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Rinku Fasteners, located in the thriving industrial belt of Kolkata, India, is a trusted producer and supplier of high-quality ASTM A193 B8T Fasteners. Known for precision engineering and reliability, the company manufactures fasteners designed to perform exceptionally well in high-temperature and corrosive environments. ASTM A193 B8T is derived from stabilized stainless steel, offering enhanced durability and resistance to scaling and oxidation. Backed by advanced manufacturing practices and stringent quality control processes, Rinku Fasteners ensures that each B8T fastener meets global standards and delivers long-lasting, dependable performance for critical industrial applications.
ASTM A193 B8T Fasteners are made from stabilized austenitic stainless steel, typically containing chromium, nickel, and titanium for improved resistance to carbide precipitation. This composition provides excellent corrosion resistance, especially in high-temperature service environments. The fasteners offer good tensile and yield strength, stable mechanical performance under heat, and impressive resistance to oxidation and scaling. Titanium stabilization enhances structural integrity, preventing intergranular corrosion and ensuring long-term reliability. These properties make B8T fasteners suitable for demanding applications requiring both mechanical strength and consistent corrosion protection.
| 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 B8T 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 B8T Fasteners are widely used in industries where components must withstand high temperatures, corrosive media, and prolonged service conditions. They are commonly utilized in petrochemical plants, power generation units, chemical processing equipment, and refineries. Their stability under thermal stress makes them ideal for boilers, heat exchangers, superheaters, and pressure vessels. These fasteners are also relied upon in marine environments, food processing systems, and pharmaceutical machinery due to their hygienic and corrosion-resistant nature. In any application where durability, heat resistance, and reliability are essential, ASTM A193 B8T Fasteners deliver dependable performance.
We prioritize quality by conducting rigorous tests, including Hardness Tests, Spectro Analysis, and PMI Testing, on all our materials before dispatch. We provide essential documents such as commercial invoices, packing lists, Certificates of Origin, and Guarantee Letters to ensure client satisfaction. Additionally, we offer Third Party Inspection Certificates to affirm our commitment to delivering top-tier products. Our comprehensive approach underscores our dedication to maintaining the highest standards and ensuring the reliability of our fasteners.
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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