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Hamad Fasteners, based in Riyadh, Saudi Arabia, has made a name for itself as a leading manufacturer and supplier of high-performance fastening products designed to meet international standards. With a strong focus on quality and reliability, the company caters to various industries, including oil & gas, petrochemical, power generation, marine, and construction. One of their standout products, the ASTM A 453 GR 660 Class D Nuts, is particularly prized for its exceptional strength, impressive resistance to high temperatures, and remarkable durability. These nuts provide secure and long-lasting fastening solutions, especially in critical and demanding industrial settings.
The ASTM A 453 GR 660 Class D Nuts are crafted from precipitation-hardened alloy steel, which includes a blend of iron, chromium, nickel, molybdenum, and titanium. This unique alloy composition offers outstanding resistance to stress corrosion cracking and oxidation, even at elevated temperatures. With a tensile strength of about 160 ksi, these nuts boast the highest strength among all class variants of this grade while still maintaining excellent toughness and creep resistance. Their robust chemical and mechanical properties make them a reliable choice for applications that require maximum durability and safety.
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.
These nuts find extensive use in industries that need secure fastening under extreme service conditions. They’re commonly used in steam turbines, gas turbines, pressure vessels, and boilers, where high strength and resistance to thermal stress are essential. Petrochemical plants, refineries, and power generation facilities depend on them for safe and stable connections in flanges, heat exchangers, and other critical equipment. Additionally, ASTM A 453 GR 660 Class D Nuts are well-suited for marine and chemical processing environments, providing leak-proof, durable, and long-lasting performance even in harsh operating conditions.
Hamad Fasteners is one of the Industrial suppliers and manufacturers of quality fasteners in Riyadh, Saudi Arabia, that has spent more than 12 years serving various industries.
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