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Rinku Fasteners, a leading manufacturer and supplier in Kolkata, India, offers high-quality ASTM A193 B8T Boltsdesigned for demanding industrial applications where strength, durability, and corrosion resistance are critical. Made from austenitic stainless steel, these bolts are solution-treated and lightly cold-worked to enhance mechanical performance. Ideal for high-pressure, high-temperature, and chemically aggressive environments, they are widely used in petrochemical plants, refineries, power generation facilities, and marine applications. With strict quality control and precision manufacturing, ASTM A193 B8T Bolts provide reliable, long-lasting fastening solutions, ensuring safe and efficient operation in critical industrial systems.
ASTM A193 B8T Bolts are made from austenitic stainless steel, typically Grade 304 or 316, with chromium and nickel for superior corrosion and oxidation resistance. The T designation indicates solution treatment and light cold working, giving these bolts enhanced tensile and proof strength while retaining ductility. They exhibit excellent hardness, toughness, and resistance to stress corrosion cracking. These bolts maintain mechanical integrity under high temperatures, cyclic loading, and corrosive environments, making them ideal for critical industrial applications where reliable and high-performance fasteners are required for secure and durable assemblies.
| 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 Bolts
| 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 Bolts are widely used in industries that demand corrosion-resistant, high-strength fastening solutions. They are commonly applied in high-pressure piping systems, flanged joints, boilers, heat exchangers, pressure vessels, and valve assemblies in petrochemical, chemical processing, and power generation industries. Their solution-treated, strain-hardened structure ensures durability in marine, offshore, and chemically aggressive environments. These bolts are also suitable for food, pharmaceutical, and water treatment equipment due to their hygienic, non-reactive properties. ASTM A193 B8T Bolts provide secure, long-lasting fastening, ensuring safe and reliable operation in high-stress and high-temperature industrial applications.
We uphold stringent quality standards for our ASTM A193 B8T Bolts, subjecting them to rigorous tests such as Hardness Test, Chemical Analysis via Spectro Analysis, PMI Testing, Flattening Test, Micro and Macro Tests, Pitting Resistance Test, Flaring Test, Intergranular Corrosion (IGC) Test. Each order includes a commercial invoice, packaging list, Certificate of Origin, and Guarantee Letter. For added assurance, we offer third-party inspection certificates to validate the excellence and suitability of our bolts for various applications, ensuring client satisfaction.
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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