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The Fasteners Mart is a company based in Mumbai, India, which is a leading manufacturer and supplier of premium fasteners to various industries all over the world. We have expertise in ASTM A193 B8 CL2 bolts and deliver them with top performance, durable life, and reliability in all our products. These chromium-nickel steel bolts are resistant to corrosion and ideal for high-temperature applications. With excellence as a guarantee, The Fasteners Mart provides an extensive line of fasteners, catering to industries such as oil and gas, construction, and manufacturing, guaranteeing customer satisfaction in each order.
ASTM A193 B8 CL2 bolts are made of austenitic stainless steel, which in turn is 18-20% chromium and 8-10.5% nickel with small amounts of manganese, silicon, and carbon. This composition provides good resistance to oxidation, corrosion, and high-temperature environments. Mechanical properties include a minimum tensile strength of 70 ksi (485 MPa) and yield strength of 30 ksi (205 MPa), providing them with durability and reliability. These bolts have excellent resistance against stress corrosion cracking and are ideal for application in pressure vessels, piping systems, and elevated temperature conditions.
| 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.
ASTM A193 B8 CL2 bolts have wide usage in high-strength fastener-requiring industries where the bolts need to bear corrosive conditions and extreme temperatures. Primarily used in oil and gas, petrochemical, power plants, and chemical processing sectors, the bolts are applied for use in pressure vessels, heat exchangers, steam turbines, and piping systems. Being highly resistant to oxidation and corrosion, the bolts can be utilized in high-temperature applications such as in boilers, furnaces, and reactors. Also, their high mechanical properties ensure a secure and stable fastening solution for critical applications requiring performance and longevity, e.g., bridge construction as well as industrial equipment.
ASTM A193 B8 CL2 bolts are carefully packaged to ensure safe delivery and transportation. They are normally packaged in wooden crates or cartons, covered to avoid damage when handling. Each bolt is visually examined for any defects, and quality assurance testing such as dimensional testing, tensile strength, and corrosion resistance is conducted to meet the standards of industries. Also, there are test reports and certificates of compliance that ensure the bolts are fulfilling all the requirements for performance and safety in such important application.
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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