INCOLOY® Alloy 800 Product Introduction
INCOLOY® Alloy 800, also known as UNS N08800, is a widely used nickel-iron-chromium alloy known for its excellent resistance to oxidation, carburization, and sulfidation at elevated temperatures. This comprehensive product introduction covers its chemical composition, mechanical properties, performance at different temperatures, industry applications, shapes, sizes, production standards, standards and corresponding grades in different countries, welding, machining, polishing, heat treatment, cold working, advantages and disadvantages of materials, and similar products.
Chemical Composition
| Element | Composition (%) |
|---|---|
| Nickel (Ni) | 30.0 – 35.0 |
| Chromium (Cr) | 19.0 – 23.0 |
| Iron (Fe) | 39.5 min |
| Aluminum (Al) | 0.15 – 0.60 |
| Carbon (C) | 0.10 max |
| Manganese (Mn) | 1.50 max |
| Sulfur (S) | 0.015 max |
| Silicon (Si) | 1.0 max |
INCOLOY® Alloy 800 maintains a high nickel content with significant chromium for oxidation resistance and iron for structural stability.
Mechanical Properties
| Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HRB) |
|---|---|---|---|---|
| Annealed | 520-690 | 210-550 | 30 min | 65 max |
| Cold Worked | 860 min | 690 min | 20 min | 75 max |
INCOLOY® Alloy 800 exhibits excellent mechanical properties, particularly in the annealed condition, making it suitable for high-temperature applications.
Performance at Different Temperatures
| Temperature Range | Performance |
|---|---|
| Room Temperature | Excellent resistance to oxidation and corrosion |
| Elevated Temperatures (up to 1100°C / 2000°F) | Retains strength and oxidation resistance |
| Cryogenic Temperatures | Maintains ductility and toughness |
INCOLOY® Alloy 800 demonstrates consistent performance across a wide temperature range, from cryogenic conditions to high temperatures.
Industry Applications
INCOLOY® Alloy 800 is widely used in industries requiring heat and corrosion resistance:
| Industry | Applications |
|---|---|
| Chemical Processing | Heat exchangers, furnace components |
| Petrochemical | Ethylene furnace quench boilers, catalyst regenerators |
| Power Generation | Steam superheater and reheat tubing |
| Aerospace | Gas turbine components, combustor liners |
Its ability to withstand high temperatures and corrosive environments makes it indispensable in critical industrial applications.
Shapes, Sizes, and Production Standards
Shapes and Sizes
| Form | Size Range |
|---|---|
| Sheets | Thickness: 0.5 mm – 3 mm |
| Plates | Thickness: 1 mm – 50 mm |
| Bars | Diameter: 6 mm – 100 mm |
| Pipes | OD: 6 mm – 500 mm |
| Tubes | OD: 6 mm – 300 mm |
Production Standards and Corresponding Grades
| Country | Standard | Corresponding Grade |
|---|---|---|
| United States | ASTM B407, ASTM B408 | UNS N08800 |
| Germany | DIN 17459, DIN 17460 | X5NiCrAlTi31-20 |
| France | AFNOR Z8NC32-21 | – |
| United Kingdom | BS 3076 | NA15 |
| Japan | JIS G4801 | NCF 800 |
| China | GB/T 15004, GB/T 14976 | GH32 |
INCOLOY® Alloy 800 conforms to various international production standards, ensuring quality and compatibility across global markets.
Welding, Machining, Polishing, Heat Treatment, and Cold Working
| Process | Details |
|---|---|
| Welding | Welds with matching composition filler metals. Suitable methods include gas tungsten arc welding (GTAW) and shielded metal arc welding (SMAW). |
| Machining | Requires low cutting speeds and constant feeds to avoid work hardening and surface cracking. Carbide tools are recommended. |
| Polishing | Achieves good surface finish with mechanical methods like buffing and polishing wheels. Chemical polishing is also effective. |
| Heat Treatment | Annealing at 1150-1180°C (2100-2150°F) followed by water quenching improves ductility and removes residual stresses. |
| Cold Working | Can be cold worked up to 10% deformation for shaping. Cold working increases strength and hardness. |
INCOLOY® Alloy 800 offers versatility in processing methods, allowing for tailored solutions in various applications.
Advantages and Disadvantages
| Aspect | Advantages | Disadvantages |
|---|---|---|
| Advantages | High temperature strength and oxidation resistance | Susceptible to embrittlement in certain environments |
| Good resistance to carburization and sulfidation | Machining can be challenging | |
| Excellent formability and weldability | ||
| Long-term stability in high-temperature applications |
Similar Products
| Material Grade | Comparison |
|---|---|
| INCOLOY® alloy 825 | Higher nickel content, improved corrosion resistance in acidic environments. |
Conclusion
INCOLOY® Alloy 800 stands out as a versatile nickel-iron-chromium alloy renowned for its exceptional resistance to high-temperature oxidation and corrosion. Its robust mechanical properties, combined with excellent formability and weldability, make it a preferred choice in chemical processing, petrochemical, power generation, and aerospace industries. Engineers and designers seeking a reliable material capable of withstanding extreme temperatures and aggressive environments can rely on INCOLOY® Alloy 800 for optimal performance and longevity.
For further technical specifications and customized solutions, consulting with material suppliers and referencing specific product data sheets is recommended.