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Lina Fasteners is a reliable manufacturer and supplier of ASTM A193 B8 Fasteners, proudly based in Tunis, Tunisia. We cater to a variety of global industries with our precision-engineered products. With a robust manufacturing setup and rigorous quality control measures, we ensure that our fasteners meet ASTM and ASME standards. Our offerings include bolts, studs, nuts, and threaded components, all designed to withstand high temperatures and pressures. Serving sectors like oil and gas, petrochemical, power generation, marine, and construction, Lina Fasteners is known for its unwavering quality, material traceability, competitive pricing, and prompt delivery of ASTM A193 B8 fasteners for critical industrial applications around the world.
ASTM A193 B8 Fasteners are crafted from austenitic stainless steel, typically comparable to Type 304. Their composition features chromium and nickel, which grant them outstanding corrosion resistance and protection against oxidation. These fasteners boast impressive tensile strength, high ductility, and toughness across a broad temperature spectrum. Mechanically, ASTM A193 B8 fasteners are dependable in both high-temperature and cryogenic environments, resisting scaling and stress corrosion cracking. They maintain consistent mechanical properties during thermal cycling and offer reliable load-bearing capacity in pressure-containing assemblies and corrosive settings.
| 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
|
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 B8 Fasteners find extensive use in high-temperature and corrosive service applications. Common applications include bolting for pressure vessels, flanges, valves, and piping systems in oil and gas refineries and petrochemical facilities. They are also frequently utilized in power generation equipment, heat exchangers, boilers, and marine installations. Thanks to their exceptional corrosion resistance and hygienic properties, they are well-suited for chemical processing and other demanding environments.
We ensure that our ASTM A193 B8 fasteners are installed with the utmost care to maintain quality and integrity. Each binder is thoroughly inspected and packed to prevent damage during transport. We use durable, weather-resistant materials for packaging, ensuring safe delivery. Our packaging is designed for easy handling and storage while adhering to industry standards. Count on Lina Fasteners for a reliable and quality fastening solution for all your fastening needs.
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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