SKS3 Material Detailed Information
SKS3 is a cold work tool steel known for its high toughness, good wear resistance, and excellent machinability. It belongs to the same category as AISI O1 (Oil-Hardening Steel) and DIN 1.2510, making it a widely used material for cutting tools, punches, dies, and knives.
Due to its high carbon and chromium content, SKS3 offers good edge retention and dimensional stability after heat treatment.are required.
Key Features
- High Toughness: Suitable for impact-resistant tools.
- Good Wear Resistance: Maintains edge sharpness for long tool life.
- Excellent Machinability: Easy to cut and grind.
- Good Dimensional Stability: Minimal deformation after heat treatment.
- Oil-Hardening Steel: Enhances wear resistance and hardness.
Chemical Composition
| Element | Composition (%) |
| Carbon (C) | 0.90 – 1.10 |
| Chromium (Cr) | 0.50 – 1.00 |
| Manganese (Mn) | 1.00 – 1.50 |
| Silicon (Si) | 0.10 – 0.50 |
| Tungsten (W) | 0.50 – 1.20 |
| Vanadium (V) | 0.10 – 0.30 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
Mechanical Properties
| Property | Value |
| Hardness (Annealed) | ≤ 212 HB |
| Hardness (Hardened & Tempered) | 58-63 HRC |
| Tensile Strength | 1,600 – 2,000 MPa |
| Yield Strength | ~1,400 MPa |
| Elongation | 10-15% |
| Toughness | High |
| Wear Resistance | Good |
SKS3 vs. O1 vs. 1.2510
| Property | SKS3 | O1 (AISI) | 1.2510 (DIN) |
| Toughness | High | High | High |
| Wear Resistance | Good | Good | Good |
| Hardness (After Tempering) | 58-63 HRC | 58-62 HRC | 58-62 HRC |
| Dimensional Stability | Good | Good | Good |
| Machinability | Excellent | Good | Good |
Applications
SKS3 is widely used in cold work tooling and precision cutting applications, including:
- Cutting tools (knives, shears, and punches)
- Cold forging dies and forming tools
- Trimming and blanking dies
- Gauge tools and measuring instruments
- Woodworking tools (chisels, saw blades)
- Precision mechanical parts
Heat Treatment Process
Annealing
- Heat to 780–810°C, then slow cool in the furnace to improve machinability.
Hardening
- Heat to 790–820°C, hold for proper soaking time.
- Quench in oil for optimal hardness.
Tempering
- Heat at 180–250°C for high hardness.
- Heat at 350–450°C for balanced hardness and toughness.
- Final hardness: 58-63 HRC (depending on tempering temperature).
Alternative Materials
- AISI O1 (Oil-Hardening Tool Steel) – A direct equivalent with nearly identical properties.
- DIN 1.2510 (100MnCrW4) – A German equivalent with similar composition.
- D2 (1.2379, SKD11) – Higher wear resistance but lower toughness.
- SKS51 – Improved toughness compared to SKS3.
Conclusion
SKS3 is a high-quality cold work tool steel with excellent toughness, good wear resistance, and easy machinability. It is an ideal choice for cutting tools, punches, dies, and woodworking tools.
