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Mazin Fasteners is a trusted manufacturer and supplier of ASTM A193 B8 Class 3 Fasteners, proudly based in Muscat, Oman. They specialize in providing corrosion-resistant bolting solutions tailored for a variety of industrial applications. The company places a strong emphasis on precision manufacturing, rigorous quality control, and compliance with international standards. With state-of-the-art production facilities and a skilled technical team, Mazin Fasteners is known for delivering fasteners that consistently meet high standards of quality, durability, and performance. Their dedication to material traceability, timely delivery, and customer satisfaction has made them a reliable partner in the chemical, petrochemical, marine, and industrial engineering sectors.
ASTM A193 B8 Class 3 Fasteners 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 fasteners are strain-hardened, giving them greater strength compared to Class 1 and Class 2 grades. They boast impressive tensile and yield strength, along with high ductility and excellent toughness. These mechanical properties ensure they can reliably bear loads, maintain dimensional stability, and resist cracking even under moderate temperature and pressure conditions.
| Element | B7 | B8 CL3 | B8 CL3M |
| 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 CL3 Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL3M 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 | |
| B8 CL2M Class 3 | Up to 3/4 | 110 | 95 | 15 | 45 |
Material | Specification | Standards | Size | Length |
ASTM A193 B8 CL3 Fasteners | 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 Fasteners find extensive use in environments where corrosion resistance and enhanced mechanical strength are essential. You’ll commonly see them in chemical processing equipment, petrochemical plants, food and beverage industries, marine installations, and industrial piping systems. They’re also utilized in valves, pumps, heat exchangers, and flange connections that are exposed to moisture and mildly corrosive conditions. These fasteners are designed to perform reliably under moderate temperatures and mechanical stress. Their durability, cleanliness, and adherence to industry standards make them ideal for critical applications where safety is paramount.
At Mazin Fasteners, we prioritize the safe and efficient packaging of ASTM A193 B8 CL3 fasteners. Each fastener is meticulously inspected and securely packaged in durable, protective materials to prevent damage during transit. Our packaging is designed to maintain the integrity and quality of the fasteners, ensuring they arrive in optimal condition. We offer customized packaging solutions to meet specific customer requirements, reflecting our commitment to excellence and customer satisfaction.
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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