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Punit Fasteners, a reputable manufacturer and supplier located in Delhi, India, provides an extensive selection of ASTM A453 GR 660 Class D fasteners, specifically crafted for high-temperature and high-stress environments. These fasteners are made from precipitation-hardened austenitic stainless steel, designed to offer exceptional strength, oxidation resistance, and thermal stability. Punit Fasteners is committed to adhering strictly to ASTM specifications, ensuring that their products meet the rigorous demands of industries such as power generation, petrochemical, and aerospace. With a strong emphasis on precision, performance, and reliability, the company delivers fastening solutions that thrive in the most challenging and extreme industrial applications.
The ASTM A453 GR 660 Class D fasteners are composed of precipitation-hardened austenitic stainless steel, typically featuring 24–27% nickel, 13–17% chromium, 1–1.5% molybdenum, along with trace amounts of manganese, titanium, and aluminum. These components work together to provide remarkable mechanical strength and stability at high temperatures. The fasteners undergo a solution treatment and aging process to achieve impressive tensile strength of around 125 ksi (860 MPa) and yield strength of 105 ksi (725 MPa). They also boast excellent resistance to creep, stress rupture, and oxidation at temperatures up to 704°C, making them perfect for extreme service conditions.
Material | Dimensions | Standards | Size | Length |
ASTM A453 GR 660 CLASS D 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.
ASTM A453 GR 660 Class D fasteners are essential in critical applications that demand outstanding mechanical performance under high temperatures and pressures. They are commonly found in the power generation sector, used in turbines, boilers, and exhaust systems due to their strength and heat resistance. In aerospace, these fasteners are utilized in jet engines and structural assemblies that experience thermal cycling. Additionally, petrochemical and chemical plants rely on them for reactors, flanges, and valve components. Their ability to withstand creep, thermal fatigue, and oxidation ensures dependable operation in the most demanding environments.
At Punit Fasteners, we prioritize the safety and quality of our ASTM A 453 GR 660 Class D fasteners with careful packaging. Each binder is carefully inspected and individually wrapped to protect against corrosion. They are then placed in tightly labeled boxes with detailed product details and quantities. Our packaging materials ensure that fasteners are adequately protected during transit, and maintain their high strength and integrity for use in critical, high-temperature applications.
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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