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The Fasteners Mart, Mumbai, India, is a reliable manufacturer and exporter of industrial fasteners with high performance for critical uses in industries. With emphasis on superior material, accurate engineering, and international standards, the company produces fasteners that are capable of meeting stringent mechanical and thermal needs. Amongst its specialty products are ASTM A453 GR 660 Class D Nuts, which are produced in hex and heavy hex forms from an iron-nickel-chromium alloy. These nuts can handle high stress, high temperature, and corrosive environments, and therefore find applications in power generation and high-temperature service conditions.
ASTM A453 GR 660 Class D Nuts contain Nickel (24–27%), Chromium (13–17%), Iron, and minor amounts of Manganese, Titanium, and Aluminum. They provide higher mechanical strength with a minimum tensile strength of 895 MPa and yield strength of 585 MPa. They are designed to maintain performance at temperatures ranging from 704°C (1300°F). With a density of 7.9 g/cm³, they exhibit excellent creep and oxidation resistance. These properties provide long-term reliability under thermal stress and mechanical load, even in corrosive and high-pressure conditions.
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 A453 GR 660 Class D Nuts are frequently used in pressure and high-temperature applications in industries such as power generation, petrochemicals, and aerospace. The nuts play an important role in steam turbines, pressure vessels, exhaust systems, heat exchangers, and boiler assemblies. Their structural stability under changing temperatures qualifies them for application in nuclear and thermal power generation plants. They are also utilized in refinery applications where heat as well as corrosion resistance is crucial. Their performance reliability makes them a default application for critical fastening systems operating under severe environments.
The Fasteners Mart delivers ASTM A453 GR 660 Class D Nuts safely and in time, professionally packaged in moisture-proof wrapping, strong cartons, or wooden crates. Each shipment is well labeled and has proper documentation for easy recognition and international clearance, ensuring safe transport and punctual delivery to domestic and overseas locations.
The Fasteners Mart is a leading manufacturer and supplier of high-quality fasteners in Mumbai, India, with over 8 years of experience serving global industries.
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