Product Specification: LION® R30012 (Stellite 12 Type)
LION® R30012 is an intermediate cobalt-chromium-tungsten alloy that bridges the gap between the general-purpose Stellite 6 and the high-abrasion Stellite 1. It is engineered for applications where higher resistance to sliding wear and abrasion is required without sacrificing too much impact strength.
1. Detailed Chemical Composition (Weight %)
| Co | Cr | W | C | Ni | Fe | Si | Mn |
|---|---|---|---|---|---|---|---|
| Baki | 27.0-32.0 | 7.5-9.5 | 1.4-2.0 | ≤3.0 | ≤3.0 | ≤2.0 | ≤1.0 |
2. Hot Hardness (Hardness vs. Temperature)
R30012 maintains its abrasive resistance even at “red heat” conditions:
- Room Temp: 45 – 51 HRC
- 200°C (390°F): 42 HRC
- 400°C (750°F): 38 HRC
- 600°C (1110°F): 32 HRC
- 700°C (1290°F): 28 HRC
3. Mechanical & Physical Constants
- Density: 8.53 g/cm³ (0.308 lb/in³)
- Melting Range: 1200°C – 1365°C (2190°F – 2490°F)
- Compressive Strength: 1770 MPa (256,000 psi)
- Ultimate Tensile Strength: 740 MPa (107,000 psi)
- Thermal Conductivity: 15.0 W/m·K (at Room Temp)
- Elastic Modulus (Young’s): 231 GPa (33.5 x 10⁶ psi)
- Coefficient of Thermal Expansion: 12.3 μm/m·K (20-500°C)
4. Primary Applications
Ideal for components subjected to both severe abrasion and thermal stress:
- Timber Industry: Saw tips and cutters for high-speed wood processing.
- Textile & Plastics: Knives and blades for cutting synthetic fibers and polymers.
- Fluid Handling: High-wear pump vanes, bearing bushes, and homogenizer valves.
- Glass Industry: Narrow neck glass mold plungers and guide plates.
- Engine Parts: Hardfacing for heavy-duty exhaust valves and rotor blade tips.
5. Processing & Machining Guidance
- Hardfacing: Highly suitable for PTA (Plasma Transferred Arc) and Laser Cladding. A preheat of 400°C – 500°C is required to minimize the risk of stress cracking.
- Machining: Difficult to machine. Use carbide-tipped tools with low speeds and heavy feeds. Finish-grinding with silicon carbide or diamond wheels is recommended.
Industry Cross-Reference: UNS R30012 | Stellite 12 | AMS 5391 (Partial Match).
Data compiled from ASM International and industry standard metallurgical data sheets.