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Brian Fasteners, a Houston-based USA company, is a renowned manufacturer and supplier of high-grade ASTM A193 B7 bolts. Strongly emphasizing precision engineering and reliability, the company provides top-of-the-line fastening solutions for critical industrial applications. Brian Fasteners is renowned for its dedication to international standards and customer satisfaction and is engaged with clients in the oil & gas, petrochemical, power generation, and construction industries. Their ASTM A193 B7 bolts are manufactured from high-quality raw materials and are strictly quality-checked to ensure durability and performance even in harsh temperatures and pressures.
ASTM A193 B7 bolts are constructed from chromium-molybdenum alloy steel, with good strength and corrosion resistance. Chemically, they consist of elements such as carbon (0.37–0.49%), manganese (0.65–1.10%), and chromium (0.75–1.20%). These bolts are subjected to quenching and tempering treatments to improve mechanical properties. They normally have a minimum tensile strength of 125 ksi, yield strength of 105 ksi, and hardness of 235 to 321 HBW. Their high-temperature resistance and mechanical properties make them ideal for application in severe and demanding conditions where reliability matters.
Material | Specification | Standards | Size | Length |
ASTM A193 B7 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.
ASTM A193 B7 bolts are used extensively in fields that demand high tensile strength and resistance to harsh conditions. Widely used in pressure vessels, power plants, chemical processing plants, and oil refineries, these bolts play a crucial role in sustaining structural integrity against high stress. They are best suited for flange connections, heat exchangers, reactors, and valves due to their potential for resisting high pressures and temperatures. Also, they are employed in heavy machinery, pipeline networks, and industrial equipment where safety and reliability are the utmost concern, providing consistent performance in both static and dynamic loads.
Introducing Brian Fasteners’ ASTM A193 B7 Bolts, engineered for superior strength and durability. These high-performance bolts are crafted from high-alloy steel, ideal for demanding applications in extreme temperatures and high-pressure environments. Each bolt meets stringent ASTM standards, ensuring exceptional reliability and safety. Packaged securely to prevent damage, our fasteners come with clear labeling for easy identification. Trust Brian Fasteners for unmatched quality and performance in every project.
Brian Fasteners is a leading manufacturer and supplier of high-quality fasteners in Houston , USA, with over 8 years of experience serving global industries.
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