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The Mumbai, India-based Fasteners Mart is a well-established manufacturer and worldwide supplier of industrial fasteners of high performance. Among its top-of-the-line products are ASTM A453 GR 660 Class B Nuts, which are designed to function in high-temperature and high-pressure conditions. These nuts are typically hex-shaped and are made from a heat-resistant iron-nickel alloy, which is specially engineered to withstand the stringent requirements of ASTM A453 Grade 660 Class B. Renowned for superior mechanical strength and resistance to oxidation, these nuts are perfectly suited for petrochemical, aerospace, and power generation industries where performance in harsh conditions is paramount.
ASTM A453 GR 660 Class B Nuts consist mainly of iron, nickel (24–27%), chromium (13–17%), with molybdenum, titanium, and manganese added to them. These alloying components offer superior strength and oxidation and creep resistance at high temperatures. In terms of mechanical properties, these nuts offer a tensile strength of 965 MPa and yield strength of 585 MPa. With superior elongation and hardness, they show structural stability under heat stress. Physically, they provide strength up to temperatures of 704°C, thereby qualifying for extreme high-temperature service conditions.
Material | Dimensions | Standards | Size | Length |
ASTM A453 GR 660 CLASS B Nuts | 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 B Nuts are found in extensive usage in high-temperature and high-stress environments like gas turbines, pressure vessels, nuclear reactors, and exhaust systems. Some other uses include heat exchangers, aerospace engine assemblies, steam turbines, and furnace parts. Their remarkable resistance to thermal expansion, oxidation, and stress-corrosion cracking makes them suitable for assemblies subjected to extended heat and mechanical stress. These nuts provide safety and performance in harsh environments where standard materials may fail under extreme operating conditions.
The Fasteners Mart provides guaranteed timely delivery and effective logistics of ASTM A453 GR 660 Class B Nuts in local as well as international markets. Goods are wrapped with long-lasting wooden crates, HDPE bags, or cartons, provided with anti-corrosive covers. The packaging is well identified with batch numbers and specifications to facilitate precise tracking and effortless handling while storage and transit.
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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