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Hamad Fasteners, located in Riyadh, Saudi Arabia, stands out as a top manufacturer and supplier of industrial fasteners that cater to the demanding needs of global industries. With a strong emphasis on quality, precision, and durability, this company provides fastening solutions that are trusted across various sectors, including petrochemical, oil and gas, marine, and power generation. One of their standout products, the ASTM A193 B8 CL4 Bolts, is well-known for its remarkable corrosion resistance, strength, and reliability in high-temperature and high-pressure situations, making them perfect for critical engineering tasks.
These ASTM A193 B8 CL4 Bolts are crafted from austenitic stainless steel, usually Type 304, and are subjected to Class 4 strain hardening to enhance their mechanical properties. Thanks to their chromium and nickel content, they boast excellent resistance to oxidation, scaling, and general corrosion. With a tensile strength of up to 125 ksi (860 MPa) and a yield strength of around 100 ksi (690 MPa), these bolts are built to last, offering durability and toughness even in the most extreme operating conditions.
| 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.
You’ll find ASTM A193 B8 CL4 Bolts widely used in industries like chemical processing, refineries, power plants, and marine engineering. They are particularly suited for applications in boilers, heat exchangers, pressure vessels, turbines, and flanges, where strength and corrosion resistance are essential. Additionally, these bolts are utilized in offshore structures and construction projects that require secure fastening solutions in harsh environments. Their proven track record in both corrosive and high-temperature settings makes them a dependable choice for industries that prioritize safety, stability, and durability in their fastening applications.
Hamad Fasteners is one of the Industrial suppliers and manufacturers of quality fasteners in Riyadh, Saudi Arabia, that has spent more than 12 years serving various industries.
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