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Ramu Fasteners is a trusted manufacturer and supplier based in Hyderabad, specializing in precision-engineered fastening solutions like **ASTM A193 B8 Class 4 Stud Bolts**. With state-of-the-art production facilities and rigorous quality control measures, the company guarantees consistent performance that meets international standards. Ramu Fasteners caters to essential industries such as chemical processing, oil and gas, power generation, and marine applications. By prioritizing material integrity, precise threading, and prompt delivery, the company has earned a solid reputation for providing durable and corrosion-resistant stud bolts that can handle demanding service conditions. Ramu Fasteners, a leading manufacturer and supplier in Hyderabad, India, proudly offers ASTM A193 B8 CL4 stud bolts. Renowned for their superior tensile strength and resistance to high temperatures and corrosion, these stud bolts are essential for critical industrial applications. Ideal for use in the oil and gas, petrochemical, and power generation sectors, they ensure exceptional reliability and durability. Trust Ramu Fasteners for premium-quality stud bolts tailored to meet your demanding operational needs.
ASTM A193 B8 Class 4 Stud Bolts are crafted from austenitic stainless steel, usually Grade 304, with a carefully controlled chemical composition to boost strength. These Class 4 bolts undergo strain hardening, giving them higher tensile and yield strength compared to standard B8 grades. They boast excellent corrosion resistance, good ductility, and non-magnetic properties when in the annealed state. These stud bolts deliver reliable performance in moderate temperatures, ensuring structural integrity, toughness, and fatigue resistance even in corrosive environments.
| 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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ASTM A193 B8 CL4 Stud Bolts are extensively utilized in settings that demand both corrosion resistance and enhanced mechanical strength. You’ll often find them in chemical plants, offshore platforms, marine systems, food processing facilities, and pharmaceutical industries. These stud bolts are perfect for flange connections, piping systems, valves, pumps, and heat exchangers that are exposed to moisture and corrosive substances. Their ability to perform reliably under pressure and in clean, hygienic environments makes ASTM A193 B8 CL4 Stud Bolts a top choice for fastening solutions.
At Ramu 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.
Ramu Fasteners is a leading manufacturer and supplier of high-quality fasteners in Hyderabad, India, with over 8 years of experience serving global industries.
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