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Punit Fasteners, based in Delhi, India, stands out as a top manufacturer and supplier of ASTM A453 GR 660 Class B bolts, designed for peak performance in high-temperature and high-stress situations. These bolts are made from precipitation-hardened austenitic stainless steel, which provides remarkable strength, thermal stability, and oxidation resistance. With a commitment to precision and adherence to international quality standards, Punit Fasteners caters to vital industries like power generation, aerospace, petrochemical, and energy. By prioritizing reliability and durability, the company offers fastening solutions that guarantee safety and long-lasting performance, even in the toughest industrial and thermal conditions.
ASTM A453 GR 660 Class B bolts are crafted from austenitic stainless steel, featuring around 24–27% nickel, 13–17% chromium, 1.0–1.5% molybdenum, along with trace elements of aluminum, titanium, and manganese. These bolts undergo solution heat treatment and aging to boost their mechanical strength. They typically provide a minimum tensile strength of 110 ksi (760 MPa) and a yield strength of 85 ksi (585 MPa). Renowned for their outstanding resistance to stress rupture, creep, and oxidation, these bolts maintain their stability and strength even at continuous service temperatures reaching up to 704°C.
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 GR 660 Class B bolts commonly used in high-temperature and high-pressure settings where mechanical reliability is crucial. In the power generation sector, they’re found in turbine casings, boilers, and heat exchangers. The aerospace industry uses them in jet engine assemblies and structural components that face thermal cycling. In petrochemical and refinery operations, these bolts are essential for flanged joints, pressure vessels, and reactors. Their strength and resistance to thermal fatigue make them perfect for nuclear, marine, and other critical applications that demand durable, high-strength fasteners in extreme operating conditions.
At Punit 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 Delhi, the India, and beyond.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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