Astroloy M,Astroloy M,UNS N13017，EFORU

### **Astroloy M / UNS N13017 - Technical Datasheet** 

 --- #### **1. Overview** 

**Astroloy M** (UNS N13017) is a nickel-based powder metallurgy superalloy designed for exceptional high-temperature strength and creep resistance in the most demanding gas turbine applications. This advanced precipitation-hardenable alloy is produced through powder metallurgy processes to achieve superior microstructural homogeneity and mechanical properties, particularly for turbine disk and rotating components operating at temperatures up to 815°C (1500°F). 

 --- #### **2. Chemical Composition (Weight %)

** The composition is optimized for powder metallurgy processing and high-temperature performance. 

 | Element | Content (%) | Role & Benefit | 

|---------|-------------|----------------| 

| **Nickel (Ni)** | Balance | Austenitic matrix providing high-temperature capability | 

| **Cobalt (Co)** | 15.0 - 18.0 | Solid solution strengthening and microstructural stability | 

| **Chromium (Cr)** | 14.0 - 16.0 | Oxidation and hot corrosion resistance | 

| **Molybdenum (Mo)** | 4.5 - 5.5 | Enhances strength and creep resistance | 

| **Aluminum (Al)** | 4.0 - 4.5 | Primary precipitation hardening (forms γ' - Ni₃Al) | 

| **Titanium (Ti)** | 3.3 - 3.7 | Secondary precipitation hardening (forms γ' - Ni₃Ti) | 

| **Boron (B)** | 0.020 - 0.035 | Enhances grain boundary strength and creep resistance | 

| **Zirconium (Zr)** | 0.025 - 0.065 | Improves stress rupture properties | 

| **Carbon (C)** | 0.02 - 0.06 | Controlled for carbide formation | 

| **Iron (Fe)** | 0.50 max | Controlled impurity | 

| **Manganese (Mn)** | 0.10 max | Controlled impurity | 

| **Silicon (Si)** | 0.15 max | Controlled impurity | 

 --- #### **3. Physical Properties** 

The physical properties support extreme high-temperature applications. 

 | Property | Value | 

|----------|-------| 

| **Density** | 8.10 g/cm³ (0.293 lb/in³) | 

| **Melting Range** | 1330-1380°C (2425-2515°F) | 

| **Specific Heat (20°C)** | 440 J/kg·K | 

| **Thermal Conductivity** | 11.5 W/m·K (at 20°C) | 

| **Mean Coefficient of Thermal Expansion** | 13.2 × 10⁻⁶/°C (20-300°C) | 

| **Electrical Resistivity** | 1.35 μΩ·m | 

| **Modulus of Elasticity** | 225 GPa (32.6 × 10⁶ psi) | 

| **Magnetic Permeability** | Essentially non-magnetic | 

 --- #### **4. Mechanical Properties

** The alloy develops exceptional strength through powder metallurgy processing and heat treatment. 

 **Solution Treated and Aged Condition:

| Property | Value | 

|----------|-------| 

| **Tensile Strength** | 1450-1650 MPa (210-240 ksi) | 

| **Yield Strength (0.2% Offset)** | 1250-1450 MPa (180-210 ksi) | 

| **Elongation** | 8-15% | | **Reduction of Area** | 12-20% | 

| **Hardness** | 40-48 HRC | **Elevated Temperature Properties (730°C/1350°F):

** | Property | Value | 

|----------|-------| 

| **Tensile Strength** | 1150 MPa (167 ksi) | 

| **Yield Strength** | 1050 MPa (152 ksi) | 

| **Creep Rupture Strength (100h)** | 550 MPa (80 ksi) | 

| **Stress Rupture Life (690 MPa/100 ksi)** | >100 hours | 

 --- #### **5. Heat Treatment** 

**Solution Treatment:** 1175°C (2150°F) for 4 hours, oil quench **Aging Treatment:** 845°C (1550°F) for 24 hours, air cool + 760°C (1400°F) for 8 hours, air cool 

**Alternative Aging:** 980°C (1800°F) for 4 hours + 730°C (1350°F) for 24 hours for optimized properties 

 --- #### **6. Product Applications** 

**Astroloy M** serves in the most demanding high-temperature rotating applications: 

 - **Aerospace Gas Turbines:**  

- High-pressure turbine disks  

- Compressor disks and spools  

- Turbine shafts and rotors  

- Critical rotating components 

 - **Industrial Gas Turbines:**  

- Power turbine disks  

- High-temperature rotors  

- Turbine wheels  

- Compressor rear frames 

 - **Advanced Power Systems:**  

- Land-based turbine components  

- Marine propulsion turbines  

- Auxiliary power units  

- Advanced turbine systems 

 - **Specialized Applications:**  

- Rocket engine turbopumps  

- Nuclear reactor components  

- High-performance rotating machinery  

- Critical defense applications 

 --- #### **7. International Standards** 

The material conforms to various international specifications: 

 | Standard | Specification | 

|----------|---------------| 

| **ASTM** | ASTM B637 - Precipitation Hardening Nickel Alloy Bars, Forgings, and Forging Stock | 

| **UNS** | UNS N13017 | 

| **AMS** | AMS 6400 (Powder Metallurgy Parts)

AMS 6401 (Bars and Forgings) | 

| **Aerospace** | AMS 6400, AMS 6401 | 

| **European** | EN 10295 - NiCo15Cr15MoTiAl | 

 --- #### **8. Powder Metallurgy Characteristics** 

 **Processing Method:** 

- Plasma rotating electrode process (PREP) or gas atomization 

- Hot isostatic pressing (HIP) consolidation 

- Isothermal forging capability 

- Superplastic forming characteristics **Microstructural Features:** 

- Fine, uniform grain structure 

- Homogeneous γ' precipitation 

- Controlled carbide distribution 

- Excellent microstructural stability 

 --- #### **9. Special Properties** 

 - **High-Temperature Capability:** Excellent strength retention up to 815°C (1500°F) 

- **Creep Resistance:** Superior long-term creep performance 

- **Fatigue Strength:** Excellent high-cycle and low-cycle fatigue resistance 

- **Thermal Stability:** Maintains microstructure during prolonged exposure 

- **Damage Tolerance:** Good crack propagation resistance 

 --- #### **10. Fabrication Considerations** 

 - **Powder Handling:** Requires controlled atmosphere processing 

- **Consolidation:** Hot isostatic pressing for optimal density 

- **Machining:** Requires specialized tooling and techniques 

- **Heat Treatment:** Critical control of solution and aging parameters 

- **Quality Control:** Extensive non-destructive testing required 

 --- #### **11. Summary** 

**Astroloy M (UNS N13017)** represents the pinnacle of powder metallurgy nickel-based superalloys, offering exceptional high-temperature strength and creep resistance for critical rotating components in advanced gas turbine engines. Its sophisticated composition, featuring high volume fractions of γ' forming elements (aluminum and titanium) combined with solid solution strengtheners (cobalt and molybdenum), delivers unparalleled mechanical properties at temperatures up to 815°C. The powder metallurgy manufacturing route ensures superior microstructural homogeneity and reliability compared to conventional cast and wrought processes. Governed by rigorous standards including AMS 6400-6401, Astroloy M continues to be the material of choice for high-pressure turbine disks and other critical rotating components where performance, reliability, and safety cannot be compromised in the most demanding aerospace and industrial applications.

Packing of Astroloy M,Astroloy M,UNS N13017

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 1734 gallon liquid totes Special package is available on request.