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Ramu Fasteners has built a solid reputation as a reliable **manufacturer and supplier based in Hyderabad**, focusing on top-notch ASTM A453 GR 660 Class D Nuts, designed for high-temperature and high-strength applications. With a commitment to precision manufacturing, rigorous quality checks, and compliance with international standards, the company provides durable fastening solutions that stand up to tough service conditions. Ramu Fasteners caters to essential industries like petrochemical, power generation, oil & gas, and heavy engineering, delivering products that boast excellent mechanical integrity and corrosion resistance. Known for their competitive pricing, prompt delivery, and knowledgeable technical support, Ramu Fasteners has gained the trust of clients needing ASTM A453 Grade 660 Class D nuts for critical bolted joints.
ASTM A453 GR 660 Class D Nuts are crafted from **UNS S66286 precipitation-hardening stainless steel, commonly referred to as Alloy A286**, which is rich in nickel, chromium, molybdenum, titanium, and trace elements. This unique blend offers impressive strength at elevated temperatures, resistance to oxidation, and long-lasting durability. Class D fasteners undergo specialized heat treatment to enhance their mechanical properties. They typically showcase a **minimum tensile strength of 895 MPa (130 ksi), a yield strength around 725 MPa (105 ksi), with at least 15% elongation and 18% reduction of area**, making them perfect for demanding service environments. ([A453Grade660][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 nuts are crucial in high-stress, high-temperature applications. Commonly used in aerospace components, power generation equipment, and petrochemical processing, these nuts secure critical parts such as gas turbines, reactor vessels, and exhaust systems. Their exceptional strength and thermal resistance make them ideal for environments subject to extreme conditions. These nuts ensure reliable performance and safety in demanding industrial settings, maintaining structural integrity under severe operational pressures.
ASTM A453 GR 660 Class D Nuts find extensive use in **high-temperature and high-stress bolted joints** where strength, stress-rupture resistance, and corrosion resistance are paramount. They are particularly suited for **pressure vessels, boilers, heat exchangers, flanges, and valve assemblies** in sectors like petrochemical, chemical processing, and power generation.
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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