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Mumbai, India-based Fasteners Mart is a renowned manufacturer and supplier of high-quality fasteners to diverse industries. Specializing in ASTM A193 B7 stud bolts, we provide long-lasting and reliable fastening solutions for mission-critical applications, ensuring superior performance and safety. Our ASTM A193 B7 stud bolts are at international standards and are designed for high-temperature and high-pressure environments. With excellence our motivation, The Fasteners Mart is your trusted ally for quality fasteners that provide enduring solutions in even the most challenging industrial settings.
ASTM A193 B7 stud bolts are made of an alloy steel composition that has chromium (0.30-0.60%) and molybdenum (0.90-1.20%), along with 0.35% carbon. The composition has high strength, toughness, and heat resistance. The mechanical properties of ASTM A193 B7 include tensile strength of 85,000 to 105,000 psi (586-724 MPa) and a yield strength of not less than 60,000 psi (414 MPa). These study bolts possess high temperature strength and high corrosion resistance, and hence find application in harsh conditions like pressure vessels, boilers, and other heavy industry operations.
Material | Specification | Standards | Size | Length |
ASTM A193 B7 Stud Bolt | IS BS ASTM | DIN, ISO, JIS, GB, IS, BS, ASTM | M 02 to M 160 | 3 mm to 200 mm |
| 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 |
| 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% |
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ASTM A193 B7 stud bolts are widely applied in high-temperature and high-pressure services, particularly in petrochemical, oil and gas, power generation, chemical processing, and other sectors. Stud bolts are widely utilized in pressure vessels, heat exchangers, boilers, flanges, and valves, where strength, durability, and resistance to heat and corrosion are critical. Their embracing of unrelenting environments serves to make them a good fit for high-pressure fastener applications where industries require safe, durable connections. ASTM A193 B7 stud bolts play a significant role in keeping equipment and structures safe and secure in high-use industrial environments.
ASTM A193 B7 stud bolts are carefully packed so as to avoid damaging them while they are shipped. Each stud bolt is wrapped separately or fit into durable, corrosion-resistant cases to protect it from damages induced by the environment. All the stud bolts undergo rigorous testing and inspection, including tensile strength, hardness, and dimensional measurement, to attain industry requirements and standards. The tests ensure quality and performance when used in harsh demanding applications but provide the buyers with a reliable and long-lasting fastener.
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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