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Mira Fasteners, based in Kuala Lumpur, Malaysia, stands out as a leading manufacturer and supplier of top-quality ASTM A193 B8T Stud Bolts, specifically crafted for high-temperature and high-pressure applications. These stud bolts are constructed from Type 321 stainless steel, a titanium-stabilized austenitic alloy known for its remarkable resistance to intergranular corrosion post-welding. They’re perfect for industries like oil & gas, chemical processing, and power generation. At Mira Fasteners, every B8T stud bolt is produced in line with ASTM A193 standards, ensuring they meet both local and international engineering requirements for reliability, safety, and performance.
ASTM A193 B8T Stud Bolts are crafted from AISI 321 stainless steel, which is stabilized with Titanium (Ti) to avoid carbide precipitation during the welding process. The typical chemical makeup features Chromium (17–19%), Nickel (9–12%), Titanium (≥5x C%), and a low carbon content. These stud bolts boast a minimum tensile strength of 75 ksi (515 MPa), yield strength of 30 ksi (205 MPa), and an elongation of 30%. Their stabilization helps them retain strength and resist corrosion even at high temperatures, particularly in oxidizing environments, making them ideal for pressure vessel and flange connections.
| 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 | |
| B8M 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 B8T Stud Bolts
| IS BS ASTM | DIN, ISO, JIS, GB, IS, BS, ASTM | M 02 to M 160 | 3 mm to 200 mm |
To satisfy our clients needs by providing high quality products at competitive price as per the schedule and to maintain long term relationship with our clients.
ASTM A193 B8T stud bolts are made from stainless steel with excellent resistance to high temperatures and corrosion. They are primarily used in high-stress applications such as oil and gas, petrochemical plants, and power generation facilities. Their resistance to oxidation and creep makes them ideal for use in environments where temperatures can exceed 1000°F (537°C). Common applications include securing flanges, piping systems, and equipment where durability and reliability under extreme conditions are critical.
We guarantee complete customer satisfaction by providing thorough documentation with our ASTM A193 B8T Stud Bolts. Our comprehensive package includes a commercial invoice, packaging list, fumigation certificate, heat treatment chart, and a NABL-approved lab test report. Additionally, we offer MTC certificates as per EN 10204/3.1b, PMI Test Certificates, 100% radiography test reports, and Third Party Inspection Certificates, ensuring the highest product quality and integrity standards.
Mira Fasteners is a leading manufacturer and supplier of high-quality fasteners in Kuala lumpur, Malaysia, with over 8 years of experience serving global industries.
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