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Mazin Fasteners is a trusted manufacturer and supplier of ASTM A193 B8 Class 3 Stud Bolts, proudly based in Muscat, Oman. We cater to the needs of both regional and global markets, focusing on corrosion-resistant and high-strength bolting solutions. Our company adheres to strict quality control measures and internationally recognized standards to guarantee consistent product performance. With state-of-the-art manufacturing facilities and a team of skilled technicians, Mazin Fasteners produces stud bolts designed to withstand demanding industrial conditions. Our dedication to material traceability, precision machining, and timely delivery makes us a reliable partner for chemical, petrochemical, marine, and industrial engineering projects.
ASTM A193 B8 Class 3 Stud Bolts are crafted from austenitic stainless steel, typically comparable to Type 304, featuring controlled levels of chromium and nickel for outstanding corrosion resistance. These Class 3 stud bolts are strain-hardened, which allows them to achieve greater tensile and yield strength than Class 1 and Class 2 grades. They boast impressive hardness, high ductility, and excellent toughness. These mechanical properties ensure they can bear heavy loads, maintain dimensional stability, and resist deformation even under moderate temperature and pressure conditions.
| Element | B7 | B8 | B8M |
| 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 |
| B7 | 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 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M Class 1 | All | 75 | 30 | 30 | 50 |
| B8 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 |
Material | Specification | Standards | Size | Length |
ASTM A193 B8 CL3 StudBolt | 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 Class 3 Stud Bolts find their place in a variety of applications that demand both corrosion resistance and enhanced mechanical strength. Common uses include chemical processing equipment, petrochemical plants, marine installations, food and beverage facilities, and industrial piping systems. They are frequently employed in flange connections, valves, pumps, heat exchangers, and pressure-retaining assemblies that are exposed to moisture and mildly corrosive environments. These stud bolts are known for their reliability under moderate temperatures and mechanical stress. Their durability, cleanliness, and compatibility make them an excellent choice for a wide range of industrial applications.
At Mazin Fasteners, ASTM A193 B8 CL3 stud bolts are meticulously packaged to ensure optimal protection during transit and storage. Each bolt is individually wrapped in anti-corrosive material and securely placed in durable, custom-sized boxes to prevent damage. The packaging is clearly labeled with product specifications and handling instructions for easy identification. Our commitment to careful packaging helps maintain the integrity and quality of the fasteners, ensuring they arrive in perfect condition and ready for use.
Mazin Fasteners is a leading manufacturer and supplier of high-quality fasteners in Muscat, OMAN, with over 8 years of experience serving global industries.
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