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Punit Fasteners, a well-respected manufacturer and supplier located in Delhi, India, specializes in high-quality ASTM A453 GR 660 Class D bolts that are perfect for high-stress and high-temperature environments. These bolts are made from precipitation-hardened austenitic stainless steel, offering outstanding mechanical strength, thermal stability, and excellent resistance to oxidation. Punit Fasteners guarantees that every product meets ASTM standards and goes through rigorous quality checks. The company serves various industries, including power generation, aerospace, petrochemicals, and energy, providing reliable and high-performance bolting solutions for critical applications where durability and safety are paramount.
The ASTM A453 GR 660 Class D bolts are crafted from austenitic stainless steel, which contains about 24–27% nickel, 13–17% chromium, 1.0–1.5% molybdenum, along with trace amounts of manganese, titanium, and aluminum. These materials undergo heat treatment through solution annealing and aging processes to boost their mechanical strength. With a tensile strength of around 125 ksi (860 MPa) and a yield strength of approximately 105 ksi (725 MPa), these bolts are built to last. They also show remarkable resistance to stress rupture, creep, and oxidation at temperatures reaching up to 704°C, making them ideal for extreme heat and pressure situations.
Material | Dimensions | Standards | Size | Length |
ASTM A453 GR 660 CLASS D 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 D bolts in various demanding applications where high temperatures and significant mechanical loads are a given. In power generation plants, they play a crucial role in turbines, heat exchangers, and boiler systems. In the aerospace sector, they’re essential for engine assemblies and structural components that face thermal cycling. Petrochemical and refinery facilities rely on these bolts for high-pressure systems, reactors, and flanged joints. Their exceptional resistance to creep, oxidation, and thermal fatigue also makes them a great fit for nuclear, marine, and industrial equipment that requires long-lasting structural integrity.
At Punit Fasteners, we prioritize the safety and quality of our ASTM A 453 GR 660 Class D bolts during shipping. Each bolt is thoroughly inspected and individually tightened to prevent damage. We pack them in hard labeled boxes that clearly show product details and quantities. These meticulous packaging ensures that our bolts remain in pristine condition, ready to meet the demanding demands of high temperatures and high pressures upon arrival the solution of the.
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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