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

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

**Technical Data Sheet: Cobalt Alloy 6B / Stellite 6B Pipe (UNS R30016)** **1.0 Product Overview** Cobalt Alloy 6B Pipe, commercially known as Stellite 6B Pipe (UNS R30016), is a cobalt-chromium-tungsten superalloy manufactured in tubular form. This product combines exceptional wear resistance, excellent corrosion resistance, and maintained mechanical properties at elevated temperatures, making it ideal for handling abrasive slurries, corrosive fluids, and high-temperature gases in severe service conditions across various industries. **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 | | Specific Heat | 420 J/kg·K | 0.10 Btu/lb·°F | 21°C | **4.0 Mechanical Properties** **4.1 Typical Properties (Centrifugally 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% - Compressive Strength: 1750-2050 MPa (255-300 ksi) **4.2 Pressure & Temperature Ratings** - Maximum Working Pressure: 100 bar (1450 psi) at 20°C - Temperature Limit: 980°C (1800°F) for oxidation resistance - Pressure derating above 400°C (750°F) **5.0 Product Specifications** **5.1 Standard Pipe Sizes** - **Diameter Range:** 25 mm to 600 mm OD (1" to 24") - **Wall Thickness:** 3 mm to 50 mm (0.12" to 2") - **Length:** 1000 mm to 3000 mm (40" to 120") - **Tolerance:** Per ASTM A494 **5.2 Manufacturing Methods** - Centrifugal casting (most common) - Static casting - Hollow bar machining - Welded and heat treated (special cases) **6.0 Manufacturing Processes** **6.1 Centrifugal Casting Process** - Horizontal or vertical centrifugal casting - Controlled cooling rates - Machining of ID and OD surfaces - Non-destructive testing **6.2 Quality Control** - Ultrasonic testing for internal defects - Dimensional verification - Hardness testing - Pressure testing when required **7.0 Heat Treatment** **7.1 Standard Treatments** - Stress Relieving: 650-750°C (1200-1380°F) for 1-2 hours - Solution Treatment: 1190-1230°C (2175-2245°F) - optional - Slow cooling after stress relieving **7.2 Special Considerations** - Uniform heating to prevent distortion - Protective atmosphere recommended - Stress relief after welding or heavy machining **8.0 Product Applications** **8.1 Chemical Processing** - Abrasive slurry handling pipes - Acid transfer lines - Reactor feed pipes - Mixer and agitator sleeves **8.2 Oil & Gas Industry** - Mud pump liners - Choke and kill lines - Valve trim components - Flow control elements **8.3 Power Generation** - Ash handling systems - Pump casings and sleeves - Bearing surfaces - Thermal spray application pipes **8.4 Mining & Mineral Processing** - Hydrocyclone liners - Slurry transport pipes - Pump components - Classifier parts **9.0 International Standards & Specifications** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | ASTM International | ASTM A494 | Cobalt Alloy Castings | | ASME | SA494 | Boiler and Pressure Vessel Code | | DIN | 17445 | Cobalt Alloy Castings | | UNS | R30016 | Unified Numbering System | | ISO | 5832-4 | Implants for Surgery | **10.0 Fabrication & Installation** **10.1 Machining Guidelines** - Use carbide or ceramic cutting tools - Positive rake angles recommended - Low cutting speeds (10-20 m/min) - Heavy, consistent feeds - Copious coolant for grinding operations **10.2 Welding & Joining** - Weldable using matching filler metals - GTAW process recommended - Pre-heat to 300-400°C - Post-weld stress relief at 650°C - Limited to non-pressure applications **11.0 Corrosion & Wear Performance** **11.1 Corrosion Resistance** - Excellent resistance to sulfuric acid - Good resistance to phosphoric acid - Moderate hydrochloric acid resistance - Outstanding cavitation erosion resistance **11.2 Wear Resistance** - Exceptional abrasion resistance - Excellent metal-to-metal wear - Superior galling resistance - Good erosion-corrosion resistance **12.0 Quality Assurance** **12.1 Testing Requirements** - Chemical composition analysis - Mechanical property testing - Non-destructive examination - Dimensional verification - Pressure testing (when specified) **12.2 Certification** - Material Test Certificate 3.1 per EN 10204 - Full traceability to heat lot - NDE reports - Heat treatment records Cobalt Alloy 6B Pipe (Stellite 6B) offers unparalleled performance in handling abrasive, corrosive, and high-temperature fluids. Its unique combination of wear resistance, corrosion resistance, and mechanical properties at elevated temperatures makes it the material of choice for the most demanding piping applications where conventional materials would fail prematurely. The centrifugal casting process ensures uniform properties and excellent surface characteristics throughout the pipe length.

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 2342 gallon liquid totes Special package is available on request.