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The Fasteners Mart, Mumbai, India, is a leading manufacturer and exporter of high-quality fasteners, specializing in ASTM A193 B8 CL5 stud bolts. The stud bolts are developed using high-quality materials, offering excellent strength, corrosion resistance, and durability, and are highly appropriate for use in the petrochemical, oil & gas, power generation, and construction industries. Committed to quality and accuracy, The Fasteners Mart provides on-time reliable fastener solutions to serve the diversified needs of customers across various industrial segments.
ASTM A193 B8 CL5 stud bolts are made of an alloy steel comprising 18% chromium and 8% nickel and are resistant to severe environments and extremely strong. The stud bolts resist high tensile strength from 75,000 to 105,000 psi and the yield strength is approximately about 30,000 psi. The material is also more resistant to oxidation and high temperatures. With a 40% elongation in 8 inches, ASTM A193 B8 CL5 stud bolts offer dependability and are optimally designed for mission-critical use in petrochemical, oil & gas, and power generation applications.
| Element | B8 CL5 | B8 CL5 | B8M CL5 |
| 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 CL5 | 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 CL5 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M CL5 Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL5 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 CL5 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 CL5 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 CL5 stud bolts have extensive use in high-strength, corrosion-resistant industries where environmental conditions are severe. They are appropriate for critical service in petrochemical, oil & gas, power generation, and chemical industries where high pressure and temperature levels are the norm. Typical applications are for bolting pressure vessels, heat exchangers, boilers, turbines, and piping systems. Their higher oxidation and corrosion resistance qualifies them for use under severe environments, including offshore rigs, power plants, and refineries. ASTM A193 B8 CL5 stud bolts provide stable, reliable connections in harsh industrial environments.
ASTM A193 B8 CL5 stud bolts are packaged with utmost care to prevent damage during transit, using materials such as wooden crates, cartons, or shrink wrapping based on order specifications. Each package is clearly labeled for easy identification and traceability. Before dispatch, these stud bolts undergo rigorous testing, including dimensional checks, tensile strength, and corrosion resistance tests, in line with ASTM standards. Non-destructive testing methods ensure the bolts meet quality specifications, ensuring their reliability and performance in demanding industrial applications.
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