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Ramu Fasteners is a trusted manufacturer and supplier located in Hyderabad, specializing in high-quality ASTM A193 B8 CL5 Bolts designed for critical industrial applications. With a wealth of experience in producing stainless steel fasteners, the company prioritizes precision manufacturing, consistent quality, and adherence to international standards. Ramu Fasteners caters to various industries, including petrochemical, chemical processing, power generation, and marine engineering, providing fasteners that boast both high strength and exceptional corrosion resistance. Backed by state-of-the-art production facilities, thorough testing procedures, and prompt delivery, Ramu Fasteners has built a solid reputation for supplying reliable ASTM A193 B8 CL5 Bolts that meet the rigorous demands of projects and operations.
ASTM A193 B8 CL5 Bolts are crafted from austenitic stainless steel, typically comparable to Type 304, featuring around 18–20% chromium and 8–11% nickel, along with low carbon content. Class 5 bolts undergo strain hardening through cold working, resulting in greater strength compared to standard B8 grades. They demonstrate improved tensile and yield strength, good ductility, and outstanding resistance to corrosion and oxidation. These bolts perform reliably at moderately elevated temperatures and maintain stable mechanical properties under sustained loads in corrosive environments.
| Element | B8 CL5 | B8 CL5 | B8M CL5 |
| 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 |
| B8 CL5 | 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 CL5 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M CL5 Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL5 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 CL5 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 CL5 Bolt
| IS BS ASTM | DIN, ISO, JIS, GB, IS, BS, ASTM | M 02 to M 160 | 3 mm to 200 mm |
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ASTM A193 B8 CL5 bolts are crucial in industries requiring high strength and corrosion resistance. They are commonly used in pressure vessels, heat exchangers, and piping systems within the oil and gas, chemical, and power generation sectors. Their ability to perform reliably under extreme temperatures and aggressive environments makes them ideal for steam turbines, reactor vessels, and high-pressure valves. These bolts ensure secure and durable connections in high-stress applications, enhancing overall system safety and efficiency.
ASTM A193 B8 CL5 Bolts are extensively utilized in situations where high strength and corrosion resistance are crucial. They’re commonly found in petrochemical plants, chemical processing units, refineries, and power generation facilities. These bolts are perfect for flanges, valves, pumps, heat exchangers, and pressure-retaining assemblies that operate in corrosive or humid conditions. Thanks to their stainless steel composition, they’re also well-suited for marine, offshore, and coastal applications.
Ramu Fasteners is a leading manufacturer and supplier of high-quality fasteners in Hyderabad, India, with over 8 years of experience serving global industries.
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