Alloy 25 / L605,Haynes 25 Other/Similar Specs,UNS R30605,E FORU

British Specs:，American Specs:AMS 5537 Sheet AMS 5759 Bar & Rod AMS 5796 Welding wire AMS 5797 Covered welding rod，German Specs:

### **Technical Data Sheet: Alloy 25 / L605 / Haynes 25 (UNS R30605) & Similar Specifications** --- #### **1. Overview** **Alloy 25** (also known as **L605**, **Haynes 25**, or **UNS R30605**) is a solid-solution strengthened cobalt-chromium-tungsten-nickel superalloy renowned for its exceptional high-temperature strength, outstanding oxidation resistance, and excellent wear performance. This datasheet covers the comprehensive specifications and compares similar alloys to help in material selection and application engineering. The alloy maintains its mechanical properties up to 980°C (1800°F) and offers superior resistance to sulfidation and hot corrosion, making it suitable for extreme environment applications across aerospace, medical, and industrial sectors. --- #### **2. Chemical Composition (Typical Weight %)** | Element | Alloy 25/L605 | Haynes 188 | Stellite 6B | UMCo-50 | |---------|---------------|------------|-------------|---------| | **Cobalt (Co)** | Balance | Balance | Balance | - | | **Chromium (Cr)** | 19.0-21.0 | 20.0-24.0 | 28.0-32.0 | 26.0-29.0 | | **Tungsten (W)** | 14.0-16.0 | 13.0-16.0 | 3.0-5.0 | - | | **Nickel (Ni)** | 9.0-11.0 | 20.0-24.0 | 2.0-3.0 | Balance | | **Iron (Fe)** | ≤3.0 | ≤3.0 | ≤3.0 | Balance | | **Manganese (Mn)** | 1.0-2.0 | 1.0-2.0 | ≤1.0 | - | | **Silicon (Si)** | 0.30-0.60 | 0.20-0.50 | 1.0-2.0 | - | | **Carbon (C)** | 0.05-0.15 | 0.05-0.15 | 1.0-1.5 | - | | **Lanthanum (La)** | - | 0.03-0.15 | - | - | | **Molybdenum (Mo)** | - | - | - | - | --- #### **3. Physical Properties Comparison** | Property | Alloy 25/L605 | Haynes 188 | Stellite 6B | UMCo-50 | |----------|---------------|------------|-------------|---------| | **Density (g/cm³)** | 9.13 | 9.13 | 8.61 | 8.21 | | **Melting Range (°C)** | 1330-1410 | 1325-1360 | 1290-1425 | 1380-1430 | | **Thermal Conductivity (W/m·K)** | 9.6 | 10.3 | 14.6 | 12.5 | | **CTE (μm/m·K, 20-100°C)** | 12.5 | 12.2 | 11.9 | 13.8 | | **Specific Heat (J/kg·K)** | 420 | 430 | 410 | 460 | | **Magnetic Permeability** | Non-magnetic | Non-magnetic | Slightly magnetic | Magnetic | --- #### **4. Mechanical Properties Comparison** **Room Temperature (Annealed Condition):** | Property | Alloy 25/L605 | Haynes 188 | Stellite 6B | UMCo-50 | |----------|---------------|------------|-------------|---------| | **Tensile Strength (MPa)** | 950-1200 | 965-1240 | 890-1050 | 580-720 | | **Yield Strength (MPa)** | 450-600 | 460-620 | 520-650 | 280-350 | | **Elongation (%)** | 50-60 | 50-65 | 8-15 | 30-45 | | **Hardness (HRB)** | 95-105 | 90-100 | 30-40 HRC | 80-90 | **High-Temperature Capability:** - **Alloy 25/L605**: Excellent strength to 980°C, oxidation resistance to 1150°C - **Haynes 188**: Superior oxidation resistance to 1200°C, better thermal stability - **Stellite 6B**: Excellent wear resistance, moderate high-temperature strength - **UMCo-50**: Good oxidation resistance, lower strength at elevated temperatures --- #### **5. International Standards & Specifications** **Alloy 25/L605 Primary Specifications:** - **ASTM**: F90 - **AMS**: 5537 (Sheet/Strip), 5759 (Bar/Forgings) - **UNS**: R30605 - **EN**: 2.4964 - **ASME**: SB-574 **Similar Alloy Specifications:** - **Haynes 188**: UNS R30188, AMS 5608 - **Stellite 6B**: UNS R30016, AMS 5385 - **UMCo-50**: UNS R30050, DIN 2.4776 --- #### **6. Product Applications & Selection Guide** **Aerospace Applications:** - **Alloy 25/L605**: Turbine blades, combustion chambers, afterburner components - **Haynes 188**: Combustor liners, transition ducts, exhaust systems - **Stellite 6B**: Wear pads, bushings, bearing surfaces - **UMCo-50**: Furnace components, heat treatment fixtures **Industrial Applications:** - **Alloy 25/L605**: High-temperature fasteners, valve components - **Haynes 188**: Heat exchangers, radiant tubes - **Stellite 6B**: Cutting tools, wear-resistant surfaces - **UMCo-50**: Chemical processing equipment **Medical Applications:** - **Alloy 25/L605**: Orthopedic implants, surgical instruments - **Stellite 6B**: Dental implants, joint replacement components --- #### **7. Fabrication Characteristics** **Machinability Rating (Compared to Wrought 316 Stainless Steel):** - Alloy 25/L605: 25% - Haynes 188: 30% - Stellite 6B: 20% - UMCo-50: 45% **Weldability:** - **Alloy 25/L605**: Excellent (TIG, MIG, Laser) - **Haynes 188**: Excellent with matching filler - **Stellite 6B**: Good with specialized procedures - **UMCo-50**: Fair, requires pre/post-heat treatment **Forming Characteristics:** - All alloys require hot forming above 1000°C - Alloy 25 and Haynes 188 offer better cold formability - Stellite 6B has limited formability due to high hardness --- #### **8. Selection Considerations** **Choose Alloy 25/L605 when:** - Optimal balance of high-temperature strength and oxidation resistance required - Non-magnetic properties are essential - Good fabricability and weldability needed - Medical implant compatibility required **Consider Alternatives when:** - **Haynes 188**: Higher temperature oxidation resistance needed (>1150°C) - **Stellite 6B**: Superior wear resistance is primary requirement - **UMCo-50**: Lower cost option for moderate temperature applications --- #### **9. Quality Assurance & Standards Compliance** All materials supplied with: - Mill test certificates per EN 10204 3.1/3.2 - Chemical analysis verification - Mechanical property certification - Traceability to original melt - Compliance with relevant ASTM, AMS, and ISO standards --- **Note**: This technical comparison provides general guidelines. Material selection should be based on specific application requirements, environmental conditions, and life cycle considerations. Consult with our technical team for detailed application engineering support and material verification testing.

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 2206 gallon liquid totes Special package is available on request.