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Murad Fasteners stands out as a reliable manufacturer and supplier based in Doha, Qatar, specializing in high-quality ASTM A193 B8 CL4 Stud Bolts that are perfect for tough industrial applications. With state-of-the-art manufacturing facilities and rigorous quality control measures, Murad Fasteners ensures that their stud bolts feature precise threading, exceptional dimensional accuracy, and consistent performance. These bolts are crafted to meet international standards, making them suitable for harsh environments that involve corrosion and high temperatures. Catering to industries such as oil and gas, petrochemical, power generation, and heavy engineering, Murad Fasteners is committed to providing dependable fastening solutions at competitive prices and with prompt delivery.
The ASTM A193 B8 CL4 Stud Bolts are made from austenitic stainless steel, similar to Type 304, and undergo processes like solution annealing and controlled strain hardening to boost their strength. Thanks to their chromium and nickel content, these bolts offer impressive resistance to corrosion and oxidation. Mechanically, Class 4 stud bolts deliver higher tensile and yield strength compared to standard B8 grades, along with outstanding toughness and ductility. They maintain their mechanical stability even under high temperatures, pressure, and sustained loads, ensuring reliable performance in demanding service conditions.
| 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 CL4 Stud Bolt
| IS BS ASTM | DIN, ISO, JIS, GB, IS, BS, ASTM | M 02 to M 160 | 3 mm to 200 mm |
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These ASTM A193 B8 CL4 Stud Bolts are widely utilized in scenarios that require enhanced strength and corrosion resistance. You’ll often find them in flanged joints, pressure vessels, heat exchangers, boilers, valves, and piping systems across the oil and gas, petrochemical, and power generation sectors. Their design makes them perfect for assemblies that face high pressure, thermal stress, and corrosive environments. With their durability, mechanical reliability, and extended service life, they are an excellent choice for critical industrial fastening needs.
At Murad Fasteners, we prioritize the secure packaging of our ASTM A193 B8 CL4 stud bolts to ensure they reach you in optimal condition. Each stud bolt is carefully inspected and packaged using robust, protective materials to prevent damage during transit. Our packaging solutions include detailed labeling for easy identification and handling. Whether you’re ordering small quantities or bulk, we provide customized packaging options to meet your needs, guaranteeing the safe and efficient delivery of your fasteners.
Murad Fasteners is a leading manufacturer and supplier of high-quality fasteners in Doha, Qatar, with over 8 years of experience serving global industries.
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