Alloy PK33,Nimonic PK33 Strip,,E FORU

British Specs:DTD 5057，American Specs:，German Specs: AFNOR NC19 KDu/v

### **Product Data Sheet: Alloy PK33 / Nimonic PK33 Strip (UNS N07041)** **Overview** **Alloy PK33** (commercially known as **Nimonic PK33**) is a high-performance nickel-chromium-cobalt superalloy strengthened by precipitation hardening. In the form of **strip**, this material delivers **exceptional high-temperature strength, outstanding creep resistance, and superior dimensional precision** at temperatures up to 950°C (1740°F). Nimonic PK33 strip is precision-rolled to exacting tolerances, making it ideal for applications requiring tight dimensional control, consistent mechanical properties, and reliable performance in extreme thermal environments. The strip form combines the alloy's superior high-temperature capabilities with exceptional formability and surface quality for precision manufacturing applications. --- #### **1. Chemical Composition** | Element | Content (%) (Typical) | Role in the Alloy | | :--- | :--- | :--- | | **Nickel (Ni)** | Balance | Austenitic matrix; provides corrosion resistance and ductility | | **Chromium (Cr)** | 18.0 - 21.0 | Confers oxidation and hot corrosion resistance | | **Cobalt (Co)** | 16.0 - 21.0 | Solid solution strengthener; enhances high-temperature strength | | **Molybdenum (Mo)** | 8.0 - 10.0 | Provides solid solution strengthening and creep resistance | | **Aluminum (Al)** | 1.0 - 2.0 | Precipitation hardener (forms γ' phase, Ni₃Al) | | **Titanium (Ti)** | 2.5 - 3.5 | Primary precipitation hardener; contributes to γ' formation | | **Carbon (C)** | 0.03 - 0.10 | Forms carbides for grain boundary strength | | **Boron (B)** | 0.003 - 0.010 | Strengthens grain boundaries and improves creep life | | **Zirconium (Zr)** | 0.02 - 0.10 | Enhances creep rupture properties | --- #### **2. Physical Properties** | Property | Value / Condition | | :--- | :--- | | **Density** | 8.25 g/cm³ (0.298 lb/in³) | | **Melting Range** | 1330 - 1380°C (2425 - 2515°F) | | **Specific Heat** | 440 J/kg·K (0.105 Btu/lb·°F) @ 20°C | | **Thermal Conductivity** | 11.2 W/m·K (77.7 Btu·in/hr·ft²·°F) @ 20°C | | **Mean Coefficient of Thermal Expansion** | 13.1 × 10⁻⁶/°C (20-500°C) | | | 16.5 × 10⁻⁶/°C (20-900°C) | | **Electrical Resistivity** | 1.30 μΩ·m @ 20°C | | **Modulus of Elasticity** | 220 GPa (32.0 × 10⁶ psi) @ 20°C | --- #### **3. Mechanical Properties** **Typical Room Temperature Properties (Solution Treated & Aged)** * **Tensile Strength:** 1200-1400 MPa (174-203 ksi) * **Yield Strength (0.2% Offset):** 850-1050 MPa (123-152 ksi) * **Elongation:** 10-20% **Elevated Temperature Performance** * **Stress Rupture Strength (1000 hours):** * **850°C (1560°F):** ~150 MPa (~22 ksi) * **950°C (1740°F):** ~65 MPa (~9.4 ksi) --- #### **4. Product Specifications** **Strip Dimensions:** * **Thickness:** 0.05mm to 2.0mm (0.002" to 0.080") * **Width:** 2mm to 600mm (0.08" to 24") * **Custom slitting available to precise width requirements** **Tolerances:** * **Thickness:** ±0.002mm for precision applications * **Width:** ±0.03mm for slitted edges * **Flatness:** Controlled to meet aerospace requirements * **Camber:** 0.5mm per meter maximum **Surface Quality:** * Bright annealed finish * Pickled finish available * Special surface finishes upon request * Surface roughness: Ra ≤ 0.3 μm (bright annealed) --- #### **5. Key Characteristics** * **Precision Dimensional Control:** Maintains tight tolerances for automated manufacturing * **Exceptional High-Temperature Strength:** Superior performance up to 950°C * **Outstanding Creep Resistance:** Excellent stress rupture properties * **Excellent Oxidation Resistance:** Extended service life in oxidizing environments * **Superior Formability:** Suitable for stamping, bending, and deep drawing operations * **Consistent Mechanical Properties:** Uniform characteristics throughout the coil length * **Excellent Surface Quality:** Optimal for plating, coating, and subsequent processing * **Good Weldability:** Compatible with various welding processes * **Thermal Stability:** Minimal dimensional change during thermal cycling --- #### **6. Product Applications** Nimonic PK33 strip is specified for precision components in extreme temperature environments: * **Aerospace & Gas Turbine Engines:** * **Turbine seal segments and honeycomb seals** * **Combustion chamber components** * **Heat shield assemblies** * **Retaining rings and clips** * **Sensor and instrumentation mounts** * **Blade retention components** * **Power Generation:** * **Advanced gas turbine sealing elements** * **Heat exchanger components** * **Thermal protection systems** * **Electrical resistance heating elements** * **Turbine cooling system components** * **Industrial Processing:** * **High-temperature furnace components** * **Heat treatment fixture components** * **High-temperature springs and fasteners** * **Thermal processing equipment parts** * **Chemical reactor internals** * **Electronics & Instrumentation:** * **High-temperature electrical contacts** * **Thermocouple protection sheaths** * **Sensor components** * **Vacuum furnace components** --- #### **7. International Standards** | Standard Type | Standard Number | Description | | :--- | :--- | :--- | | **Unified Numbering System** | **UNS N07041** | All product forms | | **ASTM** | **ASTM B168** | Standard Specification for Nickel-Chromium-Aluminum Alloy Plate, Sheet, and Strip | | **Aerospace (SAE/AMS)** | **AMS 5807** | Strip and Sheet Specifications | | **British Standard** | **BS HR 8** | Strip Specifications | | **European** | **EN 10302** | Nickel and cobalt alloys | | **Werkstoff Nr.** | **2.4955** | Material number | --- #### **8. Quality Assurance** **Testing & Certification:** * Dimensional verification with laser scanning * Surface quality inspection * Chemical composition certification * Mechanical properties testing at elevated temperatures * Flatness and straightness measurement * Traceability to original heat number **Special Processing:** * Precision slitting capabilities * Edge conditioning * Surface cleaning and finishing * Protective packaging for delicate strip * Custom coil sizes and weights **Performance Validation:** * High-temperature oxidation testing * Creep relaxation testing * Thermal cycling evaluation * Spring load retention testing --- **Summary** **Alloy PK33 Strip (Nimonic PK33, UNS N07041)** provides an exceptional combination of extreme temperature performance, dimensional precision, and fabrication versatility for the most demanding applications. Its outstanding creep resistance and oxidation stability at temperatures up to 950°C make it particularly suitable for precision components in advanced gas turbine engines, next-generation power generation equipment, and high-temperature industrial systems. The strip form offers excellent consistency and quality, enabling high-volume production of critical components while maintaining the superior properties that make Nimonic PK33 a preferred choice for extreme temperature service. Compliance with international standards including AMS 5807, ASTM B168, and BS HR 8 ensures reliable performance in critical applications where component reliability and extended service life are paramount requirements. Precision manufacturing combined with comprehensive quality assurance protocols guarantees material performance and dimensional accuracy, making Nimonic PK33 strip the ideal choice for engineers designing systems that must operate reliably under the most severe thermal conditions encountered in modern high-technology 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 2190 gallon liquid totes Special package is available on request.