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Punit Fasteners, a leading manufacturer and supplier in Delhi, India, proudly offers ASTM A193 B8 CL4 stud bolts. Renowned for their superior tensile strength and resistance to high temperatures and corrosion, these stud bolts are essential for critical industrial applications. Ideal for use in the oil and gas, petrochemical, and power generation sectors, they ensure exceptional reliability and durability. Trust Punit Fasteners for premium-quality stud bolts tailored to meet your demanding operational needs.
Punit Fasteners is a top producer and supplier of ASTM A193 B8 CL4 Stud Bolts, providing high-performance, corrosion-resistant fasteners to industries in Delhi and throughout India. The AISI 304 stainless steel used to make these stud bolts has undergone special treatment to satisfy Class 4 requirements, which include solution annealing and strain hardening for enhanced mechanical strength. They are perfect for use in the chemical, oil and gas, and power generation industries because they are designed for applications that involve high temperatures and corrosive environments. Depending on the needs of the customer, Punit Fasteners provides these bolts in a range of lengths, thread types, and finishes.
| 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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The AISI 304 stainless steel used to make ASTM A193 B8 CL4 Stud Bolts has a chemical composition of 18–20% chromium, 8–12% nickel, and a balance of iron, with trace amounts of manganese, silicon, phosphorus, sulphur, and carbon. To increase strength, these bolts go through strain hardening and solution annealing. A minimum elongation of 14%, a yield strength of about 800 MPa, and a tensile strength of about 1000 MPa are typical mechanical characteristics. These bolts are ideal for harsh service environments due to their improved mechanical and corrosion resistance.
Stud bolts made to ASTM A193 B8 CL4 are utilised in many high-performance applications where corrosion resistance and exceptional strength are essential. In sectors like oil and gas, petrochemicals, power generation, and pharmaceutical processing, common uses include heat exchangers, pressure vessels, valve assemblies, chemical reactors, boilers, and pipeline flanges. They are perfect for high-pressure and high-temperature systems because of their capacity to function under thermal stress and corrosive exposure. In order to satisfy particular project requirements and guarantee long-term dependability in demanding service environments, Punit Fasteners offers these stud bolts in a variety of dimensions and coatings.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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