Multimet N155,Multimet Pipe,UNS R30155,E FORU

British Specs:，American Specs: AMS 5532 Sheet, Plate and Strip AMS 5769 Bars, Rings and Forgings AMS 5794 Welding Wire AMS 5795 Coated Electrodes，German Specs:

### Technical Data Sheet: Multimet N155 / Multimet Pipe / UNS R30155 **Iron-Nickel-Chromium-Cobalt Superalloy Pipe Product** --- ### 1. Product Overview **Multimet N155 Pipe** (UNS R30155) is manufactured from the iron-nickel-chromium-cobalt superalloy, designed for high-temperature piping systems requiring excellent strength and oxidation resistance up to **980°C (1800°F)**. This product combines outstanding high-temperature mechanical properties with good fabricability, making it suitable for critical fluid and gas handling applications in extreme environments. --- ### 2. Chemical Composition (Weight %) | Element | Content (%) | Key Characteristics | |---------|-------------|---------------------| | **Iron (Fe)** | Balance | Matrix element | | **Chromium (Cr)** | 20.0–22.0 | Oxidation and corrosion resistance | | **Nickel (Ni)** | 19.0–21.0 | Austenitic structure stability | | **Cobalt (Co)** | 18.0–20.0 | Solid solution strengthening | | **Tungsten (W)** | 2.0–3.0 | Solid solution strengthening | | **Molybdenum (Mo)** | 2.0–3.0 | Solid solution strengthening | | **Niobium (Nb)** | 0.75–1.25 | Carbide formation and strengthening | | **Carbon (C)** | 0.05–0.10 | Carbide strengthening | | **Nitrogen (N)** | 0.10–0.20 | Solid solution strengthening | | **Manganese (Mn)** | 1.0–2.0 | Hot workability | | **Silicon (Si)** | ≤ 0.75 | Residual element | --- ### 3. Physical Properties | Property | Value | |----------|-------| | **Density** | 8.23 g/cm³ (0.297 lb/in³) | | **Melting Range** | 1370–1425°C (2500–2600°F) | | **Thermal Conductivity** | 14.2 W/m·K at 100°C | | **Mean CTE (20-100°C)** | 14.5 µm/m·°C | | **Electrical Resistivity** | 1.05 µΩ·m at 25°C | | **Magnetic Permeability** | Essentially non-magnetic | --- ### 4. Mechanical Properties **Room Temperature Properties (Solution Annealed):** - **Tensile Strength**: 790 MPa min (115 ksi min) - **Yield Strength (0.2% Offset)**: 415 MPa min (60 ksi min) - **Elongation**: 35% min - **Hardness**: 95 HRB max **Elevated Temperature Performance:** - **Stress Rupture Strength**: 100 MPa at 815°C for 100 hours - **Maximum Working Pressure**: Varies with temperature and pipe size - **Oxidation Resistance**: Excellent up to 980°C --- ### 5. Product Specifications **Pipe Size Range:** - **Outside Diameter**: 6 mm to 300 mm (0.25" to 12") - **Wall Thickness**: Schedule 5S to XXS - **Length**: Random 3-7 meters, cut lengths per requirement **Manufacturing Processes:** - **Seamless Pipe**: ASTM B622 for maximum integrity - **Welded Pipe**: ASTM B619 for larger diameters - **Surface Finish**: Pickled, polished, or as-drawn **Pressure Ratings:** - **ASME B31.3**: Compliant for process piping - **Temperature-Pressure Ratings**: Available upon request --- ### 6. Applications **Aerospace & Defense:** - Jet engine exhaust ducts - Afterburner fuel lines - Turbine bleed air systems - High-temperature hydraulic lines **Power Generation:** - Gas turbine fuel manifolds - Heat recovery steam generator tubing - High-temperature steam lines - Boiler superheater tubes **Industrial Processing:** - Heat treatment furnace piping - Chemical process transfer lines - Petrochemical reactor piping - High-temperature heat exchanger tubes **Other Applications:** - Nuclear instrumentation lines - Semiconductor processing equipment - Thermal oxidizer systems - Waste heat recovery systems --- ### 7. International Standards | Standard Type | Standard Number | Specification | |---------------|-----------------|---------------| | **UNS** | R30155 | Material designation | | **ASTM** | B622 | Seamless Pipe and Tube | | **ASTM** | B619 | Welded Pipe | | **ASME** | SB-622 | Boiler and Pressure Vessel Code | | **AMS** | 5768 | Bar and forgings (base material) | --- ### 8. Fabrication & Installation **Welding Procedures:** - **Recommended Process**: GTAW (TIG) - **Filler Metal**: AWS A5.14 ERNiCrCoMo-1 or matching composition - **Preheat**: 200–300°C (400–600°F) recommended - **Post-Weld Heat Treatment**: Solution anneal at 1175–1205°C **Pipe Fitting & Joining:** - **Butt Welding**: ASME B16.25 preparation - **Flanged Connections**: ASME B16.5 compatible - **Threaded Connections**: NPT threads available **Installation Guidelines:** - **Support Spacing**: Per ASME B31.1/B31.3 - **Thermal Expansion**: Allow for adequate expansion - **Insulation**: Compatible with standard high-temperature materials --- ### 9. Quality Assurance **Standard Testing:** - Hydrostatic or pneumatic testing - Eddy current or ultrasonic examination - Dimensional verification per ASTM standards - Chemical and mechanical certification **Special Requirements:** - 100% radiography for critical applications - PMI (Positive Material Identification) - Surface contamination testing - High-temperature performance testing --- ### 10. Technical Advantages - **Excellent high-temperature strength** up to 980°C - **Outstanding oxidation resistance** in air and combustion atmospheres - **Good resistance to thermal fatigue** - **Excellent structural stability** under thermal cycling - **Good fabricability and weldability** - **Long service life** in aggressive high-temperature environments --- ### 11. Corrosion Resistance Properties - **Oxidation Resistance**: Excellent to 980°C - **Carburization Resistance**: Good - **Sulfidation Resistance**: Moderate to 815°C - **Chloride Attack**: Good resistance --- **Note:** Multimet N155 Pipe offers excellent performance for high-temperature piping systems where conventional materials cannot withstand the extreme operating conditions. The combination of high strength, excellent oxidation resistance, and good fabricability makes it suitable for the most demanding applications. Consult with our engineering team for specific pressure-temperature ratings and application recommendations.

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 2290 gallon liquid totes Special package is available on request.