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Mira Fasteners stands out as a top manufacturer and supplier of ASTM A193 B8 Class 4 Stud Bolts, proudly based in Kuala Lumpur, Malaysia. These robust stainless steel stud bolts are crafted for tough applications that demand both mechanical strength and resistance to corrosion. Perfect for sectors like oil & gas, petrochemicals, power generation, and marine, Mira Fasteners guarantees that every product meets international standards through thorough testing and precise engineering. With a commitment to quality and timely delivery, Mira Fasteners has earned a solid reputation throughout Malaysia and Southeast Asia.
The ASTM A193 B8 Class 4 Stud Bolts are made from strain-hardened AISI 304 stainless steel. Thanks to cold working, these bolts achieve a minimum tensile strength of 860 MPa and a yield strength of 690 MPa, providing superior mechanical performance compared to standard Class 1 and 2 bolts. Fully threaded and non-magnetic in their annealed state, these bolts also boast excellent corrosion resistance in various environments, including exposure to moisture, chemicals, and high temperatures. Their impressive strength makes them ideal for securing pressure vessels, flanges, and heavy-duty structural assemblies.
| 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 |
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.
You’ll often find ASTM A193 B8 Class 4 Stud Bolts in high-pressure, high-vibration settings where reliable, long-lasting fastening is essential. Their ability to resist fatigue and environmental wear makes them perfect for offshore platforms, chemical processing facilities, and thermal power stations. These bolts ensure dependable joint integrity, even when faced with cyclic loading and temperature changes. Available in a variety of sizes, thread types, and finishes, B8 Class 4 stud bolts from Mira Fasteners provide a trustworthy and durable solution for critical industrial bolting needs.
At Mira 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.
Mira Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kuala lumpur, Malaysia, with over 8 years of experience serving global industries.
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