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Punit Fasteners, based in Delhi, India, is a trusted name in the manufacturing and supply of ASTM A193 B8C Stud Bolts, crafted to meet the rigorous demands of critical industrial applications. These stud bolts are made from austenitic stainless steel Grade B8C, which provides outstanding corrosion resistance, particularly in high-temperature and chemically harsh environments. We adhere to strict ASTM standards during production, ensuring that our bolts are consistent in strength, precise in dimensions, and durable. Punit Fasteners caters to various industries, including petrochemical, oil & gas, power generation, and marine, offering a diverse range of sizes, thread forms, and finishes, all with prompt delivery and competitive pricing.
ASTM A193 B8C Stud Bolts are constructed from Type 347 stainless steel, a stabilized austenitic alloy that includes chromium (17–20%), nickel (9–13%), and columbium (niobium), which boosts resistance to intergranular corrosion. These bolts excel in high temperatures and corrosive settings. They boast a minimum tensile strength of 515 MPa and a yield strength of 205 MPa, along with impressive elongation and ductility. Heat-treated for enhanced performance, B8C stud bolts retain their structural integrity under stress and thermal cycling, making them perfect for high-pressure, high-temperature bolting in flanged joints and equipment assemblies.
| 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% |
| Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa) | 515 |
| Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa) | 205 |
| Elongation in 4D (El) | 30 |
| Reduction | 50 |
| Hardness – (BHN) | 0 |
|
Material |
Specification |
Standards |
Size
|
Length |
|
ASTM A193 B8C Stud Bolt
|
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 B8C Stud Bolts find extensive use in scenarios that demand both corrosion resistance and high-temperature strength. They’re commonly utilized in the oil & gas sector, pressure vessels, heat exchangers, nuclear facilities, refinery systems, and chemical processing equipment. These stud bolts are particularly suited for bolted flange connections in pipelines, reactors, and boilers, where they face both mechanical stress and exposure to aggressive chemicals. Punit Fasteners offers B8C stud bolts with either full or partial threading, ensuring you get exactly what you need for your project.
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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