Alloy 42,Nilo 42 Pipe,UNS K94100,E FORU

British Specs:，American Specs: ASTM F30 ASTM B 753 AMS 5683 Welding Wire，German Specs: WS 1.3917,DIN 17745 AFNOR NF A54-301

**PRODUCT DATASHEET: ALLOY 42 / NILO 42 PIPE** **UNS K94100 - Seamless & Welded Pipe** --- ### **1. OVERVIEW** Alloy 42 (commercially known as **Nilo 42**) is a **nickel-iron alloy** with approximately **42% nickel content**, specifically formulated to exhibit a **thermal expansion coefficient** that closely matches **borosilicate glass, alumina ceramics, and semiconductor materials**. Available in **seamless and welded pipe** forms, this product is engineered for applications requiring precise thermal management and dimensional stability in tubular configurations. The alloy is registered under the Unified Numbering System as **UNS K94100**. --- ### **2. CHEMICAL COMPOSITION (Weight %)** | Element | Alloy 42 / Nilo 42 Pipe | UNS K94100 Requirements | |------------------|-------------------------|-------------------------| | **Nickel (Ni)** | 41.0 – 42.5% | 41.0 – 42.5% | | **Iron (Fe)** | Balance | Balance | | **Manganese (Mn)**| 0.50 – 0.80% | ≤ 0.80% | | **Silicon (Si)** | 0.15 – 0.30% | ≤ 0.30% | | **Carbon (C)** | ≤ 0.05% | ≤ 0.05% | | **Chromium (Cr)**| ≤ 0.15% | ≤ 0.15% | | **Copper (Cu)** | ≤ 0.05% | ≤ 0.05% | | **Aluminum (Al)**| ≤ 0.05% | ≤ 0.05% | | **Sulfur (S)** | ≤ 0.015% | ≤ 0.015% | | **Phosphorus (P)**| ≤ 0.015% | ≤ 0.015% | --- ### **3. PHYSICAL & MECHANICAL PROPERTIES** | Property | Seamless Pipe (Annealed) | Welded Pipe (Annealed) | |---------------------------------|--------------------------|------------------------| | **CTE (20–300°C)** | 4.5 – 5.5 × 10⁻⁶/°C | 4.5 – 5.5 × 10⁻⁶/°C | | **Density** | 8.11 g/cm³ | 8.11 g/cm³ | | **Melting Point** | 1420 – 1450°C | 1420 – 1450°C | | **Tensile Strength** | 510 – 610 MPa | 500 – 600 MPa | | **Yield Strength (0.2% Offset)**| 270 – 370 MPa | 260 – 360 MPa | | **Elongation (in 2")** | 30 – 40% | 28 – 38% | | **Modulus of Elasticity** | 145 GPa | 145 GPa | | **Hardness (Rockwell B)** | 65 – 80 HRB | 63 – 78 HRB | | **Electrical Resistivity** | 0.75 μΩ·m | 0.75 μΩ·m | | **Thermal Conductivity** | 14.5 W/m·K | 14.5 W/m·K | | **Maximum Service Temperature** | 400°C | 400°C | --- ### **4. INTERNATIONAL STANDARDS & EQUIVALENTS** | Standard Type | Designation | |-------------------------|----------------------| | **UNS** | K94100 | | **ASTM** | F30 (Alloy 42) | | **EN (European)** | Ni42Fe (1.3917) | | **ISO** | NiFe42 | | **JIS** | C42N | | **GB (China)** | 4J42 | | **DIN** | Ni42 | | **Pipe Standard** | ASTM B724 | --- ### **5. PRODUCT APPLICATIONS** #### **Electronics & Semiconductor** - **Wafer processing equipment** components - **Vacuum chamber** piping systems - **Gas distribution** lines in semiconductor manufacturing - **Thermal management** systems for electronic enclosures #### **Aerospace & Defense** - **Waveguide** components for radar systems - **Instrumentation** piping for avionics - **Cryogenic** transfer lines - **Environmental control** system components #### **Industrial & Research** - **Glass-to-metal seal** assemblies - **Laboratory instrument** piping - **Optical system** structural components - **Precision measurement** equipment frames #### **Energy Sector** - **Solar cell** manufacturing equipment - **Vacuum interrupter** components - **Power electronics** cooling systems - **Sensor housing** and protection tubes --- ### **6. PRODUCT SPECIFICATIONS** #### **Seamless Pipe** - **Size Range**: 6 mm OD to 150 mm OD - **Wall Thickness**: 1.0 mm to 12.5 mm - **Length**: Standard 3-6 meters, custom lengths available - **Tolerance**: ASTM B724, ASME SB-724 #### **Welded Pipe** - **Size Range**: 12 mm OD to 300 mm OD - **Wall Thickness**: 1.5 mm to 8.0 mm - **Length**: Standard 3-6 meters, custom lengths available - **Welding Method**: TIG welded, full penetration --- ### **7. TECHNICAL ADVANTAGES** - **Excellent Thermal Expansion Match** with glass and ceramics - **Superior Dimensional Stability** under thermal cycling - **Good Corrosion Resistance** in most industrial environments - **Excellent Weldability** and fabricability - **Low Gas Permeability** for vacuum applications - **Magnetic Properties** below Curie temperature (360°C) --- ### **8. FABRICATION CAPABILITIES** - **Bending**: Cold bending with minimum radius 3× OD - **Welding**: TIG, MIG, and plasma welding compatible - **Machining**: Suitable for threading, grooving, and flanging - **Heat Treatment**: Stress relieving at 600-700°C recommended after welding - **Surface Finish**: Pickled, polished, or passivated surfaces available --- ### **9. QUALITY ASSURANCE** - **Certification**: Material test reports per EN 10204 3.1/3.2 - **Testing**: Hydrostatic testing, eddy current testing, ultrasonic testing - **Traceability**: Full material history from melt to finished pipe - **Compliance**: Meets ASTM, ASME, EN, and ISO standards - **Documentation**: Certified chemical and mechanical test reports --- ### **10. PACKAGING & HANDLING** - **Protection**: Plastic end caps and waterproof wrapping - **Marking**: Heat number, size, and material grade stamped on each pipe - **Storage**: Indoor storage in dry conditions recommended - **Handling**: Use non-metallic slings to prevent surface damage --- **Note:** For applications involving high vacuum or ultra-pure media, electropolished interior surfaces are available. Contact our technical team for specific application engineering support and custom size 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 2446 gallon liquid totes Special package is available on request.