Product Specification: LION® R30020 (Stellite 20 Type) Cobalt-Based Alloy
LION® R30020 is a premium cobalt-chromium-tungsten alloy designed for applications requiring maximum resistance to severe abrasion, erosion, and chemical corrosion. Known in the industry as Stellite 20, this grade features a high volume fraction of hard carbides (over 30%), making it one of the most wear-resistant alloys in the Stellite family.
1. Key Performance Advantages
- Superior Abrasion Resistance: High carbon and tungsten content create a microstructure optimized for resisting sliding wear and particle erosion.
- Excellent Red Hardness: Maintains its high hardness (approx. 52 HRC) even at elevated service temperatures.
- Chemical Stability: Highly resistant to aggressive chemical media, especially in environments where mechanical wear and corrosion occur simultaneously.
- Precision Performance: Ideal for components requiring a high-quality surface finish and tight dimensional tolerances under friction.
2. Technical Specifications (Nominal Composition)
| 要素 | Symbol | Weight % (Typical) |
|---|---|---|
| コバルト | コ | バランス |
| クロム | Cr | 32.0 – 34.0% |
| Tungsten | W | 17.0 – 18.5% |
| 炭素 | C | 2.4 – 2.6% |
| ニッケル | で | ≤ 2.5% |
| 鉄 | 鉄 | ≤ 3.0% |
3. Physical & Mechanical Properties
- Hardness: 48 – 55 HRC (Typical 52 HRC)
- 密度： 8.70 g/cm³
- 溶解範囲: 1230°C – 1300°C (2245°F – 2370°F)
- Impact Strength: Low (Brittle due to high carbide content)
4. 主な用途
- Industrial Wear Parts: Bearing sleeves, rotary seal rings, and centerless grinding work rests.
- 液体の取り扱い: Slurry pump components, homogenizer valve seats, and needle valves.
- Precision Tooling: Surgical needle holders and specialized cutting edges.
5. Fabrication Guidance
- 溶接： Can be applied via PTA (プラズマ転移アーク) or Laser Cladding. High preheat (approx. 500°C) is necessary to prevent cracking.
- 加工: Extremely difficult to machine. Best finished by grinding with silicon carbide or diamond wheels.
業界相互参照: UNS R30020 | Stellite 20 Type.
Produced under LION® high-performance metallurgical standards.l impact or extreme tensile stress.