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

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

**Technical Data Sheet: Cobalt Alloy 6B / Stellite 6B Tube (UNS R30016)** **1.0 Product Overview** Cobalt Alloy 6B Tube, commercially known as Stellite 6B Tube (UNS R30016), is a cobalt-chromium-tungsten superalloy manufactured in tubular form with precise dimensional control. This product combines exceptional wear resistance, excellent corrosion resistance, and maintained mechanical properties at elevated temperatures, making it ideal for applications requiring reliable performance in severe service conditions where both internal and external wear resistance are critical. **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 | | Electrical Resistivity | 0.87 μΩ·m | 33.8 μΩ·in | 21°C | **4.0 Mechanical Properties** **4.1 Typical Properties (As-Cast or Wrought)** - 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% (cast), 3-8% (wrought) - Compressive Strength: 1750-2050 MPa (255-300 ksi) **4.2 Special Tube Properties** - Excellent internal and external wear resistance - Good pressure containment capability - Maintains dimensional stability at high temperatures - Superior resistance to thermal cycling **5.0 Product Specifications** **5.1 Standard Tube Sizes** - **Outside Diameter:** 6 mm to 150 mm (0.25" to 6") - **Wall Thickness:** 1 mm to 25 mm (0.04" to 1") - **Length:** Up to 6000 mm (240") - **Tolerance:** ±0.1 mm on OD, ±0.05 mm on wall **5.2 Manufacturing Methods** - Centrifugal casting - Extruded and drawn - Welded and redrawn - Machined from solid bar **6.0 Manufacturing Processes** **6.1 Production Methods** - Centrifugal casting for larger diameters - Cold drawing for precise dimensions - Pilger milling for heavy walls - Quality inspection at each production stage **6.2 Surface Conditions** - As-cast surface - Machined and ground - Polished (ID and/or OD) - Special coatings available **7.0 Heat Treatment** **7.1 Standard Heat Treatments** - Stress Relieving: 650-750°C (1200-1380°F) for 1-2 hours - Solution Annealing: 1190-1230°C (2175-2245°F) - for wrought material - Slow furnace cooling recommended **7.2 Processing Considerations** - Avoid rapid temperature changes - Use protective atmosphere above 400°C - Uniform heating essential to prevent distortion - Stress relieve after forming or welding **8.0 Product Applications** **8.1 Mechanical Applications** - Bushing and sleeve bearings - Hydraulic cylinder rods - Guide sleeves and liners - Wear sleeves for rotating equipment - Thermocouple protection tubes **8.2 Fluid Handling** - Valve trim components - Pump sleeves and shafts - Metering element housings - Nozzles and orifices - Spray bars and headers **8.3 Industry Specific Uses** - **Chemical Processing:** Reactor thermowells, agitator sleeves - **Oil & Gas:** Downhole tool components, wear sleeves - **Power Generation:** Steam turbine components, bearing sleeves - **Aerospace:** Actuator cylinders, high-temperature bushings - **Medical:** Surgical instrument components **9.0 International Standards & Specifications** | Standard Organization | Standard Number | Description | |----------------------|-----------------|-------------| | ASTM International | ASTM F90 | Cobalt-Chromium-Tungsten Alloy Tube | | AMS | AMS 5792 | Cobalt Alloy Tubing | | ISO | 5832-5 | Implants for Surgery - Cobalt Alloys | | UNS | R30016 | Unified Numbering System | | DIN | 2.4778 | German Material Number | **10.0 Fabrication & Processing** **10.1 Machining Guidelines** - Use carbide or ceramic cutting tools - Maintain positive rake angles (5-15°) - Recommended cutting speed: 10-20 m/min - Use 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 required - Post-weld stress relief at 650°C - Suitable for sleeve and repair applications **11.0 Quality Assurance** **11.1 Testing & Inspection** - Chemical composition verification - Hardness testing (HRC scale) - Ultrasonic testing for internal defects - Dimensional accuracy verification - Surface quality assessment - Eddy current testing available **11.2 Certification** - Mill Test Certificates per EN 10204 3.1 - Full material traceability - Chemical analysis reports - Mechanical test certificates - Non-destructive testing reports **12.0 Performance Characteristics** **12.1 Wear & Corrosion Performance** - Exceptional metal-to-metal wear resistance - Superior galling resistance - Excellent abrasion resistance - Good corrosion resistance in various media - Outstanding cavitation erosion resistance **12.2 Design Considerations** - Minimum recommended wall thickness: 1.5 mm - Avoid sharp corners and stress concentrators - Consider thermal expansion in assembly designs - Allow for grinding stock in tolerances Cobalt Alloy 6B Tube (Stellite 6B) provides exceptional performance in applications requiring precise tubular components with superior wear and corrosion resistance. Its availability in various manufacturing methods and sizes makes it suitable for everything from small precision instruments to large industrial components. The combination of maintained hardness at elevated temperatures, excellent wear characteristics, and good fabricability establishes this material as the premier choice for demanding tubular applications across multiple 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 2343 gallon liquid totes Special package is available on request.