Haynes 214 alloy,UNS N07214, DIN 17744 No.2.4646，1

### **Haynes 214® Alloy (UNS N07214) - High-Temperature Oxidation-Resistant Nickel-Based Alloy** #### **Overview** **Haynes 214® Alloy** is a premium nickel-chromium-aluminum-iron alloy specifically engineered for exceptional oxidation resistance in high-temperature environments up to 1200°C (2200°F). The alloy's unique composition, featuring a carefully balanced aluminum content combined with yttrium, enables the formation of a highly protective and adherent aluminum oxide (Al₂O₃) scale that provides superior protection against cyclic oxidation and thermal shock conditions. --- #### **Chemical Composition (Weight %)** | Element | Content (%) | Function | |---------|-------------|-----------| | **Nickel (Ni)** | **Balance** | **Austenitic matrix formation and base corrosion resistance** | | **Chromium (Cr)** | **15.0-17.0** | **Forms protective Cr₂O₃ scale and enhances oxidation resistance** | | **Aluminum (Al)** | **4.0-5.0** | **Key element for protective Al₂O₃ scale formation** | | **Iron (Fe)** | **2.0-4.0** | **Solid solution strengthening and cost optimization** | | **Yttrium (Y)** | **0.01-0.10** | **Enhances oxide scale adhesion and spallation resistance** | | **Carbon (C)** | **≤ 0.05** | **Controlled for carbide formation** | | **Zirconium (Zr)** | **≤ 0.10** | **Grain boundary strengthening** | | **Manganese (Mn)** | **≤ 0.50** | **Deoxidizer during melting** | | **Silicon (Si)** | **≤ 0.20** | **Controlled impurity** | --- #### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | **8.05 g/cm³ (0.291 lb/in³)** | | **Melting Range** | **1375-1425°C (2507-2597°F)** | | **Electrical Resistivity** | **1.25 μΩ·m** | | **Thermal Conductivity** | **13.5 W/m·K (at 100°C)** | | **Coefficient of Thermal Expansion** | **14.8 μm/m·°C (20-1000°C)** | | **Specific Heat Capacity** | **460 J/kg·K** | | **Tensile Strength (Room Temp)** | **830 MPa (120 ksi)** | | **Yield Strength (0.2% Offset)** | **415 MPa (60 ksi)** | | **Elongation** | **35%** | | **Modulus of Elasticity** | **215 GPa (31.2 × 10⁶ psi)** | | **Creep Rupture Strength (980°C)** | **Excellent long-term stability** | --- #### **High-Temperature Performance Characteristics** | Property | Performance Rating | Temperature Limit | |-------------|-------------------|-------------------| | **Oxidation Resistance** | **Exceptional** | **1200°C (2200°F)** | | **Cyclic Oxidation** | **Excellent** | **1150°C (2100°F)** | | **Carburization Resistance** | **Good** | **1100°C (2012°F)** | | **Chlorine Attack Resistance** | **Good** | **980°C (1800°F)** | | **Thermal Fatigue Resistance** | **Excellent** | **Wide temperature ranges** | --- #### **Key Characteristics & Applications** **Key Characteristics:** - **Outstanding Oxidation Resistance**: Superior performance in high-temperature oxidizing environments - **Excellent Scale Adhesion**: Yttrium-modified alumina scale resists spallation during thermal cycling - **Good High-Temperature Strength**: Maintains mechanical properties at elevated temperatures - **Thermal Stability**: Resists microstructural degradation during long-term exposure - **Good Fabricability**: Can be formed and welded using appropriate techniques - **Resistance to Sulfur Attack**: Performs well in sulfur-containing atmospheres **Typical Applications:** - **Industrial Furnaces**: Heat treatment fixtures, radiant tubes, and combustion components - **Aerospace**: Combustion liners, afterburner components, and turbine seals - **Power Generation**: Heat exchangers, boiler components, and burner parts - **Chemical Processing**: High-temperature reactors and reformer tubes - **Heat Treating Industry**: Baskets, trays, and fixtures for high-temperature operations - **Glass Manufacturing**: Handling fixtures and processing components - **Petrochemical**: Pyrolysis hardware and transfer line components --- #### **International Standards & Specifications** | Standard | Designation | Description | |----------|-------------|-------------| | **UNS** | **N07214** | **Unified Numbering System** | | **DIN** | **17744 No.2.4646** | **German Standard Designation** | | **ASTM** | **B435** | **Plate, Sheet, and Strip** | | **ASTM** | **B366** | **Factory-Made Wrought Fittings** | | **AMS** | **5872** | **Aerospace Material Specification** | --- #### **Manufacturing & Processing** **Available Forms:** - **Plate and Sheet**: 0.5 mm to 50 mm thickness - **Bar and Rod**: 5 mm to 200 mm diameter - **Pipe and Tube**: 10 mm to 300 mm OD - **Wire and Strip**: For specialized applications - **Forgings**: Custom components and fixtures **Processing Guidelines:** - **Hot Working**: 1150-1200°C (2100-2190°F) - **Cold Working**: Good capability with intermediate annealing - **Solution Annealing**: 1150-1175°C (2100-2147°F) with rapid cooling - **Welding**: Compatible with GTAW and GMAW using matching filler metals - **Machining**: Requires appropriate tooling and techniques --- #### **Quality Control & Testing** - **Chemical Analysis**: Per ASTM E1473 standards - **Mechanical Testing**: Tensile and hardness testing per ASTM E8/E8M - **Metallographic Examination**: Microstructure evaluation per ASTM E3 - **High-Temperature Testing**: Oxidation and creep testing per applicable standards - **Non-Destructive Testing**: UT, RT, and PT as required --- #### **Comparison with Competitive Alloys** | Property | Haynes 214 | Alloy 600 | Alloy 625 | Alloy X | |----------|------------|-----------|-----------|---------| | **Max Oxidation Temp** | **1200°C** | 1090°C | 1090°C | 1150°C | | **Scale Adhesion** | **Excellent** | Good | Good | Very Good | | **Fabricability** | **Good** | Excellent | Excellent | Good | | **Cost Effectiveness** | **High** | Medium | Medium | High | --- #### **Summary** **Haynes 214® Alloy (UNS N07214)** represents a significant advancement in high-temperature oxidation-resistant materials, offering unparalleled performance in severe oxidizing environments up to 1200°C. Its unique yttrium-modified alumina scale provides exceptional protection against cyclic oxidation and thermal shock, making it the material of choice for demanding applications in heat treatment, aerospace, and power generation industries. The alloy's comprehensive standardization across international specifications, combined with proven service performance and good fabricability, ensures reliable long-term performance in the most aggressive high-temperature environments. Haynes 214 continues to be specified for critical applications where conventional heat-resistant alloys cannot provide adequate service life or reliability.

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 3240 gallon liquid totes Special package is available on request.