SKS11 is a high-carbon tool steel classified under Japan’s Industrial Standards (JIS). Due to its high hardness, wear resistance, and excellent machinability, it is extensively used in the production of cutting tools, molds, and mechanical components.

1. Chemical Composition

Carbon (C):0.90 - 1.00%

Silicon (Si):0.10 - 0.30%

Manganese (Mn):0.80 - 1.10%

Phosphorus (P):≤ 0.025%

Sulfur (S):≤ 0.025%

Chromium (Cr) :0.20 - 0.50%

Tungsten (W):0.50 - 1.00%

Vanadium (V):0.10 - 0.25%

Iron (Fe):Balance

2. Physical Properties

Density:7.85 g/cm³

Melting Point:1425 - 1510°C

Thermal Expansion Coefficient:11.5 µm/m·°C (20-100°C)

Thermal Conductivity:42.7 W/m·K

Electrical Resistivity :0.22 µΩ·m

3. Mechanical Properties

Tensile Strength:≥ 980 MPa

Yield Strength:≥ 785 MPa

Elongation:≥ 10%

Hardness:≥ 60 HRC (after proper heat treatment)

4. Heat Treatment Process

To further enhance its mechanical properties and wear resistance, SKS11 undergoes the following heat treatment processes:

• Annealing: Heated to 750-800°C, then slowly cooled to reduce hardness and improve machinability.

• Quenching: Heated to 800-850°C, followed by rapid cooling (oil quenching or water quenching) to increase hardness and strength.

• Tempering: Heated to 150-200°C, then cooled to reduce brittleness after quenching and improve toughness.

5. Wear Resistance

Thanks to its high carbon content and alloying elements, SKS11 offers exceptional wear resistance, making it ideal for high-wear applications.

6. Applications

• Cutting Tools: Used in the production of drill bits, milling cutters, saw blades, and other precision cutting tools.

• Molds: Suitable for stamping dies and cold-work molds, ensuring long-lasting performance.

• Mechanical Components: Applied in high-wear mechanical parts such as bearings and gears, offering durability and reliability in demanding environments.

7. Machining and Welding

• Machining: SKS11 can be processed using conventional machining methods, but due to its high hardness, carbide tools are recommended for optimal results.

• Welding: Welding methods such as arc welding and gas-shielded welding can be used; however, preheating and post-weld heat treatment are necessary to prevent cracking and ensure structural integrity.

8. Conclusion

With its exceptional hardness, wear resistance, and machinability, SKS11 is an ideal material for cutting tools, mold manufacturing, and high-wear mechanical components. When combined with precise heat treatment techniques and appropriate machining methods, it meets the rigorous demands of high-precision and high-strength industrial applications. Whether in high-wear environments or complex machining tasks, SKS11 consistently delivers outstanding performance and versatile industrial applications, making it a trusted and indispensable material in modern manufacturing.

We offer customized metal processing solutions, including round bars, sheets, round/square tubes, and coils, tailored to your needs. If you require further assistance, feel free to contact us at sale@bolaibao1.com. We look forward to your inquiries.