Haynes Waspaloy™ alloy,AMS 5544，1

### Technical Datasheet: Haynes® Waspaloy™ Alloy (per AMS 5544) **Classification:** Nickel-Based, Gamma-Prime (γ') Strengthened Superalloy **Common Names:** Waspaloy, Alloy W, UNS N07001 **Primary Specification:** AMS 5544 (Sheet, Strip, and Plate) --- #### 1.0 Introduction **Haynes® Waspaloy™** is a premier precipitation-hardenable nickel-based superalloy that has been a cornerstone material in aerospace and gas turbine applications since its development in the 1950s. This alloy is renowned for its **exceptional high-temperature strength, excellent creep resistance, and outstanding thermal stability** at temperatures up to 1600°F (870°C). Waspaloy achieves its superior properties through a combination of solid-solution strengthening and precipitation hardening via gamma prime (γ') phase formation, making it ideal for critical rotating components in demanding thermal environments. --- #### 2.0 Chemical Composition (Weight % per AMS 5544) | Element | Minimum | Maximum | Typical Value | Key Function | |---------|---------|---------|---------------|--------------| | **Nickel (Ni)** | Balance | Balance | 58.0 | Austenitic matrix formation | | **Chromium (Cr)** | 18.0 | 21.0 | 19.5 | Oxidation & corrosion resistance | | **Cobalt (Co)** | 12.0 | 15.0 | 13.5 | Solid-solution strengthening | | **Molybdenum (Mo)** | 3.5 | 5.0 | 4.3 | Solid-solution strengthening | | **Aluminum (Al)** | 1.2 | 1.6 | 1.4 | Gamma' former (Ni₃Al) | | **Titanium (Ti)** | 2.7 | 3.2 | 3.0 | Gamma' former (Ni₃Ti) | | **Iron (Fe)** | - | 2.0 | 1.0 | - | | **Carbon (C)** | 0.02 | 0.10 | 0.06 | Carbide formation | | **Boron (B)** | 0.003 | 0.010 | 0.006 | Grain boundary strengthening | | **Zirconium (Zr)** | 0.02 | 0.12 | 0.05 | Grain boundary stabilization | --- #### 3.0 Physical Properties | Property | Value | Condition/Notes | |----------|-------|-----------------| | **Density** | 8.22 g/cm³ (0.297 lb/in³) | At room temperature | | **Melting Range** | 1330-1360°C (2425-2480°F) | - | | **Thermal Expansion Coefficient** | 12.8 μm/m·°C | 20-100°C | | **Thermal Conductivity** | 11.7 W/m·K | At 100°C | | **Electrical Resistivity** | 124 μΩ·cm | At room temperature | | **Modulus of Elasticity** | 206 GPa (29.9×10⁶ psi) | At room temperature | | **Specific Heat** | 430 J/kg·K | At 20°C | --- #### 4.0 Mechanical Properties (Heat Treated per AMS 5544) **4.1 Room Temperature Properties:** - **Tensile Strength**: 1240-1380 MPa (180-200 ksi) - **Yield Strength (0.2% Offset)**: 795-930 MPa (115-135 ksi) - **Elongation**: 15-25% - **Reduction of Area**: 18-30% **4.2 Elevated Temperature Properties:** | Temperature | Tensile Strength | Yield Strength (0.2% Offset) | Creep Rupture Strength (100h) | |-------------|------------------|-----------------------------|-------------------------------| | 1200°F (650°C) | 965 MPa (140 ksi) | 690 MPa (100 ksi) | 480 MPa (70 ksi) | | 1400°F (760°C) | 690 MPa (100 ksi) | 550 MPa (80 ksi) | 240 MPa (35 ksi) | | 1600°F (870°C) | 415 MPa (60 ksi) | 345 MPa (50 ksi) | 110 MPa (16 ksi) | --- #### 5.0 Heat Treatment **Standard Heat Treatment Cycle (per AMS 5544):** 1. **Solution Treatment**: 1800°F (980°C) for 4 hours, air cool or faster 2. **Stabilization**: 1550°F (845°C) for 4 hours, air cool 3. **Aging**: 1400°F (760°C) for 16 hours, air cool *Alternative heat treatment cycles available for optimized properties* --- #### 6.0 Key Characteristics & Applications **6.1 Key Characteristics:** - **Excellent High-Temperature Strength**: Superior creep rupture strength up to 870°C (1600°F) - **Good Oxidation Resistance**: Adequate chromium content for protection in air - **Thermal Stability**: Maintains properties during long-term exposure - **Good Fatigue Resistance**: Suitable for high-cycle fatigue applications - **Moderate Fabricability**: Can be formed and welded with proper techniques **6.2 Primary Applications:** - **Aerospace Gas Turbine Components**: - Turbine blades and disks - Compressor sections - Shafts and spacers - Seals and fasteners - **Industrial Gas Turbines**: - Buckets (blades) and wheels - High-temperature bolting - **Other Applications**: - Nuclear reactor components - High-temperature fasteners - Rocket motor cases --- #### 7.0 Fabrication & Processing **7.1 Manufacturing Processes:** - Hot working: 1800-2150°F (980-1180°C) - Cold working: Limited due to high strength - Machining: Requires rigid equipment and positive feeds - Welding: Gas tungsten arc welding (GTAW) recommended **7.2 Processing Considerations:** - Susceptible to strain-age cracking - Requires controlled cooling rates - Post-weld heat treatment essential - Stress relief recommended after forming --- #### 8.0 International Standards & Specifications **Primary Aerospace Specifications:** | Specification | Title | Product Form | |---------------|-------|--------------| | **AMS 5544** | Alloy Waspaloy, Sheet, Strip, and Plate | Sheet, Strip, Plate | | **AMS 5708** | Alloy Waspaloy, Bars, Forgings, and Rings | Bar, Forgings | | **AMS 5828** | Alloy Waspaloy, Welding Wire | Wire | **Additional Standards:** - **ASTM B637**: Standard Specification for Precipitation-Hardening Nickel Alloy - **UNS N07001**: Unified Numbering System - **ISO 9724**: Nickel-based alloys for aerospace applications - **Pratt & Whitney PWA 1014**: Engine manufacturer specification --- #### 9.0 Quality Assurance & Testing **Standard Testing Requirements:** - Chemical analysis verification - Mechanical property testing - Microstructural examination - Non-destructive testing - Stress rupture testing for critical applications --- **Note:** Haynes® Waspaloy™ is a registered trademark of Haynes International, Inc. While AMS 5544 specifically covers sheet, strip, and plate forms, Waspaloy is available in various other forms under different specifications. This alloy represents an excellent balance of high-temperature capability and fabricability, making it suitable for both rotating and static components in gas turbine engines. Consultation with material specialists is recommended for specific application requirements.

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 3284 gallon liquid totes Special package is available on request.