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Mira Fasteners is a trusted manufacturer and supplier of ASTM A193 B8 Class 3 Bolts, based in Kuala Lumpur, Malaysia. These robust stainless steel bolts are crafted for critical bolting applications that demand both corrosion resistance and superior mechanical performance. Catering to sectors like oil & gas, chemical processing, power generation, and marine engineering, Mira Fasteners guarantees that each bolt adheres to stringent international standards. With a solid reputation for precision manufacturing, timely delivery, and technical know-how, Mira Fasteners has established itself as a reliable partner for quality fastening solutions throughout Malaysia and Southeast Asia.
The ASTM A193 B8 Class 3 Bolts are made from AISI 304 stainless steel, which has been strain-hardened to significantly enhance its mechanical properties. These bolts boast a minimum tensile strength of 760 MPa and a yield strength of 600 MPa, making them ideal for high-pressure and high-stress situations. They maintain excellent corrosion resistance across a variety of environments, including mildly acidic and chloride-rich conditions. The strain-hardening process also boosts fatigue resistance and minimizes deformation under load, ensuring long-lasting performance and structural integrity in demanding settings.
| Element | B8 CL3 | B8 CL3 | B8M CL3 |
| 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 |
| B8 CL3 | 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 CL3 Class 1 | All | 75 | 30 | 30 | 50 |
| B8M CL3 Class 1 | All | 75 | 30 | 30 | 50 |
| B8 CL3 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 CL3 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 CL3 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 often find ASTM A193 B8 Class 3 Bolts in pressure vessels, heat exchangers, flanged joints, valves, and high-pressure piping systems. In industries like petrochemical, power, and water treatment, these bolts are prized for their ability to endure both mechanical and environmental stress. Their superior strength compared to standard Class 1 bolts allows for more compact and efficient bolted joints without sacrificing safety or performance. Whether in corrosive industrial environments or structural assemblies that require high durability, B8 Class 3 Bolts deliver a dependable fastening solution for critical applications.
At Mira Fasteners, we ensure that our ASTM A193 B8 CL3 bolts are meticulously packaged to maintain their integrity and quality during transit. Each bolt is carefully inspected and packed in sturdy, corrosion-resistant materials to prevent damage. Our packaging solutions include custom labeling and secure sealing, guaranteeing safe delivery and easy identification. Whether shipped locally or internationally, our packaging standards meet all regulatory requirements, ensuring our bolts arrive in perfect condition, ready for immediate use in your projects.
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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