ASTM S4 is a high-speed steel widely used in various industries due to its excellent properties. It is a steel alloy that is highly resistant to wear and tear, has high hardness, and offers good toughness. This material is often used in manufacturing cutting tools, such as drills, taps, milling cutters, and saw blades. This blog post will investigate ASTM S4’s composition, properties, applications, and heat treatment.
ASTM S4 Composition
ASTM S4 is a high-speed steel that is composed of different elements. The significant elements of this steel are carbon, tungsten, chromium, molybdenum, and vanadium. The percentage composition of these elements may vary depending on the manufacturer. Typically, it contains 1.05% carbon, 1.1% tungsten, 4% chromium, 5% molybdenum, and 1.5% vanadium.
| C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | W(%) |
|---|---|---|---|---|---|---|
| 0.50-0.65 | 1.75-2.25 | 0.60-0.95 | ≦0.03 | ≦0.03 | ≦0.35 | ≦0.35 |
ASTM S4 Physical Properties
ASTM S4 has excellent physical properties, making it a popular choice among manufacturers. It has a 7.86 g/cm3 density and a melting point range of 1290-1380°C. It has a high thermal conductivity of 24 W/mK and a low coefficient of thermal expansion. This steel also has good electrical conductivity, making it easy to machine.
ASTM S4 Mechanical Properties
ASTM S4 offers exceptional mechanical properties compared to other types of steel. It has a high hardness rating of 64-66 HRC, which means it is highly resistant to wear and tear. This steel is also challenging, making it suitable for cutting tools that withstand high impacts. It has a tensile strength of 2900 MPa and a yield strength of 2500 MPa.
| Rp0.2 (MPa) | Rm (MPa) | Impact KV (J) |
Elongation A (%) |
A Z (%) | Delivery | Hardness HB |
|---|---|---|---|---|---|---|
| 971 (≥) | 239 (≥) | 23 | 12 | 22 | Solution & Aging, Ann, Ausaging, Q+T | 331 |
ASTM S4 Uses
ASTM S4 is a versatile material that can be used in various applications. Its high-speed tool steel properties make it a popular choice for manufacturing metal-cutting tools, such as drills, taps, milling cutters, and saw blades. It is also used for making gears, shafts, and other machine parts that must withstand high-stress conditions. In addition, it is used to produce knives and blades, especially for cutting paper, cardboard, and other materials.
ASTM S4 Heat Treatment
Heat treatment is essential in manufacturing ASTM S4 to achieve its desired properties. The typical heat treatment process involves heating the material to a temperature of 1170°C and then cooling it rapidly in oil or air. This process helps improve the steel’s hardness, toughness, and wear resistance. Proper heat treatment helps to ensure that the steel has the necessary properties for its intended use.
Conclusion
In conclusion, ASTM S4 is a high-speed steel with excellent properties for various applications. Its composition of carbon, tungsten, chromium, molybdenum, and vanadium gives it exceptional physical and mechanical properties. This material is highly resistant to wear and tear, has high hardness, good toughness, and offers good durability. It is commonly used to manufacture cutting tools, gears, shafts, and machine parts that require high-stress conditions. Proper heat treatment is essential to achieve the desired properties of this steel. With its many valuable properties, it’s no wonder that ASTM S4 is a popular choice in the manufacturing industry.
Meet Heer, a dynamic and driven writer learning tricks of her trade in the metal industry. With a background in Digital Marketing, Heer brings a unique perspective to her writing, sharing valuable insights. Apart from blogging she like reading and hiking.
