DURANICKEL 301 (UNS N03301)，1

### **Product Introduction: DURANICKEL® 301 (UNS N03301)** **DURANICKEL® 301** is a precipitation-hardenable nickel alloy specifically engineered to combine high strength with excellent spring properties and good corrosion resistance. This age-hardenable alloy derives its superior mechanical properties through the addition of aluminum and titanium, which form strengthening precipitates during heat treatment, making it particularly suitable for applications requiring high strength-to-weight ratio and reliable performance in demanding environments. The alloy maintains excellent spring characteristics up to approximately 370°C (700°F) and demonstrates good resistance to corrosion in various environments, including marine and industrial atmospheres. Its unique combination of properties has made it a preferred material for critical spring applications and other high-stress components. --- ### **Chemical Composition** | Element | Content (%) | |---------|-------------| | **Nickel (Ni)** | ≥ 93.0 | | **Aluminum (Al)** | 0.50 - 1.80 | | **Titanium (Ti)** | 2.25 - 3.25 | | **Silicon (Si)** | 0.75 - 1.50 | | **Iron (Fe)** | 0.75 max | | **Copper (Cu)** | 0.25 max | | **Manganese (Mn)** | 1.25 max | | **Carbon (C)** | 0.30 max | | **Magnesium (Mg)** | 0.10 - 0.50 | --- ### **Physical Properties** | Property | Value | |----------|-------| | **Density** | 8.19 g/cm³ | | **Melting Point** | 1440 - 1465 °C | | **Thermal Conductivity** | 17.0 W/m·K (at 20°C) | | **Electrical Resistivity** | 0.99 μΩ·m | | **Modulus of Elasticity** | 186 GPa | | **Coefficient of Thermal Expansion** | 13.3 μm/m·°C (20-100°C) | | **Specific Heat Capacity** | 460 J/kg·K | | **Magnetic Response** | Essentially non-magnetic | --- ### **Mechanical Properties** **Solution Annealed Condition:** - **Tensile Strength:** 620 - 760 MPa - **Yield Strength (0.2% Offset):** 240 - 410 MPa - **Elongation:** 35 - 45% - **Hardness:** 85 - 95 HRB **Precipitation Hardened Condition:** - **Tensile Strength:** 1100 - 1310 MPa - **Yield Strength (0.2% Offset):** 790 - 1030 MPa - **Elongation:** 15 - 25% - **Hardness:** 28 - 38 HRC --- ### **Heat Treatment** **Standard Heat Treatment Cycle:** - **Solution Treatment:** 980 - 1010°C (1800 - 1850°F), rapid cool - **Aging Treatment:** 595 - 620°C (1100 - 1150°F) for 12 - 16 hours, air cool **Alternative Treatments:** - Stress relief treatments available - Custom aging cycles for specific property optimization --- ### **Key Characteristics & Advantages** 1. **High Strength and Spring Properties** - Excellent spring characteristics up to 370°C - High strength-to-weight ratio - Good fatigue resistance and durability 2. **Good Corrosion Resistance** - Resistant to marine and industrial atmospheres - Good performance in various chemical environments - Maintains properties in corrosive conditions 3. **Excellent Fabricability** - Can be cold worked in the solution treated condition - Good machinability in the aged condition - Suitable for various forming operations 4. **Precipitation Hardenable** - Significant strength increase through aging treatment - Good combination of strength and ductility - Stable mechanical properties --- ### **Product Applications** **Spring Applications:** - High-temperature springs - Valve springs - Instrument springs - Critical mechanical springs **Aerospace Industry:** - Aircraft engine components - Structural fasteners - High-stress mechanical parts - Turbine components **Industrial Applications:** - Chemical processing equipment - Marine components - Oil and gas industry parts - High-strength fasteners **Electronic Applications:** - Connector components - Relay parts - Electrical contacts - Precision instruments --- ### **International Standards** | Standard Type | Standard Number | Description | |---------------|-----------------|-------------| | **UNS** | N03301 | Unified Numbering System | | **ASTM** | B865 | Rod, Bar, and Forgings | | **AMS** | 4731 | Bar and Wire | | **ASME** | SB-865 | Code Cases | | **MIL** | MIL-N-23665 | Military Specification | --- ### **Summary** **DURANICKEL® 301 (UNS N03301)** is a premium precipitation-hardenable nickel alloy that offers an exceptional combination of high strength, excellent spring properties, and good corrosion resistance. Its ability to maintain mechanical properties at elevated temperatures, combined with reliable performance in corrosive environments, makes it particularly valuable for critical spring applications, aerospace components, and high-stress industrial parts. The alloy's precipitation hardening capability allows for significant strength enhancement while maintaining adequate ductility, providing engineers with a versatile material solution for demanding applications. Certification to major international standards including ASTM, AMS, and ASME specifications ensures consistent quality and performance, making DURANICKEL 301 a trusted choice for applications where reliability, strength, and durability are paramount 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 3339 gallon liquid totes Special package is available on request.