Hastelloy alloy X,，1

### **Hastelloy® Alloy X (UNS N06002) - Nickel-Chromium-Iron-Molybdenum Superalloy** #### **Overview** **Hastelloy® Alloy X** is a nickel-chromium-iron-molybdenum superalloy specifically designed for high-temperature service up to 1200°C (2200°F). This solid-solution strengthened alloy offers an outstanding combination of oxidation resistance, high-temperature strength, and fabricability, making it one of the most versatile high-temperature materials for extreme environment applications in aerospace, industrial heating, and power generation industries. --- #### **Chemical Composition (Weight %)** | Element | Content (%) | Function | |---------|-------------|-----------| | **Nickel (Ni)** | **Balance** | **Base element providing high-temperature stability** | | **Chromium (Cr)** | **20.5-23.0** | **Primary oxidation resistance through Cr₂O₃ scale formation** | | **Iron (Fe)** | **17.0-20.0** | **Cost-effective matrix element and solid solution strengthener** | | **Molybdenum (Mo)** | **8.0-10.0** | **Solid solution strengthening and creep resistance** | | **Cobalt (Co)** | **0.50-2.50** | **Controlled for specific property enhancement** | | **Tungsten (W)** | **0.20-1.00** | **Additional solid solution strengthening** | | **Manganese (Mn)** | **≤ 1.00** | **Deoxidizer and sulfur control** | | **Silicon (Si)** | **≤ 1.00** | **Enhances oxidation resistance** | | **Aluminum (Al)** | **≤ 0.50** | **Controlled impurity** | | **Carbon (C)** | **0.05-0.15** | **Controlled for carbide strengthening** | | **Boron (B)** | **≤ 0.010** | **Grain boundary strengthening** | | **Phosphorus (P)** | **≤ 0.04** | **Controlled impurity** | | **Sulfur (S)** | **≤ 0.03** | **Controlled impurity** | --- #### **Physical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | **8.28 g/cm³ (0.299 lb/in³)** | | **Melting Range** | **1260-1355°C (2300-2475°F)** | | **Electrical Resistivity** | **1.18 μΩ·m** | | **Thermal Conductivity** | **11.9 W/m·K (at 100°C)** | | **Coefficient of Thermal Expansion** | **12.5 μm/m·°C (20-300°C)** | | **Specific Heat Capacity** | **455 J/kg·K** | | **Magnetic Permeability** | **< 1.02 (slightly magnetic due to iron content)** | --- #### **Mechanical Properties (Annealed Condition)** | Temperature | Tensile Strength | Yield Strength (0.2%) | Elongation | |-------------|------------------|---------------------|------------| | **Room Temperature** | **760 MPa (110 ksi)** | **360 MPa (52 ksi)** | **48%** | | **650°C (1200°F)** | **620 MPa (90 ksi)** | **310 MPa (45 ksi)** | **42%** | | **815°C (1500°F)** | **415 MPa (60 ksi)** | **275 MPa (40 ksi)** | **45%** | | **980°C (1800°F)** | **195 MPa (28 ksi)** | **165 MPa (24 ksi)** | **50%** | --- #### **High-Temperature Performance Characteristics** | Property | Performance | Temperature Limit | |-------------|-------------|-------------------| | **Oxidation Resistance** | **Excellent** | **Up to 1200°C (2200°F)** | | **Creep Strength** | **Outstanding** | **Long-term service at 980°C** | | **Thermal Fatigue Resistance** | **Excellent** | **Cyclic temperature applications** | | **Structural Stability** | **Superior** | **Resists sigma phase formation** | --- #### **Key Characteristics & Applications** **Key Characteristics:** - **Exceptional Oxidation Resistance**: Superior performance in high-temperature oxidizing environments - **Excellent High-Temperature Strength**: Maintains mechanical properties up to 1200°C - **Outstanding Thermal Stability**: Resists embrittlement during long-term exposure - **Superior Creep Resistance**: Excellent stress-rupture properties - **Excellent Fabricability**: Can be readily formed, welded, and machined - **Good Environmental Resistance**: Performs well in various corrosive atmospheres **Typical Applications:** - **Aerospace Industry**: Gas turbine combustion chambers, afterburner components, spray bars - **Industrial Gas Turbines**: Combustion cans, transition pieces, hot gas path components - **Heat Treating Industry**: Radiant tubes, retorts, furnace fixtures, baskets - **Chemical Processing**: High-temperature reactors, reformer tubes, heat exchangers - **Power Generation**: Gas turbine components, boiler parts, superheater supports - **Petrochemical**: Pyrolysis furnace components, transfer line exchangers - **Pollution Control**: Thermal oxidizer components, incinerator parts --- #### **International Standards & Specifications** | Standard | Designation | Description | |----------|-------------|-------------| | **AWS** | **A5.14** | **Nickel Alloy Bare Welding Electrodes and Rods (ERNiCrMo-2)** | | **AWS** | **A5.11** | **Nickel Alloy Covered Welding Electrodes (ENiCrMo-2)** | | **ASME** | **SFA 5.11** | **Nickel Alloy Covered Electrodes** | | **ASME** | **SFA 5.14** | **Nickel Alloy Bare Electrodes and Rods** | | **AMS** | **5755** | **Bars, Forgings, and Rings** | | **AMS** | **5786** | **Welding Wire** | | **AMS** | **5787** | **Sheet, Strip, and Plate** | | **UNS** | **N06002** | **Unified Numbering System** | --- #### **Manufacturing & Processing** **Available Forms:** - **Sheet and Plate**: 0.5 mm to 150 mm thickness - **Bar and Rod**: 5 mm to 400 mm diameter - **Pipe and Tube**: 10 mm to 800 mm diameter - **Welding Products**: Electrodes, wires, and rods per AWS/ASME specifications - **Forgings and Rings**: Custom components for critical applications **Processing Guidelines:** - **Hot Working**: 1150-1200°C (2100-2190°F) - **Cold Working**: Excellent capability with intermediate annealing - **Solution Annealing**: 1175-1200°C (2150-2190°F) with rapid cooling - **Welding**: Excellent weldability using AWS A5.14/A5.11 compliant products - **Machining**: Good machinability using standard techniques for nickel alloys --- #### **Quality Control & Testing** - **Chemical Analysis**: Per ASTM E1473 standards - **Mechanical Testing**: Per ASTM E8/E8M and E21 - **Creep and Stress Rupture**: Per ASTM E139 - **Non-Destructive Testing**: UT, RT, PT, ET as required - **Metallographic Examination**: Per ASTM E3 and E112 - **Welding Qualification**: Per applicable AWS and ASME standards - **High-Temperature Testing**: Oxidation and thermal stability evaluation --- #### **Comparison with Competitive Alloys** | Property | Alloy X | Alloy 625 | Alloy 617 | Alloy 800H | |----------|---------|-----------|-----------|------------| | **Max Service Temperature** | **1200°C** | **1095°C** | **1095°C** | **1150°C** | | **Oxidation Resistance** | **Excellent** | Very Good | Very Good | Good | | **Creep Strength** | **Outstanding** | Good | Good | Very Good | | **Fabricability** | **Excellent** | Excellent | Good | Excellent | --- #### **Summary** **Hastelloy® Alloy X (UNS N06002)** represents one of the most versatile and widely used high-temperature nickel-based superalloys, offering an exceptional balance of oxidation resistance, high-temperature strength, and fabricability. Its comprehensive coverage by major international standards including AWS A5.14, AWS A5.11, ASME SFA 5.11, ASME SFA 5.14, AMS 5755, AMS 5786, and AMS 5787 ensures consistent quality and reliable performance across various manufacturing processes and applications. The alloy's proven track record in aerospace, power generation, and industrial heating applications, combined with its excellent weldability and good mechanical properties, makes it a preferred choice for components operating under the most demanding high-temperature conditions. Supported by decades of successful service experience and rigorous quality standards, Alloy X continues to be the benchmark material for applications requiring reliable performance in extreme thermal environments where oxidation resistance and structural integrity are paramount.

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 3253 gallon liquid totes Special package is available on request.