High Quality Incoloy Sheets & Plates
800 / 800H / 800HT / 825 • Formable • Ductile • Machinable
Get a QuoteIncoloy Grades 800 / 800H / 800HT / 825 Explained
Incoloy 800, 800H, 800HT, and 825 are high-performance nickel–iron–chromium alloys engineered to deliver excellent strength, oxidation resistance, and corrosion protection in both elevated-temperature and aggressive chemical environments. Unlike conventional stainless steels, these alloys maintain structural stability and corrosion resistance under prolonged heat exposure, carburizing atmospheres, and acidic or chloride-rich conditions. Each grade is tailored for specific service demands—Incoloy 800 for general high-temperature and oxidation resistance, 800H for enhanced creep and rupture strength, 800HT for superior high-temperature stability with controlled aluminum and titanium additions, and 825 for exceptional resistance to sulfuric, phosphoric, and chloride-containing acids.
Widely used in heat exchangers, furnace systems, petrochemical plants, chemical processing, pollution control, power generation, marine piping, and nuclear facilities, these Incoloy grades offer an excellent balance of mechanical strength, corrosion resistance, and fabrication ease. Their good weldability, resistance to thermal fatigue, and long-term durability under extreme operating conditions make them ideal for sheets, plates, tubes, and pressure-retaining components. With an optimal combination of cost-effectiveness, thermal stability, and chemical resistance, Incoloy 800/800H/800HT/825 are the preferred alloys for high-temperature structural service and highly corrosive chemical processing applications.
800/800H/800HT/825 INCOLOY SHEETS AND PLATES EQUIVALENT GRADES
| STANDARD | WERKSTOFF NR. | UNS | GOST | AFNOR | JIS | BS | EN | OR |
|---|---|---|---|---|---|---|---|---|
| Incoloy 800 | 1.4876 | N08800 | 3M670 | Z8NC32-21 | NCF 800 | NA 15 | X10NiCrAlTi32-20 | XH32T |
| Incoloy 800H | 1.4958 / 1.4876 | N08810 | 3M670 | Z8NC33-21 | NCF 800H | NA 15(H) | X5NiCrAlTi31-20 | XH32T |
| Incoloy 800HT | 1.4859 / 1.4876 | N08811 | 3M670 | – | NCF 800HT | NA 15(HT) | X8NiCrAlTi32-21 | XH32T |
| Incoloy 825 | 1.4876 | N08825 | 7/03 | NFE30C20DUM | NCF 825 | NA 16 | NiCr21Mo | XH38BT |
SPECIFICATION OF INCOLOY 800/800H/800HT/825 SHEETS AND PLATES
| Standard | ASTM B168 / ASME SB168 |
|---|---|
| Dimension Standard | JIS, AISI, ASTM, GB, DIN, EN, etc |
| Width | 1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc |
| Length | 2000mm, 2440mm, 3000mm, 5800mm, 8000mm, etc |
| Thickness | 0.3 mm to 120 mm |
| Form | Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Perforated Sheet, Chequered Plate, Strip, Flats, Blank (Circle), Ring (Flange) etc. |
| Surface Finishing | Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, Chequered, embossed, hair line, sand blast, Brush, etching, SATIN (Met with Plastic Coated) etc. |
CHEMICAL COMPOSITION OF INCOLOY 800/800H/800HT/825 SHEETS AND PLATES
| Grade | C | Mn | Si | S | Cu | Fe | Ni | Cr | Al | Ti |
|---|---|---|---|---|---|---|---|---|---|---|
| 800 | 0.10 max | 1.50 max | 1.00 max | 0.015 max | 0.75 max | 39.50 min | 30.00 – 35.00 | 19.00 – 23.00 | 0.15 – 0.60 | 0.15 – 0.60 |
| 800H | 0.05 – 0.10 | 1.50 max | 1.00 max | 0.015 max | 0.75 max | 39.50 min | 30.00 – 35.00 | 19.00 – 23.00 | 0.15 – 0.60 | 0.15 – 0.60 |
| 800HT | 0.06 – 0.10 | 1.50 max | 1.00 max | 0.015 max | 0.75 max | 39.50 min | 30.00 – 35.00 | 19.00 – 23.00 | 0.15 – 0.60 | 0.15 – 0.60 |
| Alloy 825 | 0.05 max | 1.0 max | 0.5 max | 0.03 max | 1.5 – 3.0 | 22.0 min | 38.0 – 46.0 | 19.5 – 23.5 | 0.2 max | 0.6 – 1.2 |
MECHANICAL PROPERTIES OF INCOLOY 800/800H/800HT/825 SHEETS AND PLATES
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2% Offset) | Elongation |
|---|---|---|---|---|---|
| Alloy 800 / 800H / 800HT | 7.94 g/cm3 | 1385 °C (2525 °F) | Psi – 75,000 , MPa – 520 | Psi – 30,000 , MPa – 205 | 30 % |
| Alloy 825 | 8.14 g/cm3 | 1400 °C (2550 °F) | Psi – 80,000 , MPa – 550 | Psi – 32,000 , MPa – 220 | 30 % |
💡 Practical Difference in Use – Incoloy Grades
Incoloy 800
For oxidation & carburization resistance with good high-temperature strength.
Example: Heat exchangers, petrochemical equipment, furnace components.
Incoloy 800H
For higher creep-rupture strength in continuous high-temperature service.
Example: Superheaters, reheaters, pressure vessels.
Incoloy 800HT
For extreme temperatures with maximum creep & microstructural stability.
Example: Ethylene furnaces, reformers, reactors.
Incoloy 825
For aggressive acids, seawater & chloride stress corrosion resistance.
Example: Chemical plants, marine systems, scrubbers.
Applications of Incoloy Sheets & Plates
Incoloy 800
- Heat exchanger tubesheets & baffles
- Petrochemical reformers & heaters
- Industrial furnace trays & radiant tubes
Incoloy 800H
- Boiler & superheater components
- High-temperature petrochemical furnaces
- High-temperature pressure vessels
Incoloy 800HT
- Ethylene cracking furnace internals
- Hydrogen reformers & converters
- High-temperature reactor plates
Incoloy 825
- Acid reactors & heat exchangers
- Marine seawater piping systems
- Scrubbers, FGD & pollution control units
Industries That Use Incoloy Sheets & Plates
Industries: Petrochemical, Power, Heat Treatment
Uses: Heat exchangers, reformers, furnace trays
Why: Excellent oxidation & carburization resistance
Industries: Thermal Power, Petrochemical Furnaces
Uses: Superheaters, boilers, furnace structures
Why: Superior creep rupture strength
Industries: Ethylene & Hydrogen Plants
Uses: Reformers, furnace internals
Why: Maximum thermal stability & fatigue resistance
Industries: Chemical, Marine, Pollution Control
Uses: Acid reactors, seawater piping, scrubbers
Why: Outstanding acid & SCC resistance
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