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Punit Fasteners stands out as a top-notch manufacturer and supplier of ASTM A193 B8 Class 2 Bolts, proudly based in Delhi, India. Renowned for our precision-engineered fastening solutions, we produce high-quality bolts that adhere to strict industrial standards for strength and corrosion resistance. ASTM A193 B8 CL2 Bolts are perfect for high-temperature and high-pressure applications, making them a go-to choice in the petrochemical, power generation, and process industries. With a strong focus on quality, durability, and customer satisfaction, we offer a diverse range of bolt sizes and finishes, catering to clients across India and beyond, all while ensuring timely delivery and competitive pricing.
Our ASTM A193 B8 Class 2 Bolts are crafted from AISI 304 stainless steel, which undergoes carbide solution treatment and strain hardening. This process enhances their mechanical strength compared to Class 1 bolts. These bolts boast a minimum tensile strength of 125 ksi (860 MPa) and a minimum yield strength of 100 ksi (690 MPa). They excel in corrosion resistance, ductility, and toughness, even in high-temperature settings. Their non-magnetic properties and resistance to oxidation and chemical attacks make them ideal for challenging and corrosive environments.
| 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 B8 CL2 Hex 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.
You’ll find ASTM A193 B8 CL2 Bolts widely used in pressure vessels, heat exchangers, flanges, valves, and piping systems that operate under high temperature and pressure. Industries such as petrochemical, chemical processing, oil and gas, marine, and power generation depend on these bolts for critical joints and structural connections. Their exceptional strength and corrosion resistance make them perfect for both onshore and offshore applications. Additionally, they are commonly utilized in refineries, thermal plants, and process equipment, where long-term durability and reliability are crucial for safety and operational efficiency.
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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