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Poang Fasteners, a well-respected manufacturer and supplier based in Da Nang, Vietnam, specializes in providing high-performance ASTM A193 B8 CL4 Stud Bolts for industries that demand reliability in tough conditions. Thanks to their cutting-edge production methods and rigorous quality control, the company guarantees bolts that adhere to international standards. These ASTM A193 B8 CL4 Stud Bolts are known for their exceptional strength, resistance to corrosion, and long-lasting durability, making them perfect for challenging environments. Poang Fasteners serves crucial sectors such as oil & gas, petrochemicals, marine, and power generation, delivering fastener solutions that blend durability, precision, and consistent performance.
Crafted from austenitic stainless steel, specifically Type 304 with carbide solution treatment for improved properties, ASTM A193 B8 CL4 Stud Bolts boast a composition that includes chromium (18–20%), nickel (8–11%), manganese, silicon, and controlled carbon. Mechanically, these bolts showcase impressive tensile strength around 860 MPa, yield strength of about 665 MPa, and good elongation for ductility. They offer outstanding resistance to oxidation, pitting, and stress corrosion cracking. Built to withstand high temperatures and aggressive chemical environments, these stud bolts provide reliable strength, toughness, and dependability in high-stress industrial settings.
| Element | B8 CL3 | B8 CL3 | B8M CL3 |
| 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 CL3 | 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 CL3 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M CL3 Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL3 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 CL3 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 Stud 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 stud bolts are widely used in high-pressure and high-temperature environments, such as in the oil and gas, petrochemical, and power generation industries. They are essential for securing flanges, valves, and other critical components in reactors, turbines, and pipelines. Their superior strength and corrosion resistance make them suitable for demanding applications where reliability and durability are crucial. These stud bolts ensure the integrity and performance of machinery and infrastructure under extreme conditions.
You’ll find ASTM A193 B8 CL4 Stud Bolts commonly used in flanged connections, valves, pumps, heat exchangers, pressure vessels, and pipeline systems. In the oil & gas industry, they are essential for refineries and offshore platforms where exposure to corrosive and high-temperature conditions is the norm. Power generation facilities utilize them in boilers, turbines, and critical assemblies. The petrochemical and marine sectors favor these bolts for their ability to resist chloride-induced corrosion and endure harsh environments. Their versatility, high strength, and excellent corrosion resistance make them vital for safe and efficient industrial operations.
Poang Fasteners is a leading manufacturer and supplier of high-quality fasteners in Da Nang, Vietnam, with over 8 years of experience serving global industries.
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