Alloy PK33,Nimonic PK33 Pipe,,E FORU

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

### **Product Data Sheet: Alloy PK33 / Nimonic PK33 Pipe (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 **pipe**, this material delivers **exceptional high-temperature strength, outstanding creep resistance, and superior pressure containment capability** at temperatures up to 950°C (1740°F). Nimonic PK33 pipe is engineered for the most demanding high-temperature, high-pressure applications where conventional materials would fail. The pipe form maintains the alloy's characteristic extreme temperature strength while providing reliable fluid and gas conveyance under the most severe thermal and mechanical stress conditions. --- #### **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 (Heat Treated Condition)** * **Tensile Strength:** 1200-1400 MPa (174-203 ksi) * **Yield Strength (0.2% Offset):** 850-1050 MPa (123-152 ksi) * **Elongation:** 10-20% **Pressure Rating:** * **Maximum Working Pressure:** Temperature-dependent design * **Burst Pressure:** Typically 3-4 times maximum working pressure * **Design Standards:** ASME B31.1, B31.3 applicable --- #### **4. Product Specifications** **Pipe Types Available:** * **Seamless Pipe** - For ultra-high-pressure, high-temperature service * **Welded and Cold Worked Pipe** - For specific applications * **Heavy Wall Pipe** - For extreme pressure conditions **Standard Sizes:** * **Outside Diameter:** 6mm to 300mm (0.25" to 12") * **Wall Thickness:** Schedule 5S to XXS * **Length:** Random lengths 3-7 meters, cut lengths available **Wall Thickness Tolerances:** * **Seamless Pipe:** ±12.5% of nominal wall thickness * **Special Precision:** ±10% available --- #### **5. Key Characteristics** * **Exceptional High-Temperature Strength:** Superior performance up to 950°C * **Outstanding Creep Resistance:** Excellent stress rupture properties under pressure * **Excellent Oxidation Resistance:** Extended service life in oxidizing environments * **Pressure Integrity:** Reliable performance in ultra-high-pressure systems * **Thermal Fatigue Resistance:** Excellent performance under thermal cycling conditions * **Good Weldability:** Can be welded using GTAW with matching filler metal * **Microstructural Stability:** Maintains properties during long-term exposure --- #### **6. Product Applications** Nimonic PK33 pipe is specified for critical high-temperature piping systems: * **Aerospace & Gas Turbine Engines:** * **High-pressure fuel systems** * **Hot gas path components** * **Exhaust gas manifolds** * **Afterburner fuel piping** * **Turbine cooling systems** * **Power Generation:** * **Advanced gas turbine fuel systems** * **High-temperature steam lines** * **Heat recovery system piping** * **Turbine bypass systems** * **Supercritical steam systems** * **Industrial Processing:** * **High-temperature chemical processing lines** * **Heat treatment furnace piping** * **Thermal oil systems** * **Pyroprocessing gas conduits** * **Nuclear Applications:** * **Advanced reactor systems** * **High-temperature gas-cooled reactors** --- #### **7. International Standards** | Standard Type | Standard Number | Description | | :--- | :--- | :--- | | **Unified Numbering System** | **UNS N07041** | All product forms | | **ASTM** | **ASTM B829** | Standard Specification for Seamless Nickel and Nickel Alloy Pipe | | **ASTM** | **ASTM B775/B776** | General Requirements for Nickel Alloy Pipe and Tube | | **Aerospace (SAE/AMS)** | **AMS 5806** | Seamless Pipe and Tubing | | **European** | **EN 10302** | Nickel and cobalt alloys | | **Werkstoff Nr.** | **2.4955** | Material number | | **ASME** | **SB-829** | ASME Code Case for pressure applications | --- #### **8. Fabrication & Welding** **Welding Requirements:** * **Process:** GTAW (TIG) preferred * **Filler Metal:** Matching composition or AWS A5.14 ERNiCrMo-XX * **Preheat:** Generally not required * **Post-Weld Heat Treatment:** Full solution and age treatment recommended **Forming & Bending:** * **Hot Forming:** 1050-1150°C * **Cold Forming:** Possible with proper tooling * **Bending Radius:** Minimum 3x pipe diameter --- **Summary** **Alloy PK33 Pipe (Nimonic PK33, UNS N07041)** represents the ultimate solution for high-temperature, high-pressure piping systems where reliability and performance are absolutely critical. Its exceptional creep strength, oxidation resistance, and pressure containment capability at temperatures up to 950°C make it indispensable for advanced aerospace propulsion systems, next-generation power generation equipment, and demanding industrial processes. The pipe form maintains consistent wall thickness and dimensional accuracy while providing the superior high-temperature properties that make Nimonic PK33 a preferred choice for extreme service conditions. Compliance with international standards including ASTM B829, AMS 5806, and ASME specifications ensures consistent quality and reliability for the most demanding high-temperature applications. Proper fabrication and welding techniques ensure optimal performance throughout the service life of the piping system, making Nimonic PK33 pipe the preferred choice for engineers designing systems that must operate reliably under the most severe thermal and pressure 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 2186 gallon liquid totes Special package is available on request.