controllable coating thickness
- Can be controlled at approximately 15–30 µm without affecting thread fit accuracy.
- Advantage: Suitable for precision threads and fasteners requiring strict go/no-go gauge inspection, such as Carbon Steel Stud.

Send Message