Product Specification: LION® R30031 (Stellite 31 / X-40 Type)
LION® R30031 is a high-strength, cobalt-base superalloy designed for the most demanding high-temperature environments. Unlike wear-focused Tribaloy grades, R30031 (traditionally known as Stellite 31 or X-40) is optimized for creep resistance Dan stress-rupture strength at elevated temperatures up to 1000°C.
1. Key Technical Features
- Superior Stress-Rupture Life: Outperforms many nickel-based alloys in high-temperature stress environments.
- Thermal Fatigue Resistance: Excellent durability under rapid thermal cycling and mechanical shock.
- High-Temperature Oxidation: Resistant to scaling and environmental attack in atmospheres up to 1150°C (2100°F).
- Balanced Ductility: Offers better elongation (approx. 10%) than high-hardness wear alloys, reducing the risk of catastrophic failure under impact.
2. Technical Specifications (Nominal Composition)
| Elemen | Symbol | Weight % (Typical) |
|---|---|---|
| Kobalt | Co | Keseimbangan |
| Kromium | Cr | 24.5 – 26.5% |
| Nikel | Ni | 9.5 – 11.5% |
| Tungsten | W | 7.0 – 8.0% |
| Karbon | C | 0.45 – 0.55% |
| Besi | Fe | ≤ 2.0% |
3. Mechanical & Physical Properties
- Hardness: 25 – 35 HRC
- Tensile Strength (UTS): ≥ 740 MPa
- Density: 8.61 g/cm³
- Elongation: ≥ 10%
Industry Cross-Reference: UNS R30031 | AMS 5382 | Stellite 31 / X-40 Type.
Data verified against ASM International and Kennametal Stellite technical specifications.