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Brian Fasteners, Houston, USA, is a reliable maker and supplier of high-quality fastening solutions, with expertise in ASTM A193 B8 CL4 bolts. Renowned for precision engineering, tough materials, and strict compliance with global standards, Brian Fasteners supplies industries requiring uncompromising quality and reliability. With customer satisfaction being a top priority, the business provides standard and custom fastener solutions to address a vast array of industrial uses. Their ASTM A193 B8 CL4 bolts are well known for their high corrosion resistance and capability in high stress applications, withstanding extended service and structures remaining intact.
ASTM A193 B8 CL4 bolts consist mainly of austenitic stainless steel, alloy type 304, with added nitrogen for added strength. The bolts are highly resistant to oxidation and corrosion, perfect for use in extreme environments. In terms of mechanics, they have a minimum tensile strength of 125 ksi and yield strength of 100 ksi, providing better durability when subjected to stress. Their strength and elongation properties stay consistent throughout a spectrum of temperatures, which guarantees performance in cryogenic and high-heat conditions. They are the best bolts for demanding industrial and structural applications due to these characteristics.
| 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 |
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 B8 CL4 bolts see widespread application in high-strength and resistance-to-corrosion fasteners used in industries like oil and gas, chemical processing, power generation, and marine environments. Their superior mechanical properties and resistance to severe elements qualify them for use in flanged joints, pressure vessels, heat exchangers, and high-temperature and pressure piping systems. They are also used in offshore platforms, refineries, and petrochemical facilities where structural durability and long life are essential. Their nitrogen-altered composition provides them with superior strength and reliability even under tough and corrosive industrial conditions.
At Brian 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.
Brian Fasteners is a leading manufacturer and supplier of high-quality fasteners in Houston , USA, with over 8 years of experience serving global industries.
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