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Lina Fasteners is a trusted manufacturer and supplier located in Tunis, Tunisia, specializing in top-notch ASTM A193 B7 Nuts that are perfect for high-pressure and high-temperature applications. These nuts are crafted in line with ASTM standards, using alloy steel and a controlled heat treatment process to ensure they boast exceptional strength and durability. With a commitment to quality, Lina Fasteners implements rigorous quality control measures to guarantee precise dimensions, accurate threading, and consistent mechanical performance. Their products are widely used in the oil & gas, petrochemical, power generation, and heavy engineering sectors, providing reliable fastening solutions, timely delivery, and a long service life for critical industrial needs.
Composition & Mechanical Properties – ASTM A193 B7 Nuts (90 words) ASTM A193 B7 Nuts are made from chromium-molybdenum alloy steel and undergo a quenching and tempering process to achieve impressive strength. They deliver high tensile and yield strength, along with good toughness and resistance to creep at elevated temperatures. These nuts maintain their mechanical stability even under high pressure and thermal stress, ensuring reliable load-bearing capabilities. Additionally, ASTM A193 B7 Nuts demonstrate excellent fatigue resistance and dimensional stability, making them well-suited for demanding service conditions.
Material | Specification | Standards | Size | Length |
ASTM A193 B7 Nuts | 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 Nuts find extensive use in high-pressure and high-temperature settings. They are commonly utilized in flanged joints, pressure vessels, valves, boilers, and heat exchangers. These nuts are heavily relied upon in oil refineries, petrochemical plants, power generation facilities, and heavy industrial machinery. Their remarkable strength and thermal stability make them ideal for steam service, piping systems, and structural connections that face extreme operating conditions. With these nuts, you can count on secure fastening, safety, and long-lasting reliability in critical industrial environments.
Lina Fasteners ensures the secure packaging of ASTM A193 B7 Nuts for optimal protection and easy handling. Each nut is individually packed to prevent damage during transit and storage, with clear labeling for quick identification. Our packaging is designed to maintain the integrity of the nuts and facilitate efficient inventory management. Trust Lina Fasteners for meticulously packaged components, ensuring that your ASTM A193 B7 Nuts arrive in perfect condition, ready for reliable performance in your projects.
Lina Fasteners is a leading manufacturer and supplier of high-quality fasteners in Tunis, Tunisia, with over 8 years of experience serving global industries.
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