ASTM A453 GR 660B Bolts, ASTM A453 GR 660B Stud Bolts, Heavy Hex Bolts & 660B Bolting Supplier in Mumbai, India
Unifit Metal Alloys is a manufacturer, supplier, stockist and exporter of ASTM A453 GR 660B Bolts in Mumbai, India, supplying high-strength stainless steel bolting components for pressure equipment, flanged connections, valves, piping systems and elevated-temperature industrial applications. Grade 660B is a precipitation-hardening austenitic stainless steel grade selected for applications requiring enhanced mechanical strength and dependable performance under demanding service conditions. We supply different diameters, lengths, thread forms and configurations for standard and customized requirements.
ASTM A453 GR 660B Bolts are manufactured and heat-treated to develop higher mechanical strength for demanding bolted assemblies. Their precipitation-hardening characteristics allow the fasteners to maintain reliable clamping performance under elevated temperatures and heavy service loads. The stainless steel base also provides useful resistance to corrosion and oxidation, making the grade suitable for industrial environments where both strength and material durability are important.
ASTM A453 GR 660B Bolts, ASTM A453 GR 660B Stud Bolts, Heavy Hex Bolts & 660B Bolting Manufacturer and Supplier in Mumbai, India
These bolts are commonly used in power-generation equipment, turbines, petrochemical plants, refineries, pressure vessels, heat exchangers, high-temperature piping, chemical-processing equipment and heavy industrial machinery. Their combination of high strength and stainless steel corrosion resistance makes them suitable for critical fastening applications where reliable joint integrity is required.
At Unifit Metal Alloys, we supply ASTM A453 GR 660B Bolts in various sizes, lengths, thread configurations and surface finishes. We cater to maintenance requirements, fabrication work, bulk orders and industrial projects.
Get the Best Quote for ASTM A453 GR 660B Bolts. We Stock ASTM A453 GR 660B Bolts in Various Diameters, Lengths, Thread Sizes, Specifications and Surface Finishes. Contact Us Today for a Competitive Quote.
ASTM A453 GR 660B Bolts Specifications
| Material | Precipitation-Hardening Austenitic Stainless Steel |
|---|---|
| Grade | ASTM A453 Grade 660B |
| Standard | ASTM A453 / ASME SA453 |
| Equivalent Grade | UNS S66286 / Alloy A-286 / Grade 660 |
| Product Type | Hex Bolts, Heavy Hex Bolts, Stud Bolts, Screws, Threaded Rods and Custom Fasteners |
| Size Range | M6 to M100 | 1/4″ to 4″ | Custom Sizes Available |
| Length | 10 mm to 1000 mm | Custom Lengths Available |
| Thread Standard | UNC, UNF, UNEF, Metric, BSW, BSF and Custom Threads |
| Manufacturing Process | Cold Forged, Hot Forged, Machined and Thread Rolled |
| Heat Treatment | Solution Treated and Precipitation Hardened |
| Finish | Plain, Passivated, Pickled, Polished and Custom Finishes |
| Corrosion Resistance | Excellent Resistance to Corrosion, Oxidation and Stress Corrosion Cracking |
| Temperature Resistance | Suitable for High-Temperature Service |
| Application | Aerospace, Gas Turbines, Power Generation, Petrochemical, Chemical Processing, Oil & Gas and High-Temperature Industrial Equipment |
| Packaging | Cartons, Wooden Cases, Pallets, Bulk and Custom Packaging |
Chemical Composition for ASTM A453 GR 660B Bolts
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.08 max. |
| Manganese (Mn) | 2.00 max. |
| Silicon (Si) | 1.00 max. |
| Phosphorus (P) | 0.040 max. |
| Sulfur (S) | 0.030 max. |
| Nickel (Ni) | 24.00 – 27.00 |
| Chromium (Cr) | 13.50 – 16.00 |
| Molybdenum (Mo) | 1.00 – 1.50 |
| Titanium (Ti) | 1.90 – 2.35 |
| Aluminum (Al) | 0.35 max. |
| Vanadium (V) | 0.10 – 0.50 |
| Boron (B) | 0.001 – 0.010 |
| Iron (Fe) | Balance |
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Mechanical Properties of ASTM A453 GR 660B Bolts
| Property | ASTM A453 Grade 660B |
|---|---|
| Tensile Strength | 1035 MPa min. |
| Yield Strength (0.2% Offset) | 725 MPa min. |
| Elongation | 15% min. |
| Reduction of Area | 20% min. |
| Hardness | 321 HBW max. |
Ready Stock of ASTM A453 GR 660B Bolts
ASTM A453 GR 660B Bolts Application Industries
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