Haynes 230 alloy,UNS N06230, AMS 5878, AMS 5891, DIN 17742 No.2.4733，1

### **Haynes 230® Alloy (UNS N06230) - High-Temperature Nickel-Chromium-Tungsten-Molybdenum Alloy** #### **Overview** **Haynes 230® Alloy** is an advanced nickel-chromium-tungsten-molybdenum alloy specifically engineered for exceptional high-temperature strength and outstanding resistance to oxidizing environments up to 1150°C (2100°F). The alloy's optimized composition provides an excellent combination of creep strength, thermal stability, and fabricability, making it one of the most versatile solid-solution strengthened superalloys for demanding high-temperature applications. --- #### **Chemical Composition (Weight %)** | Element | Content (%) | Function | |---------|-------------|-----------| | **Nickel (Ni)** | **Balance** | **Austenitic matrix formation and base corrosion resistance** | | **Chromium (Cr)** | **20.0-24.0** | **Primary oxidation resistance through Cr₂O₃ scale formation** | | **Tungsten (W)** | **13.0-15.0** | **Solid solution strengthening and stability enhancement** | | **Molybdenum (Mo)** | **1.0-3.0** | **Additional solid solution strengthening** | | **Cobalt (Co)** | **≤ 5.0** | **Controlled impurity** | | **Iron (Fe)** | **≤ 3.0** | **Controlled impurity** | | **Manganese (Mn)** | **0.30-1.00** | **Sulfur control and deoxidation** | | **Silicon (Si)** | **0.25-0.75** | **Oxidation resistance enhancement** | | **Aluminum (Al)** | **0.20-0.50** | **Forms protective Al₂O₃ sub-scale** | | **Carbon (C)** | **0.05-0.15** | **Controlled for carbide strengthening** | | **Lanthanum (La)** | **0.005-0.050** | **Enhances oxide scale adhesion** | | **Boron (B)** | **0.015 max** | **Grain boundary strengthening** | --- #### **Physical & Mechanical Properties** | Property | Value / Description | |----------|---------------------| | **Density** | **8.97 g/cm³ (0.324 lb/in³)** | | **Melting Range** | **1300-1370°C (2370-2500°F)** | | **Electrical Resistivity** | **1.24 μΩ·m** | | **Thermal Conductivity** | **11.2 W/m·K (at 100°C)** | | **Coefficient of Thermal Expansion** | **12.4 μm/m·°C (20-300°C)** | | **Specific Heat Capacity** | **450 J/kg·K** | | **Tensile Strength (Room Temp)** | **795 MPa (115 ksi)** | | **Yield Strength (0.2% Offset)** | **360 MPa (52 ksi)** | | **Elongation** | **45%** | | **Modulus of Elasticity** | **214 GPa (31.0 × 10⁶ psi)** | | **Creep Rupture Strength (980°C)** | **34 MPa (5 ksi) for 1000 hours** | --- #### **High-Temperature Performance Characteristics** | Property | Performance Rating | Temperature Limit | |-------------|-------------------|-------------------| | **Oxidation Resistance** | **Excellent** | **1150°C (2100°F)** | | **Creep Strength** | **Outstanding** | **980°C (1800°F)** | | **Thermal Stability** | **Excellent** | **Long-term exposure up to 1100°C** | | **Cyclic Oxidation Resistance** | **Very Good** | **1100°C (2012°F)** | | **Carburization Resistance** | **Good** | **1150°C (2100°F)** | --- #### **Key Characteristics & Applications** **Key Characteristics:** - **Exceptional High-Temperature Strength**: Superior creep and rupture properties - **Outstanding Oxidation Resistance**: Lanthanum-stabilized chromia scale provides excellent protection - **Excellent Thermal Stability**: Resists formation of detrimental phases during long-term exposure - **Good Fabricability**: Can be readily formed and welded using standard techniques - **Resistance to Nitriding**: Performs well in nitrogen-containing atmospheres - **Good Thermal Fatigue Resistance**: Suitable for cyclic temperature applications **Typical Applications:** - **Aerospace Industry**: Combustion chambers, transition ducts, afterburner components - **Industrial Gas Turbines**: Combustion liners, transition pieces, nozzle guide vanes - **Heat Treating Industry**: Furnace fixtures, radiant tubes, retorts, and baskets - **Power Generation**: Heat exchangers, superheater supports, boiler components - **Chemical Processing**: High-temperature reactors, reformer tubes, pyrolysis hardware - **Nuclear Industry**: Heat exchangers and high-temperature components - **Petrochemical**: Steam methane reformer components --- #### **International Standards & Specifications** | Standard | Designation | Description | |----------|-------------|-------------| | **UNS** | **N06230** | **Unified Numbering System** | | **AMS** | **5878** | **Plate, Sheet, and Strip** | | **AMS** | **5891** | **Bar and Forging Stock** | | **DIN** | **17742 No.2.4733** | **German Standard Designation** | | **ASTM** | **B435** | **Plate, Sheet, and Strip** | | **ASTM** | **B622** | **Seamless Pipe and Tube** | | **ASTM** | **B366** | **Fittings** | | **ASME** | **Code Case** | **Acceptance for pressure vessel applications** | --- #### **Manufacturing & Processing** **Available Forms:** - **Plate and Sheet**: 0.5 mm to 100 mm thickness - **Bar and Rod**: 5 mm to 300 mm diameter - **Pipe and Tube**: 10 mm to 600 mm OD - **Wire and Strip**: For specialized applications - **Forgings**: Custom components and fixtures - **Fittings**: Flanges, elbows, and other piping components **Processing Guidelines:** - **Hot Working**: 1150-1200°C (2100-2190°F) - **Cold Working**: Good capability with intermediate annealing at 1175°C - **Solution Annealing**: 1175-1250°C (2150-2280°F) with rapid cooling - **Welding**: Excellent weldability using GTAW, GMAW with AWS A5.14 ERNiCrWMo-1 - **Machining**: Similar to other nickel-based superalloys --- #### **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**: Creep and stress rupture testing per ASTM E139 - **Non-Destructive Testing**: UT, RT, PT, and ET as required --- #### **Comparison with Competitive Alloys** | Property | Haynes 230 | Alloy 617 | Alloy X | Alloy 625 | |----------|------------|-----------|---------|-----------| | **Max Service Temperature** | **1150°C** | 1095°C | 1150°C | 1095°C | | **Creep Strength (980°C)** | **Superior** | Good | Very Good | Good | | **Oxidation Resistance** | **Excellent** | Good | Very Good | Good | | **Fabricability** | **Excellent** | Good | Good | Excellent | --- #### **Summary** **Haynes 230® Alloy (UNS N06230)** represents a premier solid-solution strengthened nickel-based superalloy offering an exceptional balance of high-temperature strength, oxidation resistance, and fabricability. Its unique combination of chromium for oxidation resistance, tungsten and molybdenum for solid solution strengthening, and lanthanum for oxide scale adhesion makes it particularly suitable for the most demanding high-temperature applications in aerospace, power generation, and industrial heating. The alloy's comprehensive standardization across major international specifications, including AMS 5878, AMS 5891, and DIN 2.4733, ensures consistent quality and reliable performance. Haynes 230 continues to be specified for critical components where long-term reliability at extreme temperatures is essential, providing an optimal combination of performance and cost-effectiveness for high-temperature applications.

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 3241 gallon liquid totes Special package is available on request.