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Rinku Fasteners, located in Kolkata, India, has built a solid reputation as a reliable manufacturer and supplier of top-notch industrial fasteners, including ASTM A193 B8 Nuts. Renowned for their precision engineering and durability, these nuts meet international standards and are crafted for high-strength, corrosion-resistant applications. With cutting-edge manufacturing techniques and strict quality control, Rinku Fasteners ensures that each nut performs reliably even in tough conditions. Perfect for securing essential assemblies in pipelines, pressure vessels, and industrial machinery, ASTM A193 B8 Nuts from Rinku Fasteners offer exceptional mechanical strength, corrosion resistance, and longevity, making them a go-to choice for industries that need trustworthy fastening solutions.
ASTM A193 B8 Nuts are crafted from austenitic stainless steel, featuring 18% chromium and 8% nickel, along with low carbon content to boost corrosion resistance. This unique composition provides outstanding protection against oxidation, acids, and general corrosion. On the mechanical side, these nuts deliver high tensile and yield strength, dependable fatigue resistance, and good ductility. Their ability to maintain structural integrity under stress and high temperatures makes them ideal for critical industrial applications. ASTM A193 B8 Nuts blend toughness, strength, and corrosion resistance, ensuring reliable performance where standard nuts might fall short.
| Element | B8 CL3 | B8 CL3 | B8M CL3 |
| Carbon | 0.37 – 0.49% | 0.08% max | 0.08% max |
| Manganese | 0.65 – 1.10% | 2.00% max | 2.00% max |
| Phosphorus, max | 0.035% | 0.045% | 0.045% |
| Sulfur, max | 0.040% | 0.030% | 0.030% |
| Silicon | 0.15 – 0.35% | 1.00% max | 1.00% max |
| Chromium | 0.75 – 1.20% | 18.0 – 20.0% | 16.0 – 18.0% |
| Nickel | 8.0 – 11.0% | 10.0 – 14.0% | |
| Molybdenum | 0.15 – 0.25% | 2.00 – 3.00% |
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
| B8 CL3 | Up to 2-1/2 | 125 | 105 | 16 | 50 |
| 2-5/8 – 4 | 115 | 95 | 16 | 50 | |
| 4-1/8 – 7 | 100 | 75 | 18 | 50 | |
| B8 CL3 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M CL3 Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL3 Class 2 | Up to 3/4 | 125 | 100 | 12 | 35 |
| 7/8 – 1 | 115 | 80 | 15 | 35 | |
| 1-1/8 – 1-1/4 | 105 | 65 | 20 | 35 | |
| 1-3/8 – 1-1/2 | 100 | 50 | 28 | 45 | |
| B8M CL3 Class 2 | Up to 3/4 | 110 | 95 | 15 | 45 |
| 7/8 – 1 | 100 | 80 | 20 | 45 | |
| 1-1/8 – 1-1/4 | 95 | 65 | 25 | 45 | |
| 1-3/8 – 1-1/2 | 90 | 50 | 30 | 45 |
|
Material |
Specification |
Standards |
Size
|
Length |
|
ASTM A193 B8 CL3 Bolt
|
IS
BS
ASTM
|
DIN, ISO, JIS, GB, IS, BS, ASTM |
M 02 to M 160
|
3 mm to 200 mm
|
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
ASTM A193 B8 Nuts find extensive use in industries that demand high-strength and corrosion-resistant fasteners, such as chemical processing, petrochemical, power generation, and oil and gas sectors. They are typically paired with bolts to secure flanges, pressure vessels, pipelines, and machinery that face high pressure, temperature, or corrosive environments. These nuts ensure reliable joint integrity, making them essential for maintaining safety and performance in challenging conditions.
At Rinku Fasteners, we ensure that our ASTM A193 B8 CL3 bolts are meticulously packaged to maintain their integrity and quality during transit. Each bolt is carefully inspected and packed in sturdy, corrosion-resistant materials to prevent damage. Our packaging solutions include custom labeling and secure sealing, guaranteeing safe delivery and easy identification. Whether shipped locally or internationally, our packaging standards meet all regulatory requirements, ensuring our bolts arrive in perfect condition, ready for immediate use in your projects.
Rinku Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kolkata, India, with over 8 years of experience serving global industries.
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