Product Code : NI-NI21-CU-CU
Alloy 800H,Incoloy 800H,N08810is available in Bar (Round bar, Flat bar), Ribbon, Wire, Rods, Tube, Pipe, Foil, Plate, Sheet, Strip and Forging Stock.
### **Technical Datasheet: Alloy 800H (Incoloy 800H, UNS N08810)**
**Overview**
Incoloy 800H (Alloy 800H, UNS N08810) is the controlled-carbon version of Alloy 800, specifically designed for enhanced high-temperature strength and creep resistance. This nickel-iron-chromium alloy features optimized carbon and grain size control, making it particularly suitable for long-term service in high-temperature applications above 540°C (1000°F).
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### **Technical Datasheet: Alloy 800H (Incoloy 800H, UNS N08810)**
**Overview**
Incoloy 800H (Alloy 800H, UNS N08810) is the controlled-carbon version of Alloy 800, specifically designed for enhanced high-temperature strength and creep resistance. This nickel-iron-chromium alloy features optimized carbon and grain size control, making it particularly suitable for long-term service in high-temperature applications above 540°C (1000°F).
### **Technical Datasheet: Alloy 800H (Incoloy 800H, UNS N08810)**
**Overview**
Incoloy 800H (Alloy 800H, UNS N08810) is the controlled-carbon version of Alloy 800, specifically designed for enhanced high-temperature strength and creep resistance. This nickel-iron-chromium alloy features optimized carbon and grain size control, making it particularly suitable for long-term service in high-temperature applications above 540°C (1000°F).
**Key Characteristics**
- **Excellent high-temperature strength and creep resistance**
- **Enhanced resistance to oxidation and carburization**
- **Good microstructural stability at elevated temperatures**
- **Resistance to sulfur corrosion and reducing atmospheres**
- **Controlled grain size for optimal high-temperature performance**
--- #### **1. Chemical Composition (Weight %)**
| Element | Composition (%) |
|---------|-----------------|
| **Nickel (Ni)** | 30.0-35.0 |
| **Chromium (Cr)** | 19.0-23.0 |
| **Iron (Fe)** | Balance |
| **Carbon (C)** | 0.05-0.10 |
| **Aluminum (Al)** | 0.15-0.60 |
| **Titanium (Ti)** | 0.15-0.60 |
| **Manganese (Mn)** | ≤1.50 |
| **Silicon (Si)** | ≤1.00 |
| **Copper (Cu)** | ≤0.75 |
| **Sulfur (S)** | ≤0.015 |
*Note: The controlled carbon content (0.05-0.10%) and Al+Ti content are key to its high-temperature performance.*
2. Physical Properties**
| Property | Value |
|----------|-------|
| **Density** | 7.94 g/cm³ |
| **Melting Range** | 1350-1400°C |
| **Thermal Conductivity** | 11.2 W/m·K |
| **Specific Heat** | 500 J/kg·K |
| **Coefficient of Thermal Expansion** | 14.4 μm/m·°C |
| **Modulus of Elasticity** | 195 GPa |
3. Mechanical Properties**
**Room Temperature:** -
**Tensile Strength**: 450-690 MPa
- **Yield Strength (0.2% Offset)**: 170-345 MPa
- **Elongation**: 30-45% **High Temperature Creep Properties:**
- **Excellent creep rupture strength** at temperatures above 600°C
- **Minimum creep rate** superior to standard Alloy 800
--- #### **4. International Standards**
| Product Form | Standard |
|--------------|----------|
| **Plate, Sheet, Strip** | ASTM B409, ASME SB409 |
| **Bar & Forgings** | ASTM B408, ASME SB408 |
| **Seamless Tubing** | ASTM B163, B407 |
| **Pipe & Tubes** | ASTM B564, B517 |
| **European Standard** | EN 10095 |
| **Unified Numbering** | UNS N08810 |
--- #### **5. Applications**
**Petrochemical Industry:**
- Steam methane reformer tubes
- Ethylene furnace tubes
- Pyrolysis coils
- Heater tubes and pigtails
**Heat Treatment Industry:**
- Radiant tubes and charge baskets
- Furnace retorts and muffles
- Heat treatment fixtures
- Roller hearth furnace components
**Power Generation:**
- Heat exchangers and superheaters
- Steam generators
- Gas turbine components
- Nuclear reactor core components
**Other Applications:**
- Thermal cracking equipment
- Catalyst support grids in ammonia plants
- High-temperature heat exchangers
--- **Summary**
Incoloy 800H (UNS N08810) represents the high-temperature variant of the Alloy 800 series, with controlled carbon content and heat treatment to ensure optimal high-temperature performance. Its enhanced creep rupture strength and excellent resistance to oxidation and carburization make it particularly valuable for long-term service in petrochemical processing, heat treatment equipment, and power generation applications. The alloy's proven performance in temperatures ranging from 540°C to 980°C has established it as a reliable material choice for critical high-temperature components, supported by comprehensive international standards including ASME Boiler and Pressure Vessel Code approval.
Packing of Incoloy 800H (UNS N08810)
Standard Packing:
Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1644 gallon liquid totes Special package is available on request.
