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Mazin Fasteners, based in Muscat, Oman, is a trusted manufacturer and supplier of high-quality industrial fasteners, including ASTM A193 B8 CL2 bolts. These bolts are produced according to strict international standards, ensuring precision, durability, and consistent performance. Designed for demanding industrial applications, ASTM A193 B8 CL2 bolts are widely used in oil and gas, petrochemical, power generation, and heavy engineering industries. With advanced manufacturing processes and rigorous quality control, Mazin Fasteners provides bolts that deliver reliable, long-lasting, and safe fastening solutions for critical assemblies.
ASTM A193 B8 CL2 bolts are made from austenitic stainless steel containing chromium and nickel, offering excellent corrosion and oxidation resistance. Class 2 indicates solution-annealed and strain-hardened material, providing moderate tensile strength along with good toughness and ductility. These bolts maintain mechanical stability under continuous loads and elevated temperatures, making them suitable for standard-duty applications in mildly corrosive or high-temperature environments.
| 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 | |
| B8M 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 CL2 Hex 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.
ASTM A193 B8 CL2 bolts are widely used in high-temperature and corrosive environments, such as in the oil and gas, petrochemical, and power generation industries. Their high strength and resistance to oxidation make them suitable for securing critical components in machinery, pressure vessels, and piping systems. Common applications include flanged connections, reactor vessels, and steam pipelines. These bolts ensure reliable performance and durability under extreme conditions, making them essential for safety and efficiency in demanding industrial settings.
These bolts are commonly used in flanged connections, pipelines, pressure vessels, valves, and heat exchangers. They are ideal for chemical plants, refineries, power stations, and marine environments where corrosion resistance and reliability are essential. ASTM A193 B8 CL2 bolts provide secure and durable fastening solutions, ensuring long-term performance and safety in industrial assemblies.
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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