Wait
What is
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Never mind, I just asked ChatGPT: it said this (I’d never heard of this steel before, sounds really interesting!)
**S390 steel** is a high-performance, premium-grade **powder metallurgy tool steel** known for its exceptional wear resistance, toughness, and edge retention. It belongs to the family of **high-speed steels (HSS)**, often used in industrial applications that require cutting tools to withstand high temperatures, abrasive environments, and heavy-duty use.
### Key Features of S390 Steel:
1. **Composition**:
- S390 contains a high amount of carbon, tungsten, and vanadium, making it a high-carbon, high-alloy steel. These elements contribute to its hardness and wear resistance.
- Typical composition includes:
- **Carbon**: Around 2.0%
- **Chromium**: Around 4.8%
- **Vanadium**: Around 5.0%
- **Tungsten**: Around 10.5%
- **Molybdenum**: Around 2.0%
- **Cobalt**: Around 8.0%
2. **Hardness**: S390 can achieve extremely high hardness levels (around 64-68 HRC) after heat treatment, which is essential for maintaining sharp cutting edges over prolonged periods of use.
3. **Wear Resistance**: Thanks to the high amount of vanadium carbides in its structure, S390 offers superb wear resistance, making it ideal for cutting, drilling, or other tasks where the tool is subjected to friction and abrasion.
4. **Edge Retention**: S390 holds its edge exceptionally well, even under heavy use or in challenging environments, which is why it's often used for industrial cutting tools and in high-end knife making.
5. **Applications**:
- **Cutting Tools**: S390 is used for making high-end cutting tools such as drills, saw blades, and industrial cutters that require prolonged edge sharpness.
- **Knives**: Due to its hardness and wear resistance, S390 is also highly prized by custom knife makers for producing premium knives, especially those designed for heavy-duty or extreme-use scenarios.
### Pros and Cons of S390 Steel:
- **Pros**:
- Exceptional hardness and edge retention.
- Outstanding wear resistance.
- Good high-temperature stability, making it suitable for cutting tools.
- **Cons**:
- More difficult to sharpen due to its extreme hardness.
- Not as corrosion-resistant as other stainless steels, meaning it requires care to avoid rust.
- Can be brittle if not heat-treated properly, which may affect its toughness.
In summary, S390 is a top-tier, highly specialized steel used in applications requiring extreme performance, making it popular in industries where durability and precision are paramount.