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Mira Fasteners is a reliable manufacturer and supplier of ASTM A453 Grade 660 Class B Bolts, based in Kuala Lumpur, Malaysia. These robust bolts are specifically crafted for high-temperature and high-strength applications in critical sectors like power generation, petrochemicals, aerospace, and refineries. At Mira Fasteners, every bolt is made to meet international standards, backed by strict quality control and precise manufacturing processes. Renowned for their dependability, prompt delivery, and engineering expertise, Mira Fasteners has become a go-to partner for clients across Malaysia and Southeast Asia who need trustworthy bolting solutions in extreme conditions.
ASTM A453 Grade 660 Class B Bolts are crafted from a precipitation-hardened austenitic stainless steel alloy, primarily consisting of nickel (24–27%), chromium (13–17%), molybdenum (1.5–2.5%), and iron. These bolts undergo heat treatment to achieve a minimum tensile strength of 860 MPa and a yield strength of 550 MPa. Class B bolts are known for their outstanding resistance to oxidation, stress rupture, and creep, even at service temperatures reaching up to 704°C (1300°F). Their strength, stability, and corrosion resistance make them perfect for high-temperature and pressure applications, especially in thermal cycling systems and flanged joints.
Material | Dimensions | Standards | Size | Length |
ASTM A453 GR 660 CLASS B Bolts | ASME B18.2.1, B18.3 | ASTM, ASME | M 02 to M 160 | 3 mm to 200 mm |
|
Element |
Content |
|---|---|
|
Carbon |
0.08 max |
|
Manganese |
2.00 max |
|
Phosphorus, max |
0.040 max |
|
Sulfur, max |
0.030 max |
|
Silicon |
1.00 max |
|
Nickel |
24.0-27.0 |
|
Chromium |
13.5-16.0 |
|
Molybdenum |
1.00-1.50 |
|
Tungsten |
– |
|
Titanium |
1.9-2.35 |
|
Aluminum |
0.35 max |
|
Vanadium |
0.10-0.50 |
|
Boron |
0.001-0.010 |
| Tensile Strength/Ultimate Tensile Stress (UTS) – (Mpa) | 895 min |
| Yield Strength/Proof Stress(0.2% Offset) (YS) – (Mpa) | 585 min |
| Elongation in 4D (El) | 15 |
| Reduction | 18 |
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 A453 Grade 660 Class B Bolts commonly used in boilers, turbines, reactors, heat exchangers, and high-pressure vessel connections. Their impressive mechanical performance under prolonged heat exposure makes them vital for critical bolting assemblies in oil & gas plants, power stations, and industrial processing equipment. These bolts help minimize the risk of failure and extend maintenance intervals, enhancing both safety and operational efficiency. Built to withstand the toughest service conditions, A453 Gr. 660 Class B Bolts deliver long-lasting durability and secure fastening for mission-critical systems.
At Mira Fasteners ASTM A 453 GR 660 Class B Bolts are carefully fastened for quality and protection during movement. Each bolt is securely wrapped with protective coatings to prevent corrosion. They are packaged in sturdy waterproof boxes or boxes labeled for easy identification and handling. Customized packaging is available to meet specific requirements, ensuring a safe and convenient delivery to our customers in Kuala lumpur, the Malaysia, and beyond.
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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