Introduction
AISI 4140/AISI 4140 Steel Grade is a chromium-molybdenum alloy steel, the chromium content provides good hardness penetration, and the molybdenum content ensures uniform hardness and high strength. This grade generally exhibits good weldability, machinability, relatively mild tempering and quenching hardening characteristics and also has excellent toughness and ductility with some heat treatable benefits.
AISI/SAE 4140 is one of the most commonly used medium carbon alloy grade. AISI 4140 grade is used to manufacture a wide variety of components and parts in many industries. Alloy 4140 has high strength, good fatigue strength, excellent toughness and good ductility which makes it suitable for the production of heavy-duty parts.
What is AISI 4140/AISI 4140 Steel Grade
AISI 4140/AISI 4140 Steel Grade is a medium carbon alloy steel containing chromium and molybdenum for enhanced strength and wear resistance. This alloy grade also has excellent ductility, toughness and machinability. AISI/SAE 4140 alloy grade is a versatile and popular alloy used in the production of a wide variety of products, including oil-free gears, shafts, axles, cams, and pistons. The chromium content in AISI 4140 steel grade imparts moderate wear resistance and good hardness. The molybdenum precipitation strengthens and improves the corrosion resistance as well as hardenability of this alloy grade.
Applications and Properties
AISI 4140 steel grade is a versatile and popular alloy used in many industrial and engineering applications. It exhibits good corrosion resistance, wear resistance and toughness. The machinability and weldability of AISI 4140 steel grade are favorable. It is often used for large parts that require high strength and impact resistance. Common applications for AISI 4140 include oil-free gears, shafts, axles, cams, and pistons.
AISI 4140 is a medium carbon alloy grade which is widely used in the production of parts and components requiring strength and toughness. It has good weldability, machinability, good wear resistance and excellent fatigue strength. This alloy grade is suitable for the production of components in oil and gas, petrochemical, renewable energy, and automotive industries.
Heat Treatment of AISI/SAE 4140 Steel
Heat treatment of AISI/SAE 4140 steel grade involves heating it at 820°C (1508°F) followed by quenching in water and tempering. Tempering temperatures range from 205°C (400°F) to 649°C (1200°F). In general, the higher the tempering temperature, the greater the strength and hardness of the 4140 steel. The 4140 steel grade can be hardened by quenching. It has excellent wear resistance and temperature resistance properties.
Conclusion
In conclusion, AISI 4140/AISI 4140 Steel Grade is a versatile and popular alloy grade with good hardening, wear resistance, toughness, and machinability. This alloy grade is commonly used in the manufacturing of components and parts, such as oil-free gears, shafts, axles, cams, and pistons. It can be heat-treated and strengthened by tempering and quenching hardening processes. AISI 4140 steel grade is suitable for the production of components in oil and gas, petrochemical, renewable energy, and automotive industries.
