Chemical composition, physical properties and mechanical properties of 9W18Cr4V material

Chemical Composition and Mechanical Properties of 9W18Cr4V Material

9W18 Cr4V material is a high performance tungsten-cobalt based alloy, which is widely used in the production of bonding wires, high-strength springs and precision ball bearings. It is known for its excellent wear resistance, dimensional stability and thermal stability.

Chemical Composition

The chemical composition of 9W18Cr4V is as follows:

• Carbon (C) 0.60% to 0.90%

• Silicon (Si) 0.25% to 0.50%

• Manganese (Mn) 0.25% to 0.50%

• Chromium (Cr) 17.00% to 19.00%

• Nickel (Ni) ≤ 0.50%

• Molybdenum (Mo) 0.30% to 0.50%

• Cobalt (Co) 5.00% to 6.00%

• Tungsten (W) 17.00% to 18.00%

• Vanadium (V) 3.00% to 4.00%

• Iron (Fe) Balance

• Oxygen (O) 0.15% to 0.45%

• Nitrogen (N) 0.01% to 0.03%

Physical Properties

The physical properties of 9W18Cr4V include:

• Density: 11.0 g/cm3

• Thermal Conductivity: 154 W/m-K at room temperature

• Thermal Expansion: 7.4 x 10-6 m/m-K @ 20-100°C

• Specific Heat: 430 J/kg-K at room temperature

• Electrical Resistivity: 22 μΩ-m

• Magnetic Permeability: 1.0006

Mechanical Properties

9W18Cr4V exhibits excellent mechanical properties, including:

• Ultimate Tensile Strength: 1200-1300 MPa

• Yield Strength: 850 MPa

• Elongation at Break: 15-20%

• Hardness: HRC 43-50

• Elastic Modulus: 187 GPa

• Fatigue Strength: 215 MPa

• Impact Strength: 20 J/cm2

Applications

9W18Cr4V is ideal for a variety of applications, including:

• Bonding wires

• High-strength springs

• Precision ball bearings

Conclusion

9W18Cr4V is an optimal grade of tungsten-cobalt based alloy, offering excellent wear resistance, dimensional stability and thermal stability. It also offers excellent mechanical properties, including high tensile strength, good elasticity and impact strength, as well as high fatigue strength. 9W18Cr4V is used for applications such as bonding wires, high-strength springs and precision ball bearings.

Chemical Composition and Physical and Mechanical Properties of W9W18Cr4V

W9W18Cr4V is a high-end alloy steel used in the manufacturing of turbine blades, as well as parts of the shafts, bolts, and valves in the high-temperature environment of machines. This high-strength, high-hardness material is composed of C (carbon) 0.9-1.1 %, Si (silicon) 0.15-0.25%, Mn (manganese) 0.5-1.5%, P (phosphorus) <0.03%, S (sulfur) <0.03%, Cr (chromium) 18-19%, Mo (molybdenum) 2-3%, V (vanadium) 0.3-1.4%, W (tungsten) 9-11%.

The physical properties of W9W18Cr4V steel include the Density, which is 7.7-7.9 g/cm3, Melting Point, which ranges from 1420-1460℃, Young’s Modulus, which is 190-210 GPa and Coefficient of Thermal Expansion, which is 7-10 μm/mC.

As far as the mechanical properties, W9W18Cr4V steel shows excellent yield strength, which is greater than 700MPa, ultimate tensile strength, which is greater than 1100MPa, and elongation, which is higher than 25%. Combined with a good combination of toughness and high fatigue strength it performance a remarkable performance in high-temperature environment, making it quite suitable for the manufacturing of turbine blades, as well as their other parts in machines.

W9W18Cr4V steel is highly wear resistant due to its high hardness levels and its extremely high resistance to hot cracking when exposed to high temperature. Its excellent for abrasion and corrosion resistance high tempering resistance, ensures its high strength and long operational life. In conclusion, W9W18Cr4V steel has excellent physical and mechanical properties and can, therefore, be used for applications where high strength and excellent wear resistance are required.