Alloy 800H,Incoloy 800H Rod,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

### **Product Introduction: Alloy 800H / Incoloy 800H Rod (UNS N08810)** **Alloy 800H Rod** (commercially known as **Incoloy 800H Rod** and designated as **UNS N08810**) is a nickel-iron-chromium superalloy supplied in the form of round bars, hexagons, or other shaped profiles. It is the high-carbon, coarse-grain version of standard Alloy 800, specifically engineered for superior performance in high-temperature environments. The "H" designation signifies its optimized composition for high-temperature service, featuring controlled carbon content and a specific annealing heat treatment that develops a coarse grain structure. This structure is essential for providing exceptional creep and stress-rupture strength, making Alloy 800H rod a preferred material for machined components, fasteners, and structural supports in demanding applications. --- ### **Chemical Composition** The chemical composition of Alloy 800H Rod (N08810) is strictly controlled to ensure consistent high-temperature performance. The typical composition ranges are as follows: | Element | Content (%) (Per ASTM B408) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | 30.0 - 35.0 | Imparts austenitic structure and fundamental resistance to oxidation and carburization. | | **Chromium (Cr)** | 19.0 - 23.0 | Confers resistance to oxidation, sulfidation, and other high-temperature corrosives. | | **Iron (Fe)** | ≥ 39.5 | Balance; forms the base of the alloy matrix. | | **Carbon (C)** | 0.05 - 0.10 | **Critical for "H" grade.** Strengthens the alloy at high temperatures via solid solution and carbide formation, directly enhancing creep resistance. | | **Aluminum (Al)** | 0.15 - 0.60 | Combines with Titanium to form strengthening phases and improves oxidation resistance. | | **Titanium (Ti)** | 0.15 - 0.60 | Combines with Aluminum to provide strengthening via gamma-prime formation. | | **Manganese (Mn)** | ≤ 1.50 | Aids in hot workability and combats sulfur embrittlement. | | **Copper (Cu)** | ≤ 0.75 | - | | **Silicon (Si)** | ≤ 1.00 | Improves resistance to oxidation and carburization. | | **Sulfur (S)** | ≤ 0.015 | Impurity, kept low to prevent hot shortness. | *Note: The ratio of (Al + Ti) is typically controlled to be ≥ 0.85% for N08810.* --- ### **Physical Properties** | Property | Value / Condition | | :--- | :--- | | **Density** | 0.29 lb/in³ (8.03 g/cm³) | | **Melting Range** | 2470-2520°F (1354-1384°C) | | **Specific Heat** | 0.11 Btu/lb·°F (460 J/kg·K) at 70°F (21°C) | | **Thermal Expansion** | 9.2 x 10⁻⁶ /°F (16.6 x 10⁻⁶ /K) | 70-1200°F (20-650°C) | | **Thermal Conductivity** | 9.0 Btu/hr·ft·°F (15.6 W/m·K) at 70°F (21°C) | | **Electrical Resistivity** | 45.8 μΩ·in (116 μΩ·cm) at 70°F (21°C) | | **Modulus of Elasticity** | 29.1 x 10⁶ psi (201 GPa) at 70°F (21°C) | | **Magnetic Permeability** | Typically < 1.05 (Essentially non-magnetic) | --- ### **Mechanical Properties (Typical for Rod & Bar)** Mechanical properties for rod products are specified in standards like ASTM B408 for hot-finished or cold-finished bars. The following are typical minimum requirements for the annealed condition. **ASTM B408 - Hot Finished & Cold Finished Rod/Bar** * **Tensile Strength:** 65 ksi (450 MPa) min * **Yield Strength (0.2% Offset):** 25 ksi (170 MPa) min * **Elongation:** 30% min *The primary value of Alloy 800H rod is its retention of these mechanical properties at elevated temperatures, offering excellent long-term creep and stress-rupture strength up to 1500°F (815°C).* --- ### **International Standards for Rod Product** Alloy 800H / N08810 rod is covered by several international standards specifying requirements for bar and rod forms. | Standard Type | Standard Number | Title / Description | | :--- | :--- | :--- | | **UNS** | **N08810** | Unified Numbering System designation. | | **ASTM** | **B408 / B408M** | Standard Specification for Nickel-Iron-Chromium Alloy Rod and Bar. | | **ASME** | **SB-408** | Equivalent to ASTM B408, approved for use in ASME Boiler and Pressure Vessel Code construction. | | **EN / DIN** | **1.4958 / 1.4876** | European material numbers (X5NiCrAlTi31-20 / X8NiCrAlTi32-21). 1.4876 is often the direct equivalent for rod. | | **ISO** | **6207** | Designation for wrought products like rod and bar. | --- ### **Product Applications for Rod Form** The rod form of Alloy 800H is typically machined into critical components for high-temperature service. Key applications include: 1. **Petrochemical & Chemical Processing:** * **Studs, Bolts, and Nuts:** High-strength fasteners for reformer and cracker furnace assemblies. * **Pigtail Fittings:** Machined from rod for connecting reformer tubes to headers. * **Valve Components:** Stems, seats, and trim parts for high-temperature service. * **Support Rods and Hangers:** For internal furnace components. 2. **Power Generation:** * **Fasteners:** For turbine casings, heat exchangers, and high-pressure piping systems. * **Structural Supports:** Machined brackets and pins used in boiler sections and nuclear reactor components. * **Spacers and Insulator Pins.** 3. **Industrial Furnaces & Heat Treatment:** * **Furnace Rolls:** Used in continuous annealing and sintering furnaces. * **Trays and Fixtures:** Machined baskets, grids, and fixtures for carrying parts during heat treatment. * **Radiant Tube Hangers.** 4. **General Engineering:** * Any component requiring a combination of high-temperature strength, corrosion resistance, and good machinability. ### **Key Characteristics Summary** * **Superior Creep & Stress-Rupture Strength:** The primary reason for selecting the "H" grade, especially in rod form for load-bearing components. * **Excellent Machinability:** The rod product form is designed to be readily machined into complex parts using standard techniques. * **Resistance to Oxidation and Carburization:** Withstands aggressive high-temperature atmospheres. * **Good Structural Stability:** Resists embrittlement from sigma phase formation during long-term exposure. * **Essentially Non-Magnetic.** In conclusion, **Alloy 800H / Incoloy 800H Rod (UNS N08810)** is a high-performance engineering material specifically chosen for manufacturing critical load-bearing components that must retain their strength and resist degradation in high-temperature, corrosive environments.

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 1898 gallon liquid totes Special package is available on request.