Alloy 260， Forgings，UNS N03260,E FORU

British Specs:，American Specs: AMS 5890 Bar and Forgings，German Specs:

### **Technical Datasheet: Alloy 260 (Cartridge Brass) Forgings, UNS C26000** #### **Product Overview** Alloy 260 forgings represent the premium form of 70/30 brass for high-strength applications requiring superior mechanical properties and structural reliability. The forging process enhances the alloy's inherent characteristics by refining the grain structure, eliminating porosity, and improving directional strength. This results in components with exceptional structural integrity, making them suitable for critical applications in plumbing, marine, and industrial sectors where reliability under pressure and stress is paramount. #### **Key Characteristics** - **Enhanced Mechanical Properties**: Forging process improves tensile strength, fatigue resistance, and impact toughness - **Superior Grain Structure**: Refined, continuous grain flow following component contour - **Excellent Corrosion Resistance**: Maintains good performance in freshwater, steam, and marine environments - **Good Machinability**: 100% machinability rating allows easy post-forging processing - **Pressure Tightness**: Ideal for pressurized fluid handling applications - **Excellent Wear Resistance**: Suitable for moving components and bearing surfaces #### **Chemical Composition (Weight %)** | Element | Content | Element | Content | |---------|---------|---------|---------| | Copper (Cu) | 68.5 - 71.5% | Iron (Fe) | ≤ 0.05% | | Zinc (Zn) | Remainder | Lead (Pb) | ≤ 0.07% | | Other Elements | ≤ 0.15% total | #### **Physical Properties** - **Density**: 8.53 g/cm³ (0.308 lb/in³) - **Melting Point**: 915-955°C (1680-1750°F) - **Thermal Conductivity**: 120 W/m·K - **Electrical Conductivity**: 28% IACS - **Coefficient of Thermal Expansion**: 20.2 × 10⁻⁶/°C (20-300°C) #### **Mechanical Properties (Typical Forged Condition)** | Property | Value Range | |----------|-------------| | Tensile Strength | 380 - 550 MPa (55 - 80 ksi) | | Yield Strength (0.5% Offset) | 140 - 380 MPa (20 - 55 ksi) | | Elongation | 20 - 45% | | Hardness | 75 - 95 HRB | | Fatigue Strength | 140 - 180 MPa | #### **International Standards** - **ASTM**: B283 (Copper and Copper-Alloy Die Forgings) - **ASME**: SB283 (Pressure Vessel Application) - **EN**: 12420 (Copper and copper alloys - Forgings) - **DIN**: 17660 (CuZn30) - **JIS**: H3250 (Copper and copper alloy forgings) - **ISO**: 3112 (Copper and copper alloys - Forgings) #### **Forging Process Parameters** - **Forging Temperature Range**: 700 - 800°C (1290 - 1470°F) - **Annealing Temperature**: 425 - 600°C (800 - 1110°F) - **Hot Working**: Excellent at 650 - 750°C - **Cold Working**: Good in annealed condition #### **Product Applications** **Plumbing & Fluid Handling** - High-pressure valve bodies and stems - Pump components and impellers - Pipe fittings and connectors - Water distribution system components **Marine & Offshore** - Naval hardware components - Marine valve bodies - Propeller shaft components - Underwater connector bodies **Industrial Machinery** - Gear blanks and transmission components - Heavy-duty bearing retainers - Machine tool components - Agricultural machinery parts **Automotive & Transportation** - Steering system components - Brake system parts - Transmission synchronizers - Engine valve guides #### **Quality Assurance** - Ultrasonic testing capability - Dye penetrant inspection - Radiographic examination - Pressure testing to applicable standards - Microstructure and grain size verification #### **Technical Advantages** 1. **Directional Strength**: Forging alignment provides superior mechanical properties 2. **Reliability**: Eliminates casting defects and porosity 3. **Material Utilization**: Near-net shape manufacturing reduces waste 4. **Performance Consistency**: Uniform properties throughout component #### **Disclaimer** This information provides typical characteristics and properties. Actual performance may vary based on specific forging practices, heat treatment, and service conditions. Users should consult applicable standards and conduct appropriate testing for critical applications. Compliance with local regulations and industry standards is the responsibility of the end user.

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 2816 gallon liquid totes Special package is available on request.