Alloy 45,Low expansion 45 Alloy Pipe,,E FORU

British Specs:，American Specs:，German Specs:

**PRODUCT DATASHEET: ALLOY 45 / LOW EXPANSION 45 ALLOY PIPE** **Seamless & Welded Pipe Products** --- ### **1. OVERVIEW** **Alloy 45**, commercially known as **Low Expansion 45 Alloy**, is a specialized **nickel-iron alloy** containing **45% nickel** that delivers a **controlled coefficient of thermal expansion (CTE)** between traditional low-expansion alloys and standard piping materials. Supplied in **pipe form**, this product provides optimal thermal stability for fluid handling systems requiring intermediate expansion characteristics with excellent pressure integrity and corrosion resistance. --- ### **2. CHEMICAL COMPOSITION (Weight %)** | Element | Alloy 45 Pipe Specification | Typical Range | |------------------|-----------------------------|---------------| | **Nickel (Ni)** | 44.0 – 46.0% | 44.5 – 45.5% | | **Iron (Fe)** | Balance | Balance | | **Manganese (Mn)**| 0.30 – 0.70% | 0.40 – 0.60% | | **Silicon (Si)** | 0.15 – 0.30% | 0.20 – 0.25% | | **Carbon (C)** | ≤ 0.05% | ≤ 0.03% | | **Chromium (Cr)**| ≤ 0.15% | ≤ 0.10% | | **Copper (Cu)** | ≤ 0.05% | ≤ 0.03% | | **Aluminum (Al)**| ≤ 0.05% | ≤ 0.03% | | **Sulfur (S)** | ≤ 0.015% | ≤ 0.010% | | **Phosphorus (P)**| ≤ 0.015% | ≤ 0.010% | --- ### **3. PHYSICAL & MECHANICAL PROPERTIES** | Property | Seamless Pipe (Annealed) | Welded Pipe (Annealed) | |---------------------------------|--------------------------|------------------------| | **CTE (20–300°C)** | 6.5 – 7.5 × 10⁻⁶/°C | 6.5 – 7.5 × 10⁻⁶/°C | | **Density** | 8.17 g/cm³ | 8.17 g/cm³ | | **Melting Point** | 1425 – 1450°C | 1425 – 1450°C | | **Tensile Strength** | 540 – 640 MPa | 530 – 630 MPa | | **Yield Strength (0.2% Offset)**| 300 – 400 MPa | 290 – 390 MPa | | **Elongation (in 2")** | 25 – 35% | 23 – 33% | | **Modulus of Elasticity** | 148 GPa | 148 GPa | | **Hardness (Rockwell B)** | 70 – 85 HRB | 68 – 83 HRB | | **Electrical Resistivity** | 0.80 μΩ·m | 0.80 μΩ·m | | **Thermal Conductivity** | 15.0 W/m·K | 15.0 W/m·K | | **Maximum Service Temperature** | 450°C | 450°C | --- ### **4. INTERNATIONAL STANDARDS & EQUIVALENTS** | Standard Organization | Designation & Specification | |-----------------------|----------------------------| | **Proprietary** | Alloy 45, Nilo 45 | | **Custom Standards** | Customer-specific specifications | | **Similar Standards** | Based on ASTM B724 framework | | **European** | Similar to Ni45Fe series | | **Japanese** | Similar to C45N series | --- ### **5. PIPE SPECIFICATIONS** #### **5.1 Seamless Pipe** - **Size Range**: 8 mm OD to 120 mm OD - **Wall Thickness**: 1.2 mm to 10.0 mm - **Schedule Availability**: Schedule 5S to Schedule 40 - **Length**: Standard 3-6 meters, custom lengths available - **Tolerance**: Per customer specifications #### **5.2 Welded Pipe** - **Size Range**: 15 mm OD to 250 mm OD - **Wall Thickness**: 1.5 mm to 6.0 mm - **Welding Method**: TIG welded, full penetration - **Weld Quality**: Radiographically tested available - **Length**: Standard 3-6 meters, custom lengths available #### **5.3 Surface Finish & Condition** - **Surface Finish**: Pickled, passivated, or mechanically polished - **Heat Treatment**: Solution annealed and stress relieved - **End Finish**: Square cut, deburred, beveled ends - **Straightness**: 1.5 mm per meter maximum --- ### **6. PRODUCT APPLICATIONS** #### **6.1 Thermal Management Systems** - **Heat Exchanger Tubes**: Intermediate expansion applications - **Thermal Cycling Systems**: Where controlled expansion is critical - **Temperature Control Lines**: Process temperature management - **Heat Transfer Systems**: Controlled expansion heat pipes #### **6.2 Semiconductor & Electronics** - **Process Gas Lines**: Specialized gas distribution systems - **Coolant Circulation**: Electronic cooling systems - **Vacuum System Components**: Intermediate expansion requirements - **Specialized Instrumentation**: Custom process piping #### **6.3 Research & Laboratory** - **Analytical Instrument Piping**: Spectrometer and analyzer systems - **Laboratory Gas Lines**: Research facility piping systems - **Cryogenic Transfer Lines**: Intermediate temperature applications - **Scientific Apparatus**: Custom research equipment plumbing #### **6.4 Industrial Applications** - **Precision Process Piping**: Controlled expansion process lines - **Compensation Loops**: Thermal stress management systems - **Transition Sections**: Between different CTE materials - **Specialized Fluid Handling**: Corrosive or high-purity applications --- ### **7. TECHNICAL SPECIFICATIONS** #### **7.1 Pressure Ratings** - **Schedule 5S**: Low pressure applications (to 2.0 MPa) - **Schedule 10S**: Medium pressure service (to 5.0 MPa) - **Schedule 40**: Standard pressure applications (to 10.0 MPa) - **Custom Wall**: Special pressure requirements available #### **7.2 Temperature Performance** - **Cryogenic Service**: Down to -150°C - **Room Temperature**: Optimal CTE performance range - **Elevated Temperature**: Up to 450°C continuous service - **Thermal Cycling**: Excellent fatigue resistance #### **7.3 Corrosion Resistance** - **Atmospheric**: Good general corrosion resistance - **Aqueous Solutions**: Suitable for most water systems - **Chemical Resistance**: Moderate chemical compatibility - **Oxidation Resistance**: Good to 450°C in air --- ### **8. FABRICATION & INSTALLATION** #### **8.1 Cutting & Preparation** - **Cutting Methods**: Band saw, abrasive saw, plasma cutting - **End Preparation**: Machined bevels for welding (30-37.5°) - **Deburring**: Required for all cut ends - **Cleaning**: Essential for high-purity applications #### **8.2 Welding Procedures** - **Welding Process**: GTAW (TIG) recommended - **Filler Metal**: Matching composition or nickel-based alloys - **Shielding Gas**: Argon or argon/helium mixtures - **Purge Gas**: Required for interior protection during welding #### **8.3 Bending & Forming** - **Bend Radius**: Minimum 3× OD for cold bending - **Heat Treatment**: Stress relieving after forming recommended - **Tooling**: Mandrel bending for thin-wall pipes - **Springback**: Account for 2-3° springback --- ### **9. QUALITY ASSURANCE** #### **9.1 Material Certification** - **Chemical Analysis**: Certified for each heat - **Mechanical Testing**: Tensile and hardness certification - **Dimensions**: Verified to specified tolerances - **Surface Quality**: Per customer requirements #### **9.2 Non-Destructive Testing** - **Hydrostatic Testing**: Standard for all pressure pipes - **Radiographic Testing**: Available for welded pipes - **Ultrasonic Testing**: For seamless pipe integrity verification - **Dye Penetrant**: Weld and critical area inspection #### **9.3 Cleanliness & Packaging** - **Cleanroom Packaging**: For high-purity applications - **End Protection**: Plastic caps for all pipe ends - **Surface Protection**: VCI paper or plastic wrapping - **Identification**: Permanent marking per requirements --- ### **10. TECHNICAL ADVANTAGES** - **Controlled Thermal Expansion**: Intermediate CTE for specialized applications - **Excellent Pressure Integrity**: Suitable for various pressure applications - **Good Fabricability**: Compatible with standard piping fabrication methods - **Thermal Stability**: Maintains dimensions across temperature ranges - **Corrosion Resistance**: Suitable for most industrial environments - **Custom Sizes**: Available in various diameters and wall thicknesses --- **Note:** Alloy 45 pipe is typically supplied against specific customer requirements. For applications involving high pressure, extreme temperatures, or corrosive media, consultation with our technical team is essential. Custom testing and certification available to meet specific application 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 2472 gallon liquid totes Special package is available on request.