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

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

**Technical Data Sheet: Cobalt Alloy 6B / Stellite 6B Fittings (UNS R30016)** **1.0 Product Overview** Cobalt Alloy 6B Fittings, commercially known as Stellite 6B Fittings (UNS R30016), are precision-engineered fluid system components manufactured from cobalt-chromium-tungsten superalloy. These fittings are specifically designed for handling abrasive slurries, corrosive fluids, and high-temperature gases in severe service conditions where conventional materials would rapidly degrade. **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 Properties (Investment Cast)** - Hardness: 37-45 HRC - Ultimate Tensile Strength: 690-895 MPa (100-130 ksi) - Yield Strength (0.2% Offset): 480-620 MPa (70-90 ksi) - Elongation: 1-2% - Impact Strength: 10-15 J (7-11 ft-lb) **4.2 Pressure Ratings** - Maximum Working Pressure: 690 bar (10,000 psi) at 20°C - Temperature-Pressure rating per ASME B16.34 - Excellent pressure containment capability **5.0 Product Specifications** **5.1 Available Fitting Types** - **Butt Weld Fittings:** Elbows 45°/90°, tees, reducers, caps - **Socket Weld Fittings:** Unions, elbows, tees, couplings - **Threaded Fittings:** NPT, BSPT, BSPP connections - **Special Fittings:** Orifice fittings, cross fittings, laterals **5.2 Size Range** - **Diameter Range:** 1/8" to 12" NB (DN6 to DN300) - **Wall Thickness:** Schedule 10S to XXS - **Pressure Class:** 1500 lb to 4500 lb **6.0 Manufacturing Processes** **6.1 Production Methods** - Investment casting for complex shapes - Precision machining from cast blanks - Quality inspection and testing - Surface finishing and marking **6.2 Quality Control** - Liquid penetrant testing - Dimensional verification - Pressure testing - Material verification **7.0 Heat Treatment** **7.1 Standard Heat Treatments** - Stress Relieving: 650-750°C (1200-1380°F) - Solution Treatment: 1190-1230°C (2175-2245°F) when required - Controlled cooling in protective atmosphere **8.0 Product Applications** **8.1 Chemical Processing** - Abrasive slurry line fittings - Acid transfer system components - Reactor feed and discharge fittings - Mixer and agitator connections **8.2 Oil & Gas Industry** - Mud pump manifolds - Choke and kill line fittings - Valve trim components - Flow control fittings **8.3 Power Generation** - Ash handling system fittings - Pump connections and adapters - Erosion protection fittings - High-temperature gas fittings **9.0 International Standards & Specifications** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | ASTM International | ASTM A494 | Cobalt Alloy Castings | | ASME | B16.9 / B16.11 | Factory-Made Wrought Buttwelding/Socket Welding Fittings | | ASME | B16.34 | Valves-Flanged, Threaded and Welding End | | MSS | SP-79 / SP-97 | Socket Welding & Threaded Fittings | | UNS | R30016 | Unified Numbering System | **10.0 Fabrication & Installation** **10.1 Welding Guidelines** - GTAW process recommended - Matching filler metals preferred - Pre-heat 300-400°C required - Post-weld stress relief at 650°C **10.2 Installation Considerations** - Proper alignment essential - Adequate support required - Avoid excessive force during assembly - Use appropriate gaskets and seals **11.0 Performance Characteristics** **11.1 Wear & Corrosion Performance** - Exceptional erosion-corrosion resistance - Superior abrasion resistance - Excellent cavitation resistance - Good corrosion resistance in various media **11.2 Design Advantages** - Long service life in abrasive applications - Reduced maintenance requirements - Reliable performance in extreme conditions - Cost-effective despite higher initial cost **12.0 Quality Assurance** **12.1 Testing & Certification** - Pressure testing to 1.5 × working pressure - Non-destructive examination - Material certification per EN 10204 3.1 - Dimensional inspection reports - Surface finish verification Cobalt Alloy 6B Fittings (Stellite 6B) provide unmatched reliability and service life in handling abrasive, corrosive, and high-temperature fluids. Their superior wear resistance and mechanical properties make them the preferred choice for critical applications across chemical processing, oil and gas, power generation, and mining industries, offering significant advantages over conventional materials in terms of durability and maintenance cost reduction.

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 2347 gallon liquid totes Special package is available on request.