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Punit Fasteners stands out as a leading manufacturer and supplier of ASTM A453 Grade 660 Class D Nuts, proudly based in Delhi, India. With a strong focus on quality and precision, Punit Fasteners delivers high-performance fasteners that adhere to rigorous international standards. These ASTM A453 GR 660 Class D Nuts are specifically crafted for high-temperature applications and find their place in various demanding industries. Made from top-notch raw materials and utilizing cutting-edge technology, these nuts ensure durability, corrosion resistance, and impressive mechanical strength. With a customer-first mindset, prompt delivery, and competitive pricing, Punit Fasteners caters to clients across multiple sectors both in India and internationally.
The ASTM A453 Grade 660 Class D Nuts are constructed from precipitation-hardened austenitic stainless steel, enriched with elements like chromium, nickel, molybdenum, and titanium. They undergo heat treatment to achieve remarkable mechanical properties, boasting a minimum tensile strength of 100 ksi (690 MPa) and a yield strength of 85 ksi (585 MPa). These nuts excel in resisting oxidation and stress corrosion cracking, particularly in high-temperature settings. The Class D variant offers enhanced strength compared to other classes, making them ideal for critical service applications where both strength and corrosion resistance are vital.
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 Nuts primarily in high-temperature and high-pressure environments, such as power plants, gas turbines, heat exchangers, nuclear reactors, and petrochemical facilities. They play a crucial role in securing bolts in flanged joints and other components that face thermal cycling and mechanical stress. Thanks to their exceptional strength and resistance to scaling and oxidation at elevated temperatures, they are highly sought after in the aerospace, marine, and oil & gas industries. Their reliability in extreme conditions guarantees long-lasting performance and operational safety.
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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