Alloy 800H,Incoloy 800H Forgings,N08810,E FORU

British Specs:BS 3072 BS 3073 BS 3074 BS 3075 BS 3076 NA15，American Specs:AMS 5766 Bar and Forgings AMS 5871 Sheet, Strip and Plate ASTM B408 ASTM B564 ASTM A240 ASTM A480，German Specs:WS 1.4876 WS 1.4958 WS 1.4959

### **Technical Data Sheet: Alloy 800H / Incoloy 800H Forgings (UNS N08810)** --- #### **1.0 Product Overview** **Alloy 800H Forgings** (commercially known as **Incoloy 800H Forgings**, UNS **N08810**) are high-integrity components produced through controlled forging processes from a nickel-iron-chromium superalloy specifically engineered for extreme temperature and high-stress applications. The "H" designation indicates optimized chemistry with elevated carbon content (0.05-0.10%) and specialized thermal-mechanical processing that develops a directional grain flow pattern, delivering superior mechanical properties and enhanced creep resistance compared to cast or fabricated alternatives. These forgings maintain exceptional structural integrity under severe thermal and mechanical loading conditions, making them ideal for critical components in demanding industrial applications. --- #### **2.0 Chemical Composition** | Element | Content (%) (Per ASTM B564) | Function | |---------|-----------------------------------|----------| | **Nickel (Ni)** | 30.0 - 35.0 | Austenitic matrix formation, oxidation and carburization resistance | | **Chromium (Cr)** | 19.0 - 23.0 | High-temperature oxidation and sulfidation resistance | | **Iron (Fe)** | ≥ 39.5 | Balance element, provides alloy matrix | | **Carbon (C)** | 0.05 - 0.10 | **Critical for "H" grade** - enhances creep rupture strength through carbide stabilization | | **Aluminum (Al)** | 0.15 - 0.60 | Oxidation resistance through protective scale formation | | **Titanium (Ti)** | 0.15 - 0.60 | Stabilization and high-temperature strengthening | | **Manganese (Mn)** | ≤ 1.50 | Hot workability improvement and sulfur control | | **Copper (Cu)** | ≤ 0.75 | - | | **Silicon (Si)** | ≤ 1.00 | Enhances oxidation and carburization resistance | | **Sulfur (S)** | ≤ 0.015 | Impurity control - minimized for improved hot workability | *Note: Aluminum + Titanium content ≥ 0.85% for N08810 specification* --- #### **3.0 Physical Properties** | Property | Metric Value | Imperial Value | Condition | |----------|--------------|----------------|-----------| | **Density** | 8.03 g/cm³ | 0.29 lb/in³ | At 20°C (68°F) | | **Melting Range** | 1354-1384°C | 2470-2520°F | - | | **Specific Heat** | 460 J/kg·K | 0.11 Btu/lb·°F | At 21°C (70°F) | | **Mean Coefficient of Thermal Expansion** | 16.6 × 10⁻⁶ /K | 9.2 × 10⁻⁶ /°F | 20-650°C (70-1200°F) | | **Thermal Conductivity** | 15.6 W/m·K | 9.0 Btu·in/hr·ft²·°F | At 21°C (70°F) | | **Electrical Resistivity** | 116 μΩ·cm | 45.8 μΩ·in | At 21°C (70°F) | | **Modulus of Elasticity** | 201 GPa | 29.1 × 10⁶ psi | At 21°C (70°F) | | **Magnetic Permeability** | < 1.05 | < 1.05 | Essentially non-magnetic | --- #### **4.0 Mechanical Properties** **ASTM B564 - Forgings (Solution Annealed & Quenched)** - **Tensile Strength:** 450 MPa min | 65 ksi min - **Yield Strength (0.2% Offset):** 170 MPa min | 25 ksi min - **Elongation:** 30% minimum - **Reduction of Area:** 30% minimum **Elevated Temperature Properties** - **Maximum Service Temperature:** 815°C (1500°F) continuous - **Creep Strength:** Superior long-term performance under stress - **Stress Rupture:** Excellent endurance at elevated temperatures - **Thermal Fatigue Resistance:** Outstanding performance under cycling conditions --- #### **5.0 International Standards & Specifications** | Standard Type | Standard Number | Description | |---------------|-----------------|-------------| | **UNS** | **N08810** | Unified Numbering System | | **ASTM** | **B564** | Nickel Alloy Forgings | | **ASME** | **SB-564** | ASME Boiler and Pressure Vessel Code | | **ASTM** | **A788** | Standard Specification for Steel Forgings, General Requirements | | **EN** | **10204** | Metallic Products - Types of Inspection Documents | | **EN/DIN** | **1.4876** | Material Number X8NiCrAlTi32-21 | --- #### **6.0 Forging Processes & Capabilities** **Manufacturing Methods** - **Open Die Forgings:** Large components up to 5000 kg - **Closed Die Forgings:** Complex shapes with minimal machining - **Ring Rolled Forgings:** Seamless rings up to 4000 mm diameter - **Press Forgings:** Controlled deformation for optimal grain flow **Forging Temperature Ranges** - **Heating Temperature:** 1150-1200°C (2100-2190°F) - **Forging Start Temperature:** 1100-1150°C (2010-2100°F) - **Forging Finish Temperature:** ≥ 950°C (1740°F) **Heat Treatment** - **Solution Annealing:** 980-1065°C (1800-1950°F) - **Quenching Medium:** Water or rapid air cooling - **Stress Relieving:** For complex geometries and machined components --- #### **7.0 Product Applications** **Petrochemical Industry** - Steam methane reformer components - Ethylene cracking furnace parts - High-temperature reactors and vessels - Reform outlet manifolds and headers - Catalyst support grids and beams **Power Generation** - Turbine discs and shafts - Valve bodies and steam chests - Pump casings and impellers - Nuclear reactor components - Heat exchanger headers and tubesheets **Aerospace & Defense** - Jet engine components - Rocket motor parts - High-temperature fasteners - Afterburner components **Industrial Equipment** - High-temperature furnace fixtures - Heat treatment retorts and muffles - Industrial heating elements - Thermal processing hardware **Oil & Gas** - Wellhead components - Christmas tree fittings - High-pressure valve bodies - Downhole tool components --- #### **8.0 Design Advantages of Forgings** **Superior Mechanical Properties** - Directional grain flow for optimized strength - Elimination of internal defects and porosity - Improved impact and fatigue resistance - Consistent properties throughout cross-section **Enhanced Reliability** - Homogeneous microstructure - Reduced inspection requirements - Predictable failure modes - Extended service life **Manufacturing Benefits** - Near-net shape capabilities - Reduced machining time and cost - Excellent surface integrity - Consistent batch-to-batch quality --- #### **9.0 Quality Assurance & Testing** **Non-Destructive Examination** - **Ultrasonic Testing (UT):** Per ASTM A388 - **Liquid Penetrant Testing (PT):** Per ASTM E165 - **Magnetic Particle Testing (MT):** Limited application due to non-magnetic nature - **Radiographic Testing (RT):** Per ASTM E94 for critical sections **Destructive Testing** - **Tensile Testing:** At room and elevated temperatures - **Impact Testing:** Charpy V-notch as required - **Hardness Testing:** Multiple locations - **Microstructural Examination:** Grain size, inclusion rating **Certification & Documentation** - **Material Test Reports:** Full traceability to melt heat - **Chemical Analysis:** Ladle and product verification - **Mechanical Test Reports:** Location-specific testing - **Heat Treatment Charts:** Time-temperature records - **NDT Reports:** Comprehensive examination records --- #### **10.0 Technical Specifications** **Size Range Capabilities** - **Weight Range:** 1 kg to 5000 kg - **Maximum Dimensions:** 3000 mm length, 1500 mm diameter - **Ring Forgings:** Up to 4000 mm OD × 500 mm wall height **Surface Finish** - **As-Forged:** Scale present, rough surface - **Machined:** Various surface finishes available - **Special:** Pickled, ground, or polished as required **Dimensional Tolerances** - **Commercial Forgings:** ASTM A788 Standard - **Precision Forgings:** Customer-specific requirements - **Machining Allowances:** Optimized for cost-effectiveness --- ### **Conclusion** **Alloy 800H / Incoloy 800H Forgings (UNS N08810)** represent the premium product form for critical high-temperature components where reliability, structural integrity, and long-term performance are paramount. The forging process enhances the inherent advantages of the alloy, providing superior mechanical properties, directional strength characteristics, and proven reliability in the most demanding industrial applications. With comprehensive quality assurance and international certification, these forgings deliver unmatched performance in petrochemical, power generation, and aerospace applications where failure is not an option.

Packing of 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 1906 gallon liquid totes Special package is available on request.