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Mazin Fasteners is a trusted manufacturer and supplier of ASTM A193 B8C Bolts, proudly based in Muscat, Oman. We specialize in providing top-notch stainless steel bolting solutions for both regional and international industries. Our commitment to precision manufacturing, rigorous quality control, and adherence to international standards sets us apart. With state-of-the-art production facilities and a talented technical team, we create bolts that excel in corrosion resistance and reliable performance. Our dedication to material traceability, consistent quality, and timely delivery makes us a go-to partner for chemical, petrochemical, marine, and industrial engineering projects.
ASTM A193 B8C Bolts are crafted from austenitic stainless steel, which is equivalent to Type 347 and stabilized with columbium (niobium). This unique composition offers outstanding resistance to intergranular corrosion, especially at high temperatures. The alloy is enriched with chromium and nickel to enhance corrosion resistance, along with stabilization elements that boost high-temperature performance. These bolts are known for their impressive tensile strength, high ductility, and exceptional toughness. Their mechanical properties guarantee dimensional stability, resistance to sensitization, and dependable performance in challenging thermal and corrosive 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 B8C 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 find ASTM A193 B8C Bolts in a variety of applications that demand corrosion resistance and stability under high temperatures. They’re commonly used in heat exchangers, boilers, pressure vessels, and high-temperature piping systems. Additionally, these bolts are essential in chemical processing plants, petrochemical refineries, power generation facilities, and marine settings. They’re perfect for assemblies that face thermal cycling, corrosive media, and sustained loads. Thanks to their resistance to intergranular corrosion and reliable mechanical performance, they’re a smart choice for demanding environments.
At Mazin Fasteners, we prioritize the secure and efficient packaging of ASTM A193 B8C bolts to ensure their safe delivery and optimal condition upon arrival. Each bolt is carefully packed in high-quality, durable containers that protect against damage and contamination. Our packaging includes clear labeling for easy identification and handling. We offer customized packaging solutions to meet specific client needs, ensuring that every order arrives intact and ready for use in demanding industrial applications.
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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