Alloy 301,Duranickel 301 Pipe,,E FORU

British Specs:，American Specs:，German Specs:

**Technical Datasheet: Duranickel® 301 (UNS N03301) Pipe** --- ### **Overview** Duranickel® 301 Pipe (Alloy 301, UNS N03301) is a precipitation-hardenable nickel alloy pipe product offering exceptional strength, excellent corrosion resistance, and superior mechanical properties in tubular form. Through controlled age-hardening heat treatment, this alloy achieves the highest strength levels among commercial nickel alloys while maintaining good ductility and outstanding performance in corrosive environments, making it ideal for high-pressure and high-stress piping applications. --- ### **Chemical Composition (Weight %)** | Element | Content (%) | Role | |---------|-------------|------| | Nickel (Ni) | 93.0–96.0 | Base element, provides corrosion resistance | | Titanium (Ti) | 4.0–5.0 | Primary age-hardening element | | Aluminum (Al) | 0.5–1.0 | Secondary hardening element | | Carbon (C) | ≤0.30 | Strength enhancement | | Manganese (Mn) | ≤0.50 | Improves hot workability | | Silicon (Si) | ≤0.50 | Deoxidizer | | Iron (Fe) | ≤0.50 | Residual element | | Sulfur (S) | ≤0.015 | Controlled impurity | | Magnesium (Mg) | 0.10–0.20 | 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) | | Magnetic Permeability | <1.002 (effectively non-magnetic) | --- ### **Mechanical Properties** **Solution Annealed Condition:** - **Tensile Strength**: 620–760 MPa (90–110 ksi) - **Yield Strength (0.2% Offset)**: 240–380 MPa (35–55 ksi) - **Elongation**: 25–35% - **Hardness**: HRB 85–95 **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 --- ### **Pressure-Temperature Ratings** **Maximum Working Pressure (Age-Hardened):** - **Room Temperature**: 690 bar (10,000 psi) - **315°C (600°F)**: 480 bar (7,000 psi) - **425°C (800°F)**: 345 bar (5,000 psi) **Temperature Range:** - **Minimum**: -196°C (-320°F) - **Maximum**: 480°C (900°F) continuous service --- ### **Product Applications** **Aerospace & Defense:** - High-pressure hydraulic lines - Fuel system components - Actuator pressure tubes - Engine bleed air systems - Landing gear hydraulic pipes **Marine & Offshore:** - High-pressure seawater lines - Hydraulic control systems - Subsea instrumentation lines - Marine shafting protection - Corrosive service piping **Oil & Gas:** - Downhole instrumentation housings - High-pressure chemical injection lines - Wellhead control systems - Subsurface safety valve conduits **Chemical Processing:** - High-pressure catalyst injection lines - Corrosive chemical transfer lines - Process instrumentation tubing - Reactor feed and discharge pipes **Power Generation:** - High-pressure boiler instrumentation - Turbine control systems - Hydraulic control lines - Steam pressure monitoring systems --- ### **Corrosion Resistance** - Excellent resistance to seawater and marine environments - Good performance in fresh water, steam, and alkaline solutions - Superior to high-strength steels in corrosive services - Resistance to stress corrosion cracking - Good performance in caustic soda and ammonia environments --- ### **Fabrication Characteristics** **Welding:** - Gas Tungsten Arc Welding (GTAW) preferred - Use matching filler metal (ENiCu-7) - Solution anneal before welding age-hardened material - Post-weld age hardening required for maximum properties - Good weldability with proper procedures **Machining:** - Best machined in solution-annealed condition - Use positive rake angles and sharp tools - Recommended cutting speeds: 20–40 SFM - Use sulfur-free cutting fluids - Good chip characteristics **Forming:** - Cold bending possible in annealed condition - Minimum bend radius: 3× pipe diameter - Heat treatment after severe forming recommended - Good dimensional stability during aging --- ### **International Standards** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | **ASTM** | B725/B725M | Standard Specification for Welded Nickel and Nickel-Alloy Pipe | | **ASTM** | B730 | Standard Specification for Welded Nickel and Nickel-Alloy Pipe | | **ASME** | SB-725 | Code-approved version for pressure applications | | **ASME** | SB-730 | Code-approved welded pipe specification | | **SAE** | AMS 5549 | Nickel Alloy, Welded Pipe - Age Hardenable | | **UNS** | N03301 | Unified Numbering System | | **ISO** | 6207 | Nickel alloy pipes for general purposes | --- ### **Available Specifications** **Pipe Sizes:** - **Outside Diameter**: 6 mm to 300 mm (0.25" to 12") - **Wall Thickness**: SCH 5S to SCH 80 - **Lengths**: Random (6–7 meters) or cut-to-length **Manufacturing Methods:** - **Seamless**: Cold drawn, pilgered - **Welded**: GTAW welded, cold worked - **Surface Finish**: Annealed and pickled, bright annealed **End Preparations:** - Plain ends - Beveled ends for welding - Threaded ends (NPT, BSP) - Special end finishes available --- ### **Quality Assurance** - Hydrostatic testing per ASTM standards - Eddy current or ultrasonic examination - Dimensional verification - Chemical analysis certification - Mechanical property testing - Heat treatment certification - EN 10204 3.1/3.2 certification available --- ### **Key Advantages** 1. **Highest Strength**: Maximum strength among nickel alloy pipes after age hardening 2. **Corrosion Resistance**: Superior to high-strength steel pipes in corrosive service 3. **Pressure Capability**: Excellent high-pressure performance 4. **Reliability**: Consistent properties and performance 5. **Temperature Stability**: Maintains properties at elevated temperatures --- **Notes:** - "Duranickel" is a registered trademark of Special Metals Corporation - Proper heat treatment is essential for achieving specified properties - Store in clean, dry conditions to prevent surface contamination - Consult technical experts for specific application requirements *For detailed technical assistance and application engineering support, contact materials engineering specialists.*

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 2901 gallon liquid totes Special package is available on request.