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Punit Fasteners, located in Delhi, India, has built a solid reputation as a reliable manufacturer and supplier of ASTM A453 GR 660 Class B fasteners. These fasteners are designed to deliver top-notch performance in high-temperature and high-stress situations. Crafted from precipitation-hardened austenitic stainless steel, they boast impressive mechanical strength and resistance to oxidation. Punit Fasteners is committed to adhering to ASTM standards and ensuring precision in every product they create. Their fasteners find applications across various industries, including power generation, aerospace, petrochemical, and nuclear sectors, providing dependable solutions that can handle extreme pressure, high temperatures, and corrosive environments.
The ASTM A453 GR 660 Class B fasteners are composed of precipitation-hardened austenitic stainless steel, typically featuring 24–27% nickel, 13–17% chromium, 1.0–1.5% manganese, 1.0–1.5% molybdenum, along with trace amounts of titanium, aluminum, and carbon. These fasteners undergo a process of solution treatment and aging to achieve their remarkable mechanical strength. They offer a minimum tensile strength of 110 ksi (760 MPa) and a yield strength of 85 ksi (585 MPa). Renowned for their excellent resistance to creep and stress rupture, they maintain their dimensional stability and strength even at temperatures soaring up to 704°C, making them perfect for high-temperature applications.
Material | Dimensions | Standards | Size | Length |
ASTM A453 GR 660 CLASS B Fasteners | 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 fasteners commonly used in high-temperature, high-pressure settings where long-lasting performance is essential. They’re particularly suited for steam turbines, nuclear reactors, heat exchangers, and pressure vessels that operate in challenging thermal conditions. In the aerospace and power generation sectors, these fasteners are integral to engine components and turbine casings, thanks to their strength and resistance to creep. Chemical and petrochemical facilities also rely on them for flanged connections and valve assemblies. These fasteners are key to ensuring reliability and safety in applications that demand resistance to thermal fatigue, oxidation, and mechanical stress over extended periods.
At Punit Fasteners, we ensure that ASTM A 453 GR 660 Class B Fasteners are carefully installed to preserve their quality and integrity. Each packaging is individually inspected and carefully packed in sturdy, corrosion-resistant containers to prevent damage during transit. Our packaging is designed to meet international standards, ensuring safe delivery and easy handling. We offer extensive labeling for quick identification and compliance with regulatory requirements, making our packaging as reliable as our packaging.
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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