| Size Range | 5 mm to 600 mm diameter |
|---|---|
| Length | 3-200mm |
| Standards | Asme, Astm, Din, Nf, Jis, En, Ios |
| Finished | Black, Bright, Cold Drawn, Polish, Polished, Centreless Ground |
Grade 660 Round Bar Manufacturer in India Providing Premium Quality Round Bars with Long Service Life
Neptune Alloy is a leading Grade 660 Round Bar Manufacturer in India provides high-strength iron-nickel-chromium alloy bars which are designed to be used in the activities that demand very high performance in high temperatures. Grade 660 is commonly used in power generation, petrochemical plants as well as heavy engineering due to its good creep resistance, excellent corrosion behavior as well as its stable mechanical features. These round bars manufactured are a result of controlled melting, heat treatment and machining processes to achieve uniform structure, correct dimensions as well as service life.
Grade 660 round bars from Indian sources include:
- High tensile and yield strength at both normal and high temperatures
- Excellent resistance to creep and stress rupture
- Good corrosion and oxidation resistance
- Smooth surface finish suitable for machining and threading
- Wide diameter and length availability for different project needs
- Consistent quality for bulk and repeat orders
There are also other high-performance materials like Waspaloy Round Bar, Alloy Round Bars, and Alloy 20 UNS N08082 Round Bar, provided by the manufacturers, which leave the buyers with the option to use the materials depending on the temperature levels, level of corrosion and mechanical load. These alloy alloys are generally applied in turbines, fasteners, heat exchangers, and chemical processing equipment. Chemical composition and mechanical properties of each product are tested to provide quality with the international standards.
Grade 660 Round Bar – Material and Application Specifications Table
Material | Standard / Grade | Form | Diameter Range | Key Properties | Typical Applications |
Grade 660 | ASTM A453 / A286 | Round Bar | 10 mm – 300 mm | High creep & heat resistance | Turbines, fasteners |
Waspaloy | AMS 5707 / 5708 | Round Bar | 8 mm – 250 mm | Very high temperature strength | Aerospace parts |
Alloy 20 | UNS N08082 | Round Bar | 10 mm – 200 mm | Excellent acid corrosion resistance | Chemical plants |
Alloy Steel | Various Grades | Round Bar | 12 mm – 350 mm | High strength & toughness | Heavy engineering |
Grade 660 Round Bar – Product Supplied Quantity by City
Product Type | Supplied Quantity | City |
Grade 660 Round Bar | 22 Tons | Mumbai |
Waspaloy Round Bar | 14 Tons | Ahmedabad |
Alloy 20 UNS N08082 Round Bar | 18 Tons | Chennai |
Alloy Round Bars | 30 Tons | Pune |
Type of Sub-products

Grade 660 Class A Round Bar Grade 660 Class A Round Bar
Designed for moderate tensile strength and good creep resistance. Suitable for general bolting and turbine components operating at elevated temperatures.

Grade 660 Class B Round Bar Grade 660 Class B Round Bar
Offers higher strength than Class A, ideal for structural fasteners and pressure vessel applications in thermal and nuclear power environments.
