Multimet N155,Multimet ,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 / Multimet N155 / UNS R30155 **Iron-Nickel-Chromium-Cobalt Superalloy** --- ### 1. Product Overview **Multimet N155** (UNS R30155) is an iron-nickel-chromium-cobalt superalloy designed for high-temperature service up to **980°C (1800°F)**. This alloy combines excellent high-temperature strength, outstanding oxidation resistance, and good fabricability, making it suitable for gas turbine components, heat treatment equipment, and other high-temperature applications. --- ### 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 | | **Coefficient of Thermal Expansion** | 14.5 μm/m·°C (20–100°C) | | **Electrical Resistivity** | 1.05 μΩ·m | | **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 Forms & Applications **Available Forms:** - Bar, rod, and wire - Sheet, plate, and strip - Forgings and rings - Tubing and pipe **Typical Applications:** - **Aerospace**: Gas turbine components, combustion chambers - **Industrial**: Heat treatment fixtures, furnace components - **Power Generation**: Gas turbine parts, boiler components - **Chemical Processing**: High-temperature reactor components --- ### 6. International Standards | Standard Type | Standard Number | Specification | |---------------|-----------------|---------------| | **UNS** | R30155 | Material designation | | **ASTM** | B435 | Sheet, plate, and strip | | **ASTM** | B572 | Rod and bar | | **AMS** | 5768 | Bar and forgings | --- ### 7. Heat Treatment **Solution Treatment:** - 1175–1205°C (2150–2200°F) - Rapid cooling (water quench) **Aging Treatment:** - 730–760°C (1350–1400°F) for 16 hours - Air cool --- ### 8. Fabrication Notes **Machining:** - Use positive rake carbide tools - Moderate speeds with heavy feeds - Adequate coolant required **Welding:** - All conventional welding methods suitable - Post-weld heat treatment recommended - Use matching filler metal **Cold Working:** - Good cold formability in annealed condition - Intermediate annealing may be required --- ### 9. Corrosion Resistance - **Excellent oxidation resistance** up to 980°C - **Good carburization resistance** - **Resistant to sulfur-containing atmospheres** - **Good thermal fatigue resistance** --- ### 10. Key Advantages - **Excellent high-temperature strength** - **Outstanding oxidation resistance** - **Good fabricability and weldability** - **Resistant to thermal fatigue** - **Maintains properties** at elevated temperatures - **Proven performance** in demanding applications --- **Note:** Multimet N155 is a versatile high-temperature alloy suitable for applications requiring long-term stability at elevated temperatures. Proper heat treatment is essential to achieve optimal properties. Consult with our technical team for specific application recommendations and processing 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 2287 gallon liquid totes Special package is available on request.