Home > ASTM A193 B8 Stud Bolts
Majid Fasteners is a well-respected manufacturer and supplier based in Dubai, UAE, known for crafting top-notch ASTM A193 B8 Stud Bolts that are designed to meet the rigorous demands of industrial applications. Made from high-quality stainless steel Grade 304, these stud bolts boast outstanding corrosion resistance, durability, and performance even in high-temperature environments. Majid Fasteners is committed to adhering to ASTM standards, ensuring their products are perfect for use in refineries, petrochemical plants, power generation facilities, and marine settings. Their B8 Stud Bolts are reliable for fastening flanges, valves, and pressure equipment, making them an excellent choice for critical operations where reliability, precision, and longevity are a must.
ASTM A193 B8 Stud Bolts are crafted from stainless steel Grade 304, which includes chromium (18–20%), nickel (8–11%), along with carbon, manganese, silicon, and a few trace alloying elements. This unique blend provides outstanding corrosion resistance, solid tensile strength, and reliable mechanical performance even at high temperatures. Thanks to their austenitic structure, these bolts boast impressive ductility, toughness, and resistance to stress corrosion cracking. They hold up well in both oxidizing and mildly corrosive environments, making them ideal for high-pressure and high-temperature applications.
| 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 Fasteners | IS BS ASTM | DIN, ISO, JIS, GB, IS, BS, ASTM | M 02 to M 160 | 3 mm to 200 mm |
ASTM A193 B8 Stud Bolts are widely utilized in industries that demand secure, corrosion-resistant, and high-temperature fastening solutions. You’ll find them in petrochemical plants, oil and gas facilities, refineries, and chemical processing units, where they’re used for flanges, valves, heat exchangers, boilers, and pressure vessels. Power plants also rely on these bolts for high-temperature piping, turbine systems, and steam lines. Their rust-resistant qualities make them perfect for marine environments, water treatment facilities, and food processing equipment. Additionally, industrial machinery, pharmaceutical systems, and stainless steel assemblies depend on B8 Stud Bolts for consistent and durable performance in tough operating conditions.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
