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The Fasteners Mart, Mumbai, India, is a renowned manufacturer and supplier of industrial fasteners, serving different industries with precision-engineered parts. Renowned for consistent quality, technical know-how, and timely service, the company provides a comprehensive assortment of specialty fasteners for high-temperature and high-stress applications. One of the most important products is the ASTM A453 GR 660 Class D Bolts, which are high-strength and heavy-duty bolts manufactured from iron-nickel-chromium alloy. They come in a range of shapes like hex bolts and stud bolts that work under extreme conditions of pressure and heat.
ASTM A453 GR 660 Class D Bolts consist of Iron, Nickel (~24–27%), Chromium (~13–17%), Manganese, and minute traces of elements such as Titanium and Aluminum. These bolts show superior high-temperature strength with tensile strength greater than 895 MPa and yield strength greater than 585 MPa. They have structural integrity up to 704°C (1300°F) and are therefore best suited for high-pressure and thermal conditions. Their density is approximately 7.9 g/cm³, and they offer excellent oxidation resistance and low creep. These properties make them reliable for critical applications in power plants and petrochemical industries.
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 Bolts are widely used in high-temperature and high-stress environments such as gas turbines, exhaust systems, nuclear reactors, pressure vessels, and petrochemical equipment. These bolts are used in power generation and refining applications where mechanical strength as well as heat resistance is important. Their performance under fluctuating thermal conditions and high-pressure applications makes them best suited for fasteners in steam and gas turbine casings, heat exchangers, and boiler equipment. They are also required in structural assemblies where thermal cycling is frequent.
The Fasteners Mart is committed to safe, on-time delivery of ASTM A453 GR 660 Class D Bolts in export-grade, moisture-resistant packaging. Products are supplied sealed in cartons or wooden boxes, labeled and documented for traceability across the world. Every package guarantees protection during transport and meets international shipping specifications.
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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