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Ramu Fasteners stands out as a top-notch manufacturer and supplier of ASTM A193 B8 CL4 Bolts right in the heart of Hyderabad. They specialize in delivering high-performance fastening solutions tailored for tough environments, including corrosive and high-temperature settings. Thanks to their state-of-the-art manufacturing facilities and rigorous quality control measures, Ramu Fasteners guarantees precise dimensions, outstanding mechanical performance, and adherence to international standards. These bolts are crafted for exceptional corrosion resistance, strength, and long-lasting durability. Available in a variety of sizes, thread types, and finishes, they find their place in industries like chemical, petrochemical, power generation, and marine, where reliability, safety, and longevity are crucial.
ASTM A193 B8 CL4 Bolts are crafted from austenitic stainless steel, which is comparable to Type 316 stainless steel. This alloy is enriched with chromium, nickel, and molybdenum, which significantly boosts its resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in environments rich in chlorides and high temperatures. B8 CL4 bolts are known for their impressive tensile and yield strength, along with excellent ductility and toughness. They maintain their mechanical stability even under high-temperature conditions and aggressive chemical exposure, ensuring dependable performance in demanding industrial settings.
| Element | B8 CL4 | B8 CL4 | B8M CL4 |
| 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 CL4 | 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 CL4 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M CL34Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL4 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 CL4 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 CL4 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 CL4 bolts are used in demanding environments such as petrochemical plants, power generation, and high-pressure vessels. They are ideal for applications requiring high strength and resistance to high temperatures and corrosive conditions. Commonly found in flanged joints, pressure vessels, and heavy machinery, these bolts provide reliability and durability in critical industrial settings. Their robust properties make them suitable for both maintenance and new installations in challenging operational environments.
When it comes to applications, ASTM A193 B8 CL4 Bolts are a go-to choice in industries that demand both corrosion resistance and high mechanical strength. You’ll find them in pressure vessels, heat exchangers, piping systems, flanges, pumps, and valves. They play a vital role in chemical processing, petrochemical refineries, power plants, offshore installations, and marine environments. Their ability to resist chloride-induced corrosion and perform well at high temperatures makes them perfect for critical fastening tasks in welded or bolted assemblies. B8 CL4 bolts provide secure connections, ensuring everything stays tightly in place.
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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