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The Fasteners Mart in Mumbai, India, is a leading manufacturer and supplier of fasteners based on high-strength fasteners, such as the world-famous ASTM A193 B8 CL2 fasteners. Since we have three decades of experience, we support multiple industries with long-lasting, corrosion-resistant, and precision-fasteners that follow international standards. Our ASTM A193 B8 CL2 fasteners are known worldwide for being extremely strong and reliable, ideal for high-temperature and high-pressure applications. At The Fasteners Mart, we operate towards providing high-quality products and services to meet the special requirements of our customers.
ASTM A193 B8 CL2 fasteners are made of austenitic stainless steel that is essentially 18% chromium and 8% nickel, which makes them high strength and possessing superior resistance to corrosion. These fasteners are designed specifically for application under high temperatures and harsh environments. The mechanical properties of ASTM A193 B8 CL2 include a minimum yield strength of 30,000 psi (205 MPa) and a minimum tensile strength of 75,000 psi (515 MPa). They also possess excellent ductility, toughness, and resistance to stress and are therefore appropriate for usage in high-temperature and high-pressure applications in the petrochemical, gas, and oil industries.
| Element | B7 | B8 CL2 | B8 CL2M |
| 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 CL2 Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL2M Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL2 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 | |
| B8 CL2M Class 2 | Up to 3/4 | 110 | 95 | 15 | 45 |
|
Material |
Specification |
Standards |
Size
|
Length |
|
ASTM A193 B8 CL2 Fasteners
|
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 fasteners are widely used in high-pressure, high-temperature conditions, and therefore are most suitable for applications in industries like oil and gas, petrochemical, power generation, and marine. These fasteners are extremely important in the construction of pressure vessels, heat exchangers, reactors, and boilers, where corrosion, stress, and high-temperature resistance are essential. Their high strength and endurance make them well-suited to retain components under harsh conditions like steam pipes, gas turbines, and chemical processing equipment. Due to their enhanced mechanical properties, ASTM A193 B8 CL2 fasteners ensure long-term safety and reliability in adverse industrial operations
ASTM A193 B8 CL2 fasteners are packaged in the right manner to prevent damage and to be delivered to customers in the best possible condition. They are individually wrapped with protective covers like plastic or anti-corrosion paper to prevent damage during shipping. Under the quality control, testing is thoroughly conducted, including tensile strength, hardness, and corrosion resistance tests, as per ASTM standards. These fasteners are thoroughly inspected to meet rigorous dimensional, mechanical, and material requirements before they are shipped to provide reliability and performance in demanding applications.
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