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Mira Fasteners, a reputable manufacturer and supplier located in Kuala Lumpur, Malaysia, specializes in top-notch ASTM A193 B8 Class 2 Bolts designed for high-pressure and high-temperature applications. Crafted from AISI 304 stainless steel that has undergone strain-hardening to boost its mechanical strength, these bolts are essential in critical sectors like oil & gas, chemical processing, power generation, and marine industries. At Mira Fasteners, we ensure our bolts not only meet but often exceed ASTM A193 standards, providing outstanding performance, corrosion resistance, and durability for industrial uses both in Malaysia and around the globe.
ASTM A193 B8 Class 2 Bolts are constructed from strain-hardened AISI 304 stainless steel, which consists of Chromium (18–20%), Nickel (8–11%), and a low carbon content (≤0.08%). These bolts boast impressive mechanical properties, featuring a minimum tensile strength of 125 ksi (860 MPa) and a yield strength of 100 ksi (690 MPa), along with an elongation of 15%. The strain-hardening process not only enhances strength but also maintains corrosion resistance in oxidizing environments. B8 CL2 bolts are particularly well-suited for applications demanding high strength, crevice corrosion resistance, and non-magnetic characteristics.
| 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 are widely used in high-temperature and corrosive environments, such as in the oil and gas, petrochemical, and power generation industries. Their high strength and resistance to oxidation make them suitable for securing critical components in machinery, pressure vessels, and piping systems. Common applications include flanged connections, reactor vessels, and steam pipelines. These bolts ensure reliable performance and durability under extreme conditions, making them essential for safety and efficiency in demanding industrial settings.
We ensure that our ASTM A193 B8 CL2 bolts are packaged with the utmost care to maintain their quality and integrity. Each bolt is individually inspected and then securely packed in durable, corrosion-resistant containers. Our packaging is designed to protect the bolts during transit and storage, preventing any damage or contamination. Whether you need small or large quantities, we offer flexible packaging solutions to meet your specific requirements, ensuring your bolts arrive in perfect condition.
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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