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Home > Products > Nimonic bar > Nimonic PE16/N07016/W. Nr. 2.4969/Alloy PE16 bar
Nimonic PE16 bar, designated as UNS N07016 and material number W.Nr. 2.4969, is a precipitation-hardenable nickel-chromium-iron alloy strengthened by …
Nimonic PE16 bar, designated as UNS N07016 and material number W.Nr. 2.4969, is a precipitation-hardenable nickel-chromium-iron alloy strengthened by titanium and aluminum additions. It is specifically engineered for high-temperature service, offering a combination of good creep resistance, oxidation resistance, and fabricability. This bar stock form is a key material for machining components in gas turbine engines, aerospace fasteners, and industrial heating applications where strength and stability at temperatures up to approximately 750°C (1380°F) are required.
Nimonic PE16 is part of the Nimonic family of superalloys, designed to provide a balance between high-temperature performance and manufacturability. Compared to some higher-strength Nimonic alloys, PE16 exhibits excellent weldability and formability in the solution-annealed condition, while still developing considerable strength through aging. The bar stock is often used for fabricated sheet metal assemblies, casings, and machined parts that must withstand moderate stresses at elevated temperatures in oxidizing atmospheres.
The properties of Nimonic PE16 bar are derived from its nickel-chromium base with iron for cost-effectiveness and controlled additions of titanium and aluminum for hardening. Supplied by Shanghai NC Metal Materials Co., Ltd., the bar stock conforms to aerospace and industrial specifications.
| Element | Percentage (%) – Typical Range | Primary Function in the Alloy |
|---|---|---|
| Nickel (Ni) | Balance (≥ 42.0) | Base element; provides the austenitic matrix, oxidation resistance, and supports γ’ precipitation. |
| Chromium (Cr) | 15.0 – 17.0 | Provides resistance to oxidation and hot corrosion at high temperatures. |
| Iron (Fe) | 33.0 – 37.0 | Significant constituent; enhances fabricability, controls cost, and contributes to solid-solution strength. |
| Titanium (Ti) | 1.2 – 1.7 | Primary hardening element; combines with aluminum and nickel to form the strengthening gamma prime (γ’) phase Ni3(Al,Ti) during aging. |
| Aluminum (Al) | 1.0 – 1.6 | Co-primary hardening element; essential for γ’ formation. |
| Molybdenum (Mo) | 2.8 – 3.4 | Provides solid-solution strengthening and enhances high-temperature creep strength. |
| Carbon (C) | 0.12 max | Controlled to form beneficial carbides for grain boundary strength. |
| Boron (B) | 0.005 max | Trace addition to strengthen grain boundaries. |
| Manganese (Mn) | 1.0 max | Residual element. |
| Silicon (Si) | 1.0 max | Residual element. |
| Copper (Cu) | 0.20 max | Residual element. |
The mechanical properties of Nimonic PE16 bar are developed through solution treatment and aging. Bar is typically supplied in the solution-annealed condition for subsequent forming and machining.
Typical Value (Aged Condition)
| Mechanical Property | Typical Value (Solution Annealed) | Relevant Specification | |
|---|---|---|---|
| Tensile Strength | ≥ 690 MPa (100 ksi) | ≥ 930 MPa (135 ksi) | Aerospace/Industry Standards |
| Yield Strength (0.2% Offset) | ≥ 310 MPa (45 ksi) | ≥ 620 MPa (90 ksi) | – |
| Elongation in 2 inches (50mm) | ≥ 30% | ≥ 15% | – |
| Hardness (Rockwell) | ≤ 100 HRB | 28 – 38 HRC | – |
| Creep Strength (1000h rupture) | N/A | ≈ 170 MPa (25 ksi) at 700°C | – |
The physical properties of Alloy PE16 are important for design in high-temperature systems.
Notes / Condition
| Physical Property | Value at Room Temperature (20°C / 68°F) | |
|---|---|---|
| Density | 8.0 g/cm³ (0.289 lb/in³) | – |
| Melting Range | 1360 – 1410°C (2480 – 2570°F) | – |
| Specific Heat | ≈ 460 J/kg·°C (0.110 BTU/lb·°F) | At 100°C |
| Thermal Conductivity | 11.7 W/m·K (81.1 BTU·in/hr·ft²·°F) | At 100°C |
| Mean Coefficient of Thermal Expansion | 14.5 μm/m·°C (8.1 μin/in·°F) | 20-100°C (68-212°F) |
| Electrical Resistivity | 1.10 μΩ·m (43.3 μΩ·in) | At 20°C |
| Modulus of Elasticity (Tensile) | 206 GPa (29.9 x 10^6 psi) | At 20°C |
Shanghai NC Metal Materials Co., Ltd. supplies Nimonic PE16 bar primarily to aerospace and high-temperature engineering specifications.
| Product Form | Standard Size Range | Key Standard Specifications | Common Supply Conditions |
|---|---|---|---|
| Round Bar (Hot Rolled/Forged) | 10mm (0.4″) to 250mm (10″) Diameter | AMS 5701 (Bar), AMS 5700 (Forgings), UNS N07016, DIN 17752 (W.Nr. 2.4969) | Solution Annealed (Condition A), Solution Treated & Aged |
| Hexagonal Bar | 10mm to 50mm Across Flats | AMS 5701 | Solution Annealed |
| Square Bar | 10mm to 50mm Width | Customer specifications | Solution Annealed |
| Cold Finished Bar | 5mm to 80mm Diameter | AMS 5701 (cold drawn/ground) | Solution Annealed, Cold Drawn, & Stress-Relieved |
| Forging Billet | 100mm to 350mm Diameter | AMS 5700, Customer forging specs | Solution Treated |
Machined or forged components from Nimonic PE16 bar are used in high-temperature, moderate-stress environments: Aerospace: Turbine casings, combustion chamber components, afterburner parts, and high-temperature fasteners and bolts. Industrial Gas Turbines: Combustor liners, transition ducts, and bolting. Automotive Turbochargers: Turbine housings and components. Industrial Heating: Fixtures, brackets, and support structures for high-temperature furnaces. Nuclear Engineering: Selected components for gas-cooled reactors.
Nimonic PE16 achieves its properties through a standard heat treatment sequence: Solution Treatment: Heating to 1080-1120°C (1975-2050°F), holding, followed by rapid cooling (air or oil quench). This dissolves the γ’ forming elements. Aging Treatment: Heating to 700-750°C (1290-1380°F) for 16 hours, then air cooling. This precipitates the fine, strengthening γ’ phase. The alloy is often fabricated (welded, formed) in the solution-annealed condition, with aging performed as the final step.
Machining Nimonic PE16 bar is best performed in the solution-annealed condition. It is a tough, work-hardening alloy. Recommendations include: using rigid setups; sharp carbide tools with positive rake; moderate speeds; consistent feeds; and ample coolant. Its machinability is similar to other nickel-based superalloys. It has excellent formability in the annealed state, allowing for complex cold forming operations before aging.
A key advantage of Nimonic PE16 is its excellent weldability compared to many precipitation-hardened superalloys. It can be welded using Gas Tungsten Arc Welding (GTAW/TIG) and other processes in the solution-annealed condition without a strong tendency for post-weld heat treatment cracking. Matching filler metals (e.g., NiCr20Nb) or over-alloyed fillers are used. A full post-weld heat treatment (solution treat + age) is required to restore optimum properties in the weld zone, which is more feasible with PE16 than with some other alloys due to its lower sensitivity.
The price of Nimonic PE16 bar from Shanghai NC Metal Materials Co., Ltd. is influenced by its nickel and chromium content, specialized heat treatment, and its aerospace-grade quality.
| Pricing Factor | Impact on Reference Price | Procurement Guidance |
|---|---|---|
| Alloying Element Costs | Nickel and chromium are significant cost drivers. The titanium and aluminum additions also contribute. | PE16 often represents a cost-effective choice within the family of wrought nickel superalloys, offering a good balance of properties and fabricability. |
| Heat Treatment Condition | Bar supplied in the solution-treated and aged condition is more expensive due to the additional thermal processing. | For complex fabricated assemblies, purchase in the solution-annealed condition, fabricate, then age. For simple machined parts, pre-aged bar may be more convenient. |
| Aerospace Specification (AMS) | Bar conforming to AMS 5701 with full traceability and testing commands a premium over commercial-grade material. | Specify the exact standard required. “AMS 5701 Condition A” is a common callout for aerospace components requiring subsequent forming and aging. |
| Form, Size, and Testing | Precision cold-finished bar and large forging billets are higher cost. Extensive testing (creep, stress rupture) adds significant expense. | Use standard hot-rolled bar for general machining. Clearly define the required test package; for many applications, standard mechanical property and chemistry certification is sufficient. |
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