Alloy 301,Duranickel 301 Fittings,,E FORU

British Specs:，American Specs:，German Specs:

**Technical Datasheet: Duranickel® 301 (UNS N03301) Fittings** --- ### **Overview** Duranickel® 301 Fittings (Alloy 301, UNS N03301) are precision-engineered components manufactured from precipitation-hardenable nickel alloy, designed to provide exceptional strength, superior corrosion resistance, and reliable performance in demanding piping systems. These fittings maintain integrity in corrosive environments while offering the highest strength capabilities among commercial nickel alloy fittings through proper age-hardening heat treatment. --- ### **Chemical Composition (Weight %)** | Element | Content (%) | Role | |---------|-------------|------| | Nickel (Ni) | 93.0–96.0 | Base element, 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 | Hot workability improvement | | 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 | | Modulus of Elasticity | 186 GPa (27×10⁶ psi) | | Magnetic Permeability | <1.002 (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 --- ### **Types of Fittings Available** **Butt-Weld Fittings:** - Elbows (45°, 90°, 180°) - Tees (equal and reducing) - Reducers (concentric and eccentric) - Caps and stub ends **Socket-Weld Fittings:** - Unions - Elbows - Tees - Couplings - Plugs **Threaded Fittings:** - NPT threaded components - BSP threaded options **Special Fittings:** - Custom-designed components - High-pressure couplings - Manifold blocks - Adapter fittings --- ### **Product Applications** **Aerospace & Defense:** - Aircraft hydraulic systems - Fuel system fittings - Engine bleed air systems - Missile propulsion systems - Satellite fluid systems **Marine & Offshore:** - Seawater system fittings - Hydraulic control systems - Subsea instrumentation - Marine engine systems - Offshore platform piping **Oil & Gas:** - Wellhead control systems - Chemical injection fittings - Downhole tool connections - Pipeline connection systems - Pressure control fittings **Chemical Processing:** - Corrosive fluid handling - High-pressure reactor systems - Process instrumentation - Chemical transfer lines - Reactor feed systems **Power Generation:** - High-pressure boiler systems - Turbine control fittings - Hydraulic control systems - Instrumentation connections - Cooling system components --- ### **Corrosion Resistance** - Excellent seawater and marine atmosphere resistance - Superior performance in fresh water and steam - Good resistance to alkaline solutions - Excellent stress corrosion cracking resistance - Superior to high-strength steels in corrosive service - Suitable for mildly acidic environments --- ### **Fabrication Characteristics** **Machining:** - Best machined in solution-annealed condition - Positive rake angles recommended - Cutting speeds: 25–40 SFM - Sulfur-free cutting fluids required - Good surface finish achievable **Welding:** - Gas Tungsten Arc Welding (GTAW) preferred - Use ENiCu-7 filler metal - Solution anneal before welding - Post-weld age hardening required - Excellent weldability with proper procedures **Heat Treatment:** - Solution annealing: 870–980°C (1600–1800°F) - Age hardening: 595–620°C (1100–1150°F) for 12–16 hours - Rapid cooling after solution annealing - Air cooling after age hardening --- ### **International Standards** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | **ASTM** | B366 | Factory-Made Wrought Nickel Alloy Fittings | | **ASME** | B16.9 | Steel Butt-Welding Fittings | | **ASME** | B16.11 | Socket-Welded and Threaded Fittings | | **ASME** | SB-366 | Code-approved nickel alloy fittings | | **MSS** | SP-43 | Wrought Stainless Steel Fittings | | **UNS** | N03301 | Unified Numbering System | | **ISO** | 9001 | Quality Management Systems | --- ### **Quality Assurance** - Hydrostatic testing certification - Dimensional verification - Chemical composition certification - Mechanical property testing - Heat treatment certification - Non-destructive testing available - EN 10204 3.1/3.2 certification --- ### **Key Advantages** 1. **Highest Strength**: Maximum strength among nickel alloy fittings 2. **Corrosion Resistance**: Superior to high-strength steel fittings 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 essential for optimal properties - All fittings supplied with material certification - Custom designs and special configurations available *For technical assistance and application engineering, consult with 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 2906 gallon liquid totes Special package is available on request.