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MUKAU FASTENERS is a reliable manufacturer and supplier based in Kinshasa, Congo, known for its top-notch ASTM A193 B7 Stud Bolts, designed specifically for tough industrial applications. Crafted from chromium-molybdenum steel, these stud bolts undergo heat treatment to deliver outstanding tensile strength and durability, ensuring they perform reliably even in high-pressure and high-temperature situations. With meticulous manufacturing processes and strict adherence to ASTM standards, MUKAU FASTENERS promises consistency, strength, and long-lasting reliability. You’ll find ASTM A193 B7 Stud Bolts widely utilized in the petrochemical, power generation, and construction sectors, providing secure and durable fastening solutions for essential equipment and structural assemblies.
ASTM A193 B7 Stud Bolts are made from high-strength chromium-molybdenum steel, which typically includes carbon, manganese, chromium, and molybdenum. These bolts are quenched and tempered to reach a tensile strength of 125 ksi (860 MPa) and a yield strength of 105 ksi (725 MPa). They boast excellent hardness, toughness, and fatigue resistance, making them perfect for high-pressure and elevated-temperature environments. Their mechanical properties ensure they perform exceptionally well in bolted connections that face heavy loads, vibrations, and thermal cycling.
Material | Specification | Standards | Size | Length |
ASTM A193 B7 Stud Bolt | IS BS ASTM | DIN, ISO, JIS, GB, IS, BS, ASTM | M 02 to M 160 | 3 mm to 200 mm |
| 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 |
| 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% |
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 B7 Stud Bolts extensively used in pressure vessels, flanges, pipelines, and heat exchangers across the oil and gas, petrochemical, and power generation industries. They provide secure fastening for high-pressure steam lines, boilers, and chemical processing equipment. Thanks to their high tensile strength and thermal resistance, these bolts are ideal for critical mechanical and structural connections where safety, reliability, and durability are crucial. They’re also commonly found in construction and heavy machinery applications, ensuring they deliver long-lasting performance even in tough operating conditions.
At Mukau Fasteners, we prioritize the safe and secure packaging of our ASTM A193 B7 stud bolts. Each bolt is meticulously packed to prevent damage during transit. We use sturdy, corrosion-resistant materials and ensure proper labeling for easy identification. Our packaging solutions include durable wooden crates, pallets, and customized options to meet specific client needs. By adhering to international packaging standards, we guarantee that our stud bolts arrive in perfect condition, ready for immediate use.
Mukau Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kinshasa, Congo, with over 8 years of experience serving global industries.
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