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Ramu Fasteners has made a name for itself as a leading **manufacturer and supplier in Hyderabad**, focusing on top-notch ASTM A453 GR 660 Class D Bolts designed for high-temperature and high-strength industrial needs. By utilizing cutting-edge manufacturing techniques and strict quality control measures, Ramu Fasteners delivers Class D bolts that adhere to rigorous international standards for performance, durability, and reliability. Catering to vital sectors like petrochemical, power generation, oil & gas, and heavy engineering, the company provides fasteners that can handle tough service conditions. With a reputation for prompt delivery, competitive pricing, and solid technical support, Ramu Fasteners is the go-to choice for engineers and project partners in search of precision-engineered ASTM A453 Grade 660 Class D bolting solutions.
ASTM A453 GR 660 Class D Bolts are crafted from **UNS S66286 precipitation-hardening stainless steel (Alloy A286)**, which boasts a high nickel content (24–27%), chromium (13.5–16%), molybdenum (1.00–1.50%), and titanium (1.90–2.35%) for outstanding strength and corrosion resistance at elevated temperatures. The material undergoes solution treatment and proper aging to achieve impressive mechanical properties. Class D fasteners generally provide a **minimum tensile strength of around 895 MPa and a yield strength of about 725 MPa**, along with good elongation and hardness, making them perfect for high-stress, high-temperature environments. ([Astma453Grade660][1])
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.
ASTM A 453 GR 660 Class D bolts are essential for high-temperature and high-stress applications. Commonly used in aerospace, power generation, and petrochemical sectors, they secure critical components like gas turbines, reactor vessels, and exhaust systems. Their exceptional strength and resistance to extreme conditions make them ideal for maintaining structural integrity and performance in challenging environments. These bolts are designed to withstand severe temperatures and corrosive elements, ensuring reliable operation and safety.
ASTM A453 GR 660 Class D Bolts find extensive use in scenarios where **high strength, thermal stability, and corrosion resistance** are crucial. They are particularly well-suited for **pressure vessel assemblies, boiler systems, high-temperature piping flanges, and valve connections** across industries like petrochemical, chemical processing, power plants, and oil & gas. Their unique alloy composition ensures they can handle the demands of these challenging applications.
Ramu Fasteners is a leading manufacturer and supplier of high-quality fasteners in Hyderabad, India, with over 8 years of experience serving global industries.
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