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At Rinku Fasteners, we take pride in delivering dependable fastening solutions designed to perform in diverse industrial environments. As a leading manufacturer and supplier in Kolkata, India, we offer high-quality ASTM A193 B8 Fasteners, crafted to meet stringent international standards. Known for their corrosion resistance, durability, and consistent performance, these stainless steel fasteners are trusted by industries ranging from petrochemical and power generation to food processing and pharmaceuticals. With a commitment to precision engineering and customer-focused service, we ensure our clients receive fasteners that not only meet expectations but also enhance overall operational reliability.
ASTM A193 B8 Fasteners are produced from austenitic stainless steel, typically Grade 304, containing chromium and nickel for excellent corrosion and oxidation resistance. They undergo carbide-solution treatment to restore corrosion-resistant properties while ensuring reliable strength. These fasteners provide good tensile and yield strength, stable hardness, and strong ductility, allowing them to perform effectively in high-temperature and chemically aggressive environments. Their resistance to stress corrosion cracking and ability to maintain mechanical integrity under thermal fluctuations make them ideal for demanding industrial applications requiring durability and long-term performance.
| 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 are widely used across industries where corrosion resistance, hygiene, and mechanical reliability are essential. They are commonly installed in chemical processing plants, power generation units, and petroleum refineries due to their ability to withstand corrosive chemicals and elevated temperatures. Food and beverage industries rely on them for sanitary equipment, while water treatment and pharmaceutical sectors prefer them for their clean surface properties. These fasteners are also essential in heat exchangers, pressure vessels, structural assemblies, and marine applications. Their versatility and durability make them suitable for both standard and critical industrial operations.
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 Rinku Fasteners for a reliable and quality fastening solution for all your fastening needs.
Rinku Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kolkata, India, with over 8 years of experience serving global industries.
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