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Punit Fasteners is a trusted manufacturer and supplier of Incoloy 800/800H/800HT Stud Bolts in Delhi, India. These high-performance stud bolts are made from heat-resistant iron-nickel-chromium alloys, which are perfect for high-temperature settings. The Incoloy 800 series is known for its excellent resistance to oxidation, carburization, and stress rupture. The H and HT variants have higher carbon content and controlled levels of aluminum and titanium for improved strength and creep resistance. Manufactured to ASTM B408/B564 standards, our stud bolts are used in petrochemical facilities, power plants, and heat exchanger systems. Punit Fasteners delivers precisely threaded, durable fasteners designed for thermal and chemical endurance.
Incoloy 800/800H/800HT Stud Bolts consist of 30–35% nickel, 19–23% chromium, and iron as the base, with added carbon, aluminum, and titanium. These materials offer excellent tensile strength (500–700 MPa), yield strength (200–350 MPa), and strong creep and rupture resistance at temperatures up to 1100°C. The 800H and 800HT variants are specially treated for high-temperature applications. The alloy resists oxidation, carburization, and chloride-induced stress corrosion cracking, making it very reliable in harsh industrial conditions. It also maintains stability and elongation during long-term thermal cycling.
| Grades |
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| ASTM | ASTM F2281, ASTM F468M, ASTM F468 UNS N08825, ASTM F467 |
| Incoloy Fasteners Sizes |
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| Alloy 825 Bolts Size Metric |
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| Incoloy Hex Bolts Size Inch |
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| Standard | Manufacturer of Incoloy Fasteners as per IS, ANSI, ASTM, DIN, ISO, JIS, GB, ASME, BS, UNI, CSN, EU, IFI, PN, and all International Standards
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Grade |
Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness |
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Rockwell B (HR B) max |
Brinell (HB) max |
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Incoloy Fasteners |
Psi – 75,000 , MPa – 520 |
Psi – 30,000 , MPa –205 |
30 |
– |
– |
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Grade |
C |
Mn |
Si |
Fe |
S |
Cr |
Al-Ti |
Ni |
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Incoloy Fasteners |
min. |
– |
– |
– |
39.5 |
– |
19.0 |
0.15 |
30.0 |
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.
Incoloy 800/800H/800HT Stud Bolts are widely used in refineries, petrochemical processing plants, thermal power stations, and industrial furnaces. They are ideal for fastening components in heat exchangers, superheaters, steam headers, and reformer tubes that operate at high temperatures. These bolts keep their mechanical strength in high-pressure steam and acidic or oxidizing environments. Their resistance to carburization and thermal fatigue makes them necessary for hydrocarbon cracking, sulfur recovery systems, and gas turbines. Incoloy stud bolts provide secure, long-lasting fastening in extreme conditions where regular fasteners would fail under prolonged thermal and chemical stress.
At Punit Fasteners, we ensure that our Incoloy 800/800H/800HT stud bolts are packaged with the utmost care to preserve their quality and performance. Each stud bolt is thoroughly inspected and individually wrapped in protective material to prevent damage during transit. They are then packed in sturdy, clearly labeled boxes detailing product specifications and quantities. Our packaging is designed to protect against environmental factors and physical impacts, ensuring that your high-performance stud bolts arrive in excellent condition.
Punit Fasteners is a leading manufacturer and supplier of high-quality fasteners in Delhi, India, with over 15 years of experience serving global industries.
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