High Quality Incoloy 800/800HT/825 Fasteners
Standards Compliance • Ready Stock • Support
Get a QuotePremium Incoloy 800/800HT/825 Fasteners by Ratnadeep Steel & Engg. Co.
Ratnadeep Steel & Engg. Co. is a trusted manufacturer, exporter, and supplier of high-quality Incoloy 800, 800HT, and 825 Fasteners. Produced from premium nickel-iron-chromium alloys with advanced manufacturing technology, our Incoloy fasteners offer excellent corrosion resistance, high strength, and stability in elevated temperature environments. We provide Incoloy alloy fasteners in multiple sizes, specifications, and global standards for industrial applications.
Incoloy 800/800HT/825 fasteners are widely appreciated for their resistance to oxidation, carburization, and a variety of corrosive environments. Incoloy 800 and 800HT are ideal for high-temperature structural applications due to their thermal stability, while Incoloy 825 offers exceptional resistance to acids, chlorides, and stress corrosion cracking. These features make Incoloy fasteners suitable for harsh and corrosive service conditions.
Featuring accurate threading, smooth finish, and strict inspection standards, our Incoloy fasteners perform reliably under high temperatures, chemical exposure, and pressure conditions. They are commonly used in chemical processing, heat exchangers, oil & gas, pollution control, power plants, and marine industries. For durable, corrosion-resistant fastening solutions, Incoloy fasteners are a cost-effective and dependable option.
Our Range of Incoloy Alloy 800 / 800H / 825 Industrial Fasteners
- Incoloy 800, 800H & 825 Hex, Heavy Hex and Lock Nuts
- UNS N08800 / N08810 / N08825 Nickel-Iron-Chromium Alloys
- DIN 1.4876 & 2.4858 High-Temperature Rated Nuts
- Excellent resistance to oxidation and carburisation
- ASTM B408 Incoloy 800 / 800H / 825 Bolting
- Hex, Heavy Hex & Machine Bolt Configurations
- DIN 1.4876 / 2.4858 High-Strength Alloy Bolts
- Used in furnaces, heat exchangers & petrochemical plants
- ASTM B408 Incoloy 800 / 800H / 825 Screws
- Socket Head Cap, Button Head & Set Screws
- DIN 1.4876 Precision Threaded Screws
- Excellent strength retention at elevated temperatures
- Incoloy 800, 800H & 825 Plain and Spring Washers
- Split, Ogee & Dock Washer Configurations
- Maintains joint integrity under thermal cycling
- Ideal for high-temperature structural assemblies
- ASTM B408 Incoloy 800 / 800H / 825 Stud Bolts
- Single Ended, Double Ended & Fully Threaded Studs
- High creep and rupture strength at elevated temperatures
- Used in pressure vessels, heaters & reformers
- Incoloy 800, 800H & 825 Fully Threaded Rods
- ASTM B408 / UNS N08800, N08810 & N08825
- Excellent stability in carburising atmospheres
- Used in petrochemical, refinery & thermal systems
800 / 800HT / 825 INCOLOY ASTM B408 FASTENERS EQUIVALENT GRADES
| Standard | Werkstoff Nr. | UNS | JIS | BS | GOST | AFNOR | EN | Other |
|---|---|---|---|---|---|---|---|---|
| Incoloy 800 | 1.4876 | N08800 | NCF 800 | NA 15 | ЭИ670 | Z8NC32-21 | X10NiCrAlTi32-20 | XH32T |
| Incoloy 800HT | 1.4859 / 1.4876 | N08811 | NCF 800HT | NA 15 (HT) | ЭИ670 | — | X8NiCrAlTi32-21 | XH32T |
| Incoloy 825 | 2.4858 | N08825 | NCF 825 | NA 16 | ЭП703 | NFE30C20DUM | NiCr21Mo | XH38BT |
SPECIFICATION OF INCOLOY ALLOY FASTENERS
| Standard | ASTM / ASME SB 408 / 164 / 425 / 408 / 446 / 574 / 472 |
|---|---|
| Dimension Standards | DIN, ISO, ASTM, JIS, BS, GB, IS & International |
| Size Range | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Length | 3 mm to 200 mm |
| Types | Nuts, Bolts, Screws, Studs, Hex Bolts, Heavy Hex Bolts, Socket Head Cap Screws, Hex Nuts, Lock Nuts, Washers, Spring Washers, Threaded Rods, U-Bolts, Anchor Bolts, Eye Bolts, Foundation Bolts, Structural Fasteners |
CHEMICAL COMPOSITION OF INCOLOY INDUSTRIAL FASTENERS
| Element | Incoloy 800 | Incoloy 800HT | Incoloy 825 |
|---|---|---|---|
| Ni | 30 – 35 | 30 – 35 | 38.0 – 46.0 |
| Fe | 39.5 min | 39.5 min | 22.0 min |
| Cr | 19 – 23 | 19 – 23 | 19.5 – 23.5 |
| Cu | 0.75 max | 0.75 max | 1.5 – 3.0 |
| Ti | 0.15 – 0.60 | 0.15 – 0.60 | 0.6 – 1.2 |
| Al | 0.15 – 0.60 | 0.15 – 0.60 | 0.2 max |
| C | 0.10 max | 0.05 – 0.10 | 0.05 max |
| Mn | 1.5 max | 1.5 max | 1.0 max |
| S | 0.015 max | 0.015 max | 0.015 max |
| Si | 1.0 max | 1.0 max | 0.5 max |
| Mo | — | — | 2.5 – 3.5 |
MECHANICAL PROPERTIES OF ASME SB408 INCOLOY BOLTS & NUTS
| Incoloy 800 / 800HT | |
|---|---|
| Tensile Strength | 75,000 psi (520 MPa) |
| Yield Strength (0.2% Offset) | 30,000 psi (205 MPa) |
| Elongation | 30% |
| Incoloy 825 | |
| Tensile Strength | 80,000 psi (550 MPa) |
| Yield Strength (0.2% Offset) | 32,000 psi (220 MPa) |
| Elongation | 30% |
PHYSICAL PROPERTIES OF INCOLOY 800 / 800HT / 825 FASTENERS
| Property | Value |
|---|---|
| Density @ 68°F | 0.285 lb/in³ |
| Thermal Conductivity | 9.4 Btu/hr·ft·°F @ 212°F |
| Electrical Resistivity | 28.3 µΩ·in @ 68°F |
| Modulus of Elasticity | 28 × 10⁶ psi |
| Thermal Expansion (32–212°F) | 9.4 × 10⁻⁶ /°F |
| Specific Heat | 0.120 Btu/lb·°F |
| Melting Range | 2500 – 2590 °F |
💡 Practical Difference in Use
Use Incoloy 800 / 800HT / 825 Fasteners when: excellent corrosion resistance and stable strength are needed in high-temperature and chemical environments. → Example: heat exchangers, chemical plants, furnaces, and pollution control systems.
Applications of Incoloy 800 / 800HT / 825 Fasteners
Incoloy 800, 800HT, and 825 fasteners (UNS N08800 / N08811 / N08825) offer excellent resistance to oxidation, carburization, and corrosive chemicals. Incoloy 800 and 800HT are ideal for structural strength at elevated temperatures, while Incoloy 825 provides superior resistance to acids, chlorides, and stress corrosion cracking. These fasteners are suitable for long-term service in demanding environments.
- Chemical Processing: Heat exchangers, tanks, and piping systems.
- Power Plants: Boilers and superheaters.
- Pollution Control: Scrubbers and exhaust systems.
When to Choose Incoloy 800 / 800HT / 825 Fasteners?
Incoloy alloy fasteners are chosen for reliable corrosion resistance and structural stability at elevated temperatures.
Choose Incoloy Fasteners when:
- High-temperature oxidation resistance is required
- Exposure to acidic or chloride media exists
- Thermal stability is important
- Resistance to stress corrosion cracking is needed
- Cost-effective high-performance alloys are preferred
Industries That Use Incoloy Fasteners
Incoloy fasteners are widely used where heat and corrosion resistance are essential.
Handles corrosive chemicals.
Uses
Processing equipment and piping.
Why Incoloy?
Excellent acid and chloride resistance.
Reliable in heat-intensive systems.
Uses
Boilers and heat exchangers.
Why Incoloy?
Stable strength at elevated temperatures.
Resists corrosive exhaust gases.
Uses
Scrubbers and stack systems.
Why Incoloy?
Strong oxidation and corrosion resistance.
Usage Guide for Incoloy 800 / 800HT / 825 Fasteners
Incoloy 800, 800HT, and 825 nuts provide reliable corrosion resistance and strength at elevated temperatures.
Choose Incoloy Nuts when
- Used in high-temperature chemical environments
- Resistance to oxidation and carburization is needed
- Exposure to acidic or chloride media exists (825)
- Long service life is required
Incoloy alloy bolts ensure stable fastening in heat exchangers and chemical processing equipment.
Choose Incoloy Bolts when
- Used in boilers and pressure vessels
- High-temperature oxidation resistance is required
- Chloride stress corrosion cracking resistance is needed
- Cost-effective heat-resistant alloys are preferred
Incoloy screws provide dependable fastening in corrosive and high-temperature settings.
Choose Incoloy Screws when
- Used in furnaces and chemical plants
- Exposure to oxidation and scaling exists
- Moderate-to-high strength is sufficient
- Reliable corrosion resistance is needed
Incoloy washers help distribute loads while resisting heat and corrosion.
Choose Incoloy Washers when
- Used in high-temperature flange joints
- Oxidation and carburization resistance is required
- Exposure to acidic chemicals occurs
- Joint reliability is important
Incoloy stud bolts are suitable for heat exchangers and chemical processing units.
Choose Incoloy Stud Bolts when
- High-temperature service is involved
- Resistance to corrosion and scaling is needed
- Moderate mechanical strength is sufficient
- Long-term durability is required
Incoloy threaded rods offer versatile fastening in chemical and thermal systems.
Choose Incoloy Threaded Rods when
- Custom-length fastening is needed
- Used in boilers and heat exchangers
- Resistance to oxidation and acids is required
- Cost-effective corrosion-resistant fasteners are preferred
Our Industrial Fasteners are manufactured using precision forging and machining processes to ensure excellent dimensional accuracy, strength, and long-term performance. Each fastener undergoes strict quality inspections, including visual and dimensional checks, tensile testing, hardness testing, and thread gauging to verify compliance with specified tolerances.
Comprehensive chemical composition analysis and mechanical property testing are carried out to confirm material integrity and standard conformity. Where required, additional NDT methods such as ultrasonic testing, magnetic particle inspection (MPI), or dye penetrant testing (DPT) are performed to detect surface or internal defects. Controlled forging, heat treatment, and threading processes eliminate issues such as cracks, laps, and thread imperfections.
All fasteners are manufactured and tested in accordance with international standards including ASTM, ASME, ISO, DIN, BS, and IS specifications. Engineered for reliable performance in high-pressure, high-temperature, and corrosive environments, our fasteners are widely used across oil & gas, petrochemical, power generation, construction, and heavy engineering industries.
Request a Quote
Looking for high-quality Incoloy 800/800HT/825 Fasteners? Get in touch with us today.
Contact Us