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Yasin Fasteners, based in Istanbul, Turkey, has earned a solid reputation as a reliable manufacturer and supplier of top-notch fastening solutions. Their ASTM A193 B8 CL4 Bolts are crafted to provide outstanding corrosion resistance, impressive tensile strength, and long-lasting durability for essential industrial applications. Made from high-quality austenitic stainless steel (Type 304), these bolts go through a specialized heat treatment process to enhance their mechanical properties. With a commitment to precision engineering, rigorous quality control, and strict adherence to ASTM standards, Yasin Fasteners ensures that their products are exceptionally dependable. These bolts are perfect for high-pressure and high-temperature settings in industries like petrochemical, power generation, marine, and chemical processing.
ASTM A193 B8 CL4 Bolts are constructed from Type 304 stainless steel, which includes 18–20% chromium, 8–11% nickel, and a balanced amount of iron, along with trace elements of carbon, manganese, and silicon. These bolts undergo carbide solution treatment and strain hardening to boost their strength and resistance to corrosion. They typically showcase a minimum tensile strength of 860 MPa, a yield strength of at least 655 MPa, and hardness ranging from 223 to 321 HB. With remarkable ductility, toughness, and oxidation resistance, ASTM A193 B8 CL4 Bolts guarantee reliable performance in challenging high-temperature and corrosive environments.
| 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 find extensive use in chemical plants, petrochemical industries, refineries, power generation facilities, and marine applications, thanks to their strength and resistance to oxidation and corrosion. They are perfect for securing components in boilers, turbines, pressure vessels, flanges, valves, and piping systems that are exposed to high temperatures and harsh environments. Additionally, these bolts are utilized in offshore and marine structures for their long-lasting durability. ASTM A193 B8 CL4 Bolts ensure secure fastening, resist loosening under mechanical stress, and provide peace of mind in demanding applications.
At Yasin Fasteners, ASTM A193 B8 CL4 bolts are meticulously packaged to ensure safe and secure delivery. Each bolt is individually inspected and then packed in high-quality, protective materials to prevent damage during transit. Our packaging includes clear labeling with detailed specifications and batch information, facilitating easy identification and traceability. We offer flexible packaging options to meet customer requirements, ensuring that the bolts arrive in optimal condition for immediate use in your critical applications.
Yasin Fasteners is a leading manufacturer and supplier of high-quality fasteners in Istanbul, Turkey, with over 8 years of experience serving global industries.
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