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The Fasteners Mart, a reliable Mumbai-based manufacturer and supplier in India, is involved in supplying high-quality fasteners for use in all kinds of industries. We supply ASTM A193 B8 CL3 stud bolts, which are made from top-grade chromium-nickel stainless steel and are renowned for their very higher strength, corrosion resistance, and long-lasting durability under harsh conditions. These stud bolts are used to function in conditions of high pressure and high temperature, and they are best suited for petrochemical, power generation, and chemical processing industries. We are committed to quality and accuracy and provide smooth functioning in all harsh applications.
ASTM A193 B8 CL3 stud bolts are made of austenitic stainless steel with a composition that is primarily 18-20% chromium and 8-12% nickel with controlled carbon, manganese, phosphorus, sulfur, and silicon. The stud bolts are designed to provide high strength and enhanced durability for severe environments. The stud bolts must have at least 125 ksi (860 MPa) tensile strength and 100 ksi (690 MPa) minimum yield strength. With enhanced corrosion, oxidation, and heat stress resistance, ASTM A193 B8 CL3 stud bolts are ideal for high-pressure and high-temperature applications in petrochemical, power, and chemical process industries.
| Element | B7 | B8 | B8M |
| 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 |
| B7 | 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 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M Class 1 | All | 75 | 30 | 30 | 50 |
| B8 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 |
Material | Specification | Standards | Size | Length |
ASTM A193 B8 CL3 StudBolt | 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 CL3 stud bolts are used extensively in high-strength, corrosion-resistant fasteners for high-pressure and high-temperature service. They are utilized in the petrochemical, oil and gas, power generation, and chemical processing industries. These stud bolts perform the vital role of holding parts together in pressure vessels, heat exchangers, flanges, pumps, and valves. Their better resistance to oxidation, corrosion, and thermal fatigue qualifies them for harsh applications, even those under hostile environments. ASTM A193 B8 CL3 stud bolts ensure safety, integrity, and long-term performance of high-reliability systems operating in harsh environments.
At The Fasteners Mart, ASTM A193 B8 CL3 stud bolts are meticulously packaged to ensure optimal protection during transit and storage. Each bolt is individually wrapped in anti-corrosive material and securely placed in durable, custom-sized boxes to prevent damage. The packaging is clearly labeled with product specifications and handling instructions for easy identification. Our commitment to careful packaging helps maintain the integrity and quality of the fasteners, ensuring they arrive in perfect condition and ready for use.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
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