Multimet N155,Multimet Fittings,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 Fittings / UNS R30155 **Iron-Nickel-Chromium-Cobalt Superalloy Fittings** --- ### 1. Product Overview **Multimet N155 Fittings** (UNS R30155) are precision-engineered components 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)**. These fittings maintain outstanding mechanical properties and provide reliable performance in critical fluid handling applications across aerospace, power generation, and industrial sectors. --- ### 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 **Pressure-Temperature Ratings:** - **Maximum Working Pressure**: Varies with fitting size and configuration - **Temperature Range**: -250°C to +980°C (-420°F to +1800°F) - **Excellent creep and stress rupture properties** --- ### 5. Product Range & Specifications **Available Fitting Types:** - **Elbows**: 45°, 90°, 180° - **Tees**: Equal and Reducing - **Reducers**: Concentric and Eccentric - **Caps** and **Stub Ends** - **Crosses** and **Laterals** - **Union** and **Coupling** fittings **Size Range:** - **Diameter**: 1/8" to 12" NPS - **Wall Thickness**: Schedule 5S to XXS - **Connection Types**: Buttweld, Socket Weld, Threaded **Standards Compliance:** - **ASME B16.9**: Factory-Made Wrought Buttwelding Fittings - **ASME B16.11**: Forged Steel Fittings, Socket-Welding and Threaded - **ASME B16.28**: Wrought Steel Buttwelding Short Radius Elbows and Returns - **MSS SP-43**: Wrought Stainless Steel Buttwelding Fittings --- ### 6. Applications **Aerospace & Defense:** - Jet engine exhaust systems - Afterburner fuel manifolds - Aircraft hydraulic systems - High-temperature air systems **Power Generation:** - Gas turbine fuel circuits - Heat recovery systems - Boiler feed systems - Steam turbine piping **Industrial Processing:** - Chemical process piping - Refinery heater systems - High-temperature heat exchangers - Furnace gas systems **Other Applications:** - Petrochemical plants - Nuclear instrumentation - Semiconductor manufacturing - Heat treating equipment --- ### 7. International Standards | Standard Type | Standard Number | Specification | |---------------|-----------------|---------------| | **UNS** | R30155 | Material designation | | **ASTM** | B366 | Factory-made wrought fittings | | **ASME** | SB-366 | Pressure vessel applications | | **ASTM** | B572 | Rod and bar (raw material) | | **AMS** | 5768 | Bar, forgings, and rings | --- ### 8. Fabrication & Installation **Manufacturing Methods:** - Hot forging and machining - Precision investment casting - CNC machining from bar stock - Special forming processes **Welding Requirements:** - **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 **Installation Guidelines:** - **Proper Alignment**: Critical during installation - **Support Requirements**: Adequate for system weight - **Thermal Expansion**: Allow for proper clearance - **Follow applicable piping codes** (ASME B31.1, B31.3) --- ### 9. Quality Assurance **Testing & Certification:** - Material traceability documentation - Dimensional verification per applicable standards - Liquid penetrant or magnetic particle inspection - Pressure testing as required - PMI (Positive Material Identification) verification **Quality Standards:** - ISO 9001:2015 certified manufacturing - ASME Quality System Certificate - PED 2014/68/EU certified - NACE MR0175 compliant **Documentation:** - Mill Test Certificate EN 10204 3.1/3.2 - Material Test Reports - Heat Treatment Records - Non-Destructive Testing Reports --- ### 10. Technical Advantages - **Excellent high-temperature strength** up to 980°C - **Outstanding oxidation resistance** in air and combustion atmospheres - **Good thermal fatigue resistance** - **Excellent structural stability** under thermal cycling - **Good fabricability and weldability** - **Long service life** in aggressive high-temperature environments - **Reliable performance** in critical systems --- ### 11. Special Considerations **Pressure-Temperature Ratings:** - Consult manufacturer for specific ratings - Ratings vary with fitting size and configuration - Consider thermal expansion in system design **High-Temperature Service:** - Maximum continuous service: 980°C (1800°F) - Proper support for thermal cycling applications - Allow for adequate expansion clearance --- **Note:** Multimet N155 Fittings offer excellent performance for high-temperature piping systems where oxidation resistance and elevated temperature strength are required. All fittings are supplied with full material certification and are manufactured according to applicable international standards. Custom configurations and special requirements are available upon request. Consult with our engineering team for specific application recommendations and technical support.

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 2295 gallon liquid totes Special package is available on request.