Description

Stainless Steel Round Bar 440C is a high carbon martensitic stainless steel. It has high strength, moderate corrosion resistance, and good hardness and wear resistance. It can be heat treated to obtain a wide range of mechanical properties.

Applications

Stainless Steel Round Bar 440C is commonly used in applications such as ball bearings, valve parts, knives, and surgical instruments.

Chemical Composition

The chemical composition of Stainless Steel Round Bar 440C is as follows:

• Carbon: 0.95-1.20%
• Chromium: 16.00-18.00%
• Manganese: 1.00% Max
• Phosphorus: 0.04% Max
• Sulfur: 0.03% Max
• Silicon: 1.00% Max

Mechanical Properties

The mechanical properties of Stainless Steel Round Bar 440C are as follows:

• Tensile Strength: 275 ksi (1900 MPa)
• Yield Strength: 275 ksi (1900 MPa)
• Elongation: 14%
• Hardness: HRC 58-60

Heat Treatment

Stainless Steel Round Bar 440C can be heat treated to achieve different mechanical properties. The following are the typical heat treatment processes:

• Annealing: Heat to 800-850°C, hold for 2-4 hours, then air cool.
• Quenching: Heat to 1010-1065°C, then quench in air or oil.
• Tempering: Heat to 150-370°C, hold for 1-4 hours, then air cool.

Conclusion

Stainless Steel Round Bar 440C is a versatile material that offers high strength, good corrosion resistance, and excellent wear resistance. It is commonly used in various applications such as ball bearings, valve parts, knives, and surgical instruments. Proper heat treatment can significantly improve its mechanical properties.