Alloy 301,Duranickel 301 ,,E FORU

British Specs:，American Specs:，German Specs:

**Technical Datasheet: Alloy 301 / Duranickel® 301 (UNS N03301)** --- ### **Overview** Duranickel® 301 (Alloy 301, UNS N03301) is a precipitation-hardenable nickel alloy known for its unique combination of high strength, excellent spring properties, and good corrosion resistance. This age-hardenable alloy maintains its mechanical properties at elevated temperatures and can be heat treated to achieve tensile strengths exceeding 1380 MPa (200 ksi), making it particularly valuable for applications requiring reliable performance under sustained stress. --- ### **Chemical Composition (Weight %)** | Element | Content (%) | Role | |---------|-------------|------| | Nickel (Ni) | 93.0–96.0 | Base element, provides matrix | | Titanium (Ti) | 4.0–5.0 | Primary hardening element | | Aluminum (Al) | 0.5–1.0 | Secondary hardening element | | Carbon (C) | ≤0.30 | Strength enhancement | | Manganese (Mn) | ≤0.50 | Deoxidizer | | Silicon (Si) | ≤0.50 | Deoxidizer | | Iron (Fe) | ≤0.50 | Residual | | Sulfur (S) | ≤0.015 | Controlled impurity | | Magnesium (Mg) | 0.10–0.20 | Sulfur control, grain refinement | --- ### **Physical Properties** | Property | Value | |----------|-------| | Density | 8.20 g/cm³ (0.296 lb/in³) | | Melting Point | 1440°C (2620°F) | | Thermal Conductivity | 29.7 W/m·K (at 20°C) | | Coefficient of Thermal Expansion | 13.5 μm/m·°C (20–100°C) | | Specific Heat Capacity | 460 J/kg·K | | Electrical Resistivity | 0.75 μΩ·m | | Modulus of Elasticity | 186 GPa (27×10⁶ psi) | --- ### **Mechanical Properties** **Annealed Condition:** - **Tensile Strength**: 620–760 MPa (90–110 ksi) - **Yield Strength (0.2% Offset)**: 240–380 MPa (35–55 ksi) - **Elongation**: 25–35% **Age-Hardened Condition:** - **Tensile Strength**: 1240–1520 MPa (180–220 ksi) - **Yield Strength (0.2% Offset)**: 1030–1380 MPa (150–200 ksi) - **Elongation**: 10–20% - **Hardness**: HRC 36–44 --- ### **Heat Treatment** **Solution Annealing:** - Temperature: 870–980°C (1600–1800°F) - Rapid cooling required **Age Hardening:** - Temperature: 595–620°C (1100–1150°F) - Time: 12–16 hours - Air cooling --- ### **Product Applications** **Spring Applications:** - High-temperature springs - Valve springs - Instrument springs - Electrical contact springs **Industrial Components:** - Diaphragms and bellows - Fasteners and bolts - Valve parts - Pump components **Specialty Applications:** - Oil well surveying instruments - Electrical relay components - Chemical processing equipment - Aerospace components **Marine Applications:** - Marine shafting - Pump rods - Fasteners for marine service --- ### **Corrosion Resistance** - Excellent resistance to fresh water, seawater, and atmospheric corrosion - Good resistance to caustic alkalis - Moderate resistance to acidic environments - Superior stress corrosion cracking resistance compared to high-strength steels --- ### **Fabrication Characteristics** **Machining:** - Good machinability in annealed condition - Use positive rake angles and sharp tools - Recommended speeds similar to Monel 400 **Welding:** - Readily weldable using GTAW and GMAW processes - Use matching filler metal (ENiCu-7) - Post-weld heat treatment recommended for maximum properties **Forming:** - Good cold working characteristics - All forming should be done in annealed condition - Intermediate annealing may be required for severe deformation --- ### **International Standards** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | **ASTM** | B865 | Standard Specification for Age-Hardening Nickel Alloy Bars, Forgings, and Forging Stock | | **ASTM** | B725/B725M | Standard Specification for Welded Nickel Alloy Pipe | | **SAE** | AMS 5549 | Nickel Alloy Wire, Spring, Age Hardenable | | **SAE** | AMS 5548 | Nickel Alloy, Strip, Spring, Age Hardenable | | **UNS** | N03301 | Unified Numbering System | | **ISO** | 9724 | Nickel alloy springs general requirements | | **DIN** | 17750 | Nickel alloys for spring applications | --- ### **Available Forms** - Round wire (0.1–10.0 mm diameter) - Strip and sheet (0.05–3.0 mm thickness) - Bar and rod (3.0–100 mm diameter) - Forging stock - Custom shapes --- ### **Key Advantages** 1. **High Strength**: Achieves the highest strength among commercial nickel alloys through age hardening 2. **Excellent Spring Properties**: Maintains spring characteristics at elevated temperatures 3. **Good Corrosion Resistance**: Superior to high-strength steels in corrosive environments 4. **Thermal Stability**: Retains properties after exposure to moderate temperatures 5. **Reliability**: Consistent performance under sustained loading --- ### **Notes** - "Duranickel" is a registered trademark of Huntington Alloys (now part of Special Metals Corporation) - Proper heat treatment is essential for achieving optimal properties - Material should be stored in clean, dry conditions to prevent contamination - Technical data represents typical values; actual properties may vary by product form and processing --- *For specific application requirements, technical consultation with materials engineers is recommended to ensure proper material selection and processing.*

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 2898 gallon liquid totes Special package is available on request.