Multimet N155,Multimet Bar(Round bar, Flat bar),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 Bar / UNS R30155 **Iron-Nickel-Chromium-Cobalt Superalloy - Round Bar & Flat Bar Products** --- ### 1. Product Overview **Multimet N155 Bar** (UNS R30155) is supplied in both **round bar** and **flat bar** configurations from the iron-nickel-chromium-cobalt superalloy family. These products are designed for high-temperature service up to **980°C (1800°F)** and offer an excellent combination of high-temperature strength, oxidation resistance, and good fabricability for manufacturing critical components 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 - **Creep Strength**: Excellent up to 980°C - **Oxidation Resistance**: Excellent up to 980°C --- ### 5. Product Specifications **Round Bar Specifications:** - **Diameter Range**: 5 mm to 300 mm (0.187" to 12") - **Tolerance**: h9 standard, special tolerances available - **Surface Finish**: Hot-rolled, turned, ground, or polished - **Straightness**: Standard commercial, precision available **Flat Bar Specifications:** - **Thickness**: 5 mm to 100 mm (0.187" to 4") - **Width**: 20 mm to 300 mm (0.75" to 12") - **Tolerance**: ±1% on thickness, ±2% on width - **Edge Condition**: As-rolled, milled, or machined edges **Available Conditions:** - **Solution Annealed**: Optimal for machining and forming - **Hot Finished**: As-rolled condition - **Stress Relieved**: For improved dimensional stability --- ### 6. Applications **Round Bar Applications:** - Gas turbine blades and vanes - Combustion chamber supports - High-temperature fasteners - Heat treatment fixture components **Flat Bar Applications:** - Furnace rail systems - Heat exchanger structural members - Combustion chamber brackets - High-temperature support frames **Industry Applications:** - **Aerospace**: Engine components, exhaust systems - **Power Generation**: Gas turbine parts, boiler components - **Industrial**: Heat treating fixtures, chemical processing - **Energy**: Petrochemical, refining equipment --- ### 7. International Standards | Standard Type | Standard Number | Specification | |---------------|-----------------|---------------| | **UNS** | R30155 | Material designation | | **ASTM** | B572 | Rod and Bar Specification | | **AMS** | 5768 | Bar and Forgings | | **ASME** | SB-572 | Pressure Component Applications | --- ### 8. Machining & Fabrication **Machining Characteristics:** - **Machinability Rating**: 35% (compared to 1112 steel) - **Tool Materials**: Carbide recommended - **Cutting Speeds**: 15–20 m/min for roughing - **Feed Rates**: 0.15–0.25 mm/rev - **Coolant**: Required for heavy machining operations **Forming & Welding:** - **Hot Working**: 1150–1200°C (2100–2200°F) - **Cold Working**: Good in annealed condition - **Welding Processes**: GTAW, GMAW, SMAW - **Filler Metal**: Matching composition recommended **Heat Treatment:** - **Solution Treatment**: 1175–1205°C (2150–2200°F) - **Aging Treatment**: 730–760°C (1350–1400°F) for 16 hours - **Cooling**: Water quench after solution treatment --- ### 9. Quality Assurance **Standard Testing:** - Chemical analysis certification - Tensile testing at room temperature - Hardness testing - Dimensional verification **Additional Testing Available:** - Ultrasonic examination - Macro-etch testing - Elevated temperature testing - Microstructural evaluation --- ### 10. Technical Advantages - **Excellent high-temperature strength** up to 980°C - **Outstanding oxidation resistance** in air and combustion atmospheres - **Good thermal fatigue resistance** - **Excellent fabricability** for complex components - **Good weldability** with proper procedures - **Maintains structural stability** at elevated temperatures - **Proven performance** in demanding applications --- ### 11. Special Considerations **High-Temperature Service:** - Maximum continuous service: 980°C (1800°F) - Consider thermal expansion in design - Proper support for thermal cycling applications - Allow for adequate expansion clearance **Corrosion Performance:** - **Excellent oxidation resistance** - **Good carburization resistance** - **Resistant to sulfur-containing atmospheres** - **Suitable for cyclic temperature conditions** --- **Note:** Multimet N155 Round Bar and Flat Bar products offer excellent performance for high-temperature applications where oxidation resistance and elevated temperature strength are required. The material demonstrates good machinability and can be readily fabricated into complex components. Consult with our technical team for specific application recommendations and fabrication guidance.

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 2289 gallon liquid totes Special package is available on request.