Cobalt Alloy 6b,Stellite 6b Forgings,UNS R30016,E FORU

British Specs:，American Specs: AMS 5894 Bar, Sheet, Plate，German Specs:

**Technical Data Sheet: Cobalt Alloy 6B / Stellite 6B Forgings (UNS R30016)** **1.0 Product Overview** Cobalt Alloy 6B Forgings, commercially known as Stellite 6B Forgings (UNS R30016), represent the highest quality product form of this cobalt-chromium-tungsten superalloy. Through controlled forging processes, the material develops optimized grain structure, enhanced mechanical properties, and superior directional strength, making it ideal for critical components subjected to extreme wear, corrosion, and high-temperature conditions. **2.0 Chemical Composition** | Element | Content (%) | Primary Function | |---------|-------------|------------------| | Co | Balance | Matrix Element, provides inherent wear resistance | | Cr | 27.0-32.0 | Corrosion & Oxidation Resistance, forms carbides | | W | 3.0-5.0 | Solid Solution Strengthener, enhances hot hardness | | C | 0.9-1.4 | Primary carbide former for wear resistance | | Si | 1.0 max | Deoxidizer, improves fluidity | | Fe | 3.0 max | - | | Ni | 3.0 max | Austenite stabilizer | | Mn | 1.0 max | Deoxidizer | | Mo | 1.0 max | Secondary strengthener | **3.0 Physical Properties** | Property | Metric Value | Imperial Value | Condition | |----------|--------------|----------------|-----------| | Density | 8.53 g/cm³ | 0.308 lb/in³ | Room Temperature | | Melting Range | 1290-1395°C | 2350-2540°F | - | | Thermal Conductivity | 14.9 W/m·K | 103.0 Btu·in/(hr·ft²·°F) | 21°C | | Mean Coefficient of Thermal Expansion | 14.2 × 10⁻⁶/°C | 7.9 × 10⁻⁶/°F | 20-540°C | | Modulus of Elasticity | 211 GPa | 30.6 × 10⁶ psi | Room Temperature | **4.0 Mechanical Properties** **4.1 Typical Forging Properties** - Hardness: 39-46 HRC - Ultimate Tensile Strength: 760-930 MPa (110-135 ksi) - Yield Strength (0.2% Offset): 550-690 MPa (80-100 ksi) - Elongation: 2-4% - Reduction in Area: 3-6% - Impact Strength: 15-25 J (11-18 ft-lb) **4.2 Enhanced Forging Characteristics** - Superior fatigue strength - Improved impact resistance - Better ductility compared to cast forms - Enhanced structural integrity - Directional property optimization **5.0 Forging Processes** **5.1 Manufacturing Methods** - Open die forging for large components - Closed die forging for complex shapes - Press forging for controlled deformation - Isothermal forging for precision parts - Ring rolling for circular components **5.2 Forging Temperature Range** - Heating Temperature: 1150-1200°C (2100-2190°F) - Forging Temperature: 1050-1150°C (1920-2100°F) - Minimum Forging Temperature: 950°C (1740°F) **6.0 Product Applications** **6.1 Valve Industry** - Forged valve trim components - Gate valve wedges and seats - Ball valve seats and stems - Control valve plugs and cages **6.2 Pump Components** - Forged pump shafts - Sleeve bearings - Impeller hubs - Wear rings and bushings **6.3 Special Applications** - Aerospace bearing components - Chemical reactor parts - Oil field tool joints - High-temperature fasteners **7.0 Heat Treatment** **7.1 Standard Heat Treatments** - Solution Treatment: 1190-1230°C (2175-2245°F) - Stress Relieving: 650-750°C (1200-1380°F) - Controlled cooling rates - Protective atmosphere recommended **7.2 Microstructure Control** - Optimized carbide distribution - Controlled grain growth - Homogeneous microstructure - Minimal segregation **8.0 International Standards & Specifications** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | ASTM International | ASTM A494 | Cobalt Alloy Castings and Forgings | | AMS | AMS 5385 | Cobalt Alloy Forgings | | ASME | SA494 | Boiler and Pressure Vessel Code | | UNS | R30016 | Unified Numbering System | | DIN | 2.4778 | German Material Number | **9.0 Quality Assurance** **9.1 Testing Requirements** - Chemical composition verification - Mechanical property testing - Ultrasonic testing per ASTM A388 - Liquid penetrant inspection - Macro and micro examination **9.2 Certification** - Mill Test Certificates per EN 10204 3.2 - Full traceability from melt to finished forging - Forging process documentation - Heat treatment records **10.0 Design Advantages** **10.1 Mechanical Superiority** - 15-20% higher tensile strength than cast forms - Improved impact resistance - Better fatigue performance - Enhanced structural reliability **10.2 Economic Benefits** - Reduced material waste - Near-net shape capabilities - Improved production yield - Lower total lifecycle cost **11.0 Machining & Fabrication** **11.1 Machining Guidelines** - Use carbide or ceramic tools - Positive rake angles essential - Low speeds with heavy feeds - Copious coolant for grinding - Rigid tooling required **11.2 Special Considerations** - Stress relieve after rough machining - Avoid sharp corners and notches - Consider grain direction in design - Allow for grinding stock **12.0 Performance Benefits** **12.1 Enhanced Properties** - Superior directional strength - Improved fatigue resistance - Better impact toughness - Enhanced stress rupture properties **12.2 Reliability Features** - Reduced inspection requirements - Consistent quality and properties - Predictable performance - Extended service life Cobalt Alloy 6B Forgings (Stellite 6B) provide the ultimate combination of wear resistance, mechanical properties, and reliability for critical components in severe service applications. The forging process enhances the inherent properties of this premium cobalt-based superalloy, delivering superior performance where failure is not an option. These characteristics make Stellite 6B forgings the material of choice for the most demanding applications across aerospace, chemical processing, oil and gas, and power generation industries.

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 2348 gallon liquid totes Special package is available on request.