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Mazin Fasteners, located in Muscat, Oman, has earned a solid reputation as a reliable manufacturer and supplier of top-notch industrial fasteners, including ASTM A193 B7 bolts. These bolts are crafted to adhere to strict international standards, guaranteeing precision, strength, and dependable performance in tough industrial settings. You’ll find ASTM A193 B7 bolts commonly used in sectors like oil and gas, petrochemicals, power generation, and heavy engineering, where high tensile strength and durability are a must. Thanks to their advanced manufacturing techniques and rigorous quality control, Mazin Fasteners delivers bolts that provide secure, long-lasting, and safe fastening solutions for critical assemblies.
Made from medium-carbon alloy steel, ASTM A193 B7 bolts undergo a quenching and tempering process to achieve impressive tensile strength, hardness, and toughness. They boast excellent mechanical properties, including resistance to wear, fatigue, and high-pressure conditions. Their robust nature makes them perfect for high-temperature and high-pressure applications, such as pressure vessels, pipelines, flanges, and structural assemblies.
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 widely used in high-stress environments such as oil and gas pipelines, power plants, and petrochemical facilities. Their high tensile strength and resistance to extreme temperatures make them ideal for securing flanges, valves, and heavy machinery. They are also employed in construction projects and structural assemblies where reliability and durability are crucial. Designed to handle severe conditions, these bolts ensure stability and safety in demanding industrial and infrastructure applications.
You’ll often find ASTM A193 B7 bolts in chemical plants, refineries, power stations, and other heavy industrial settings. They’re particularly suited for securing flanged connections, pressure equipment, and essential machinery where safety and reliability are crucial. With their outstanding mechanical performance and long service life, ASTM A193 B7 bolts are the go-to choice for engineers and contractors looking for trustworthy fastening solutions in demanding industrial environments.
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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