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AISI 4140 equivalent material

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SAE 4140 is a chromium-molybdenum alloy steel. Composition of key elements are Carbon (0.38-0.43%), Manganese (0.75-1.00%), Chromium (0.80-1.10%), Molybdenum (0.15-0.25%), Silicon (0.15-0.30%), Sulfur & Phosphorus.

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1. Size for size a fine thread is stronger than a coarse thread . This is both in tension (because of the larger stress area) and shear (because of their larger minor diameter).

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4041 steelproperties

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Known for its versatility, SAE 4140 steel is a type of chromium-molybdenum alloy steel. These key elements (chromium and molybdenum) enhance its properties, allowing for heat treatment to achieve a wide range of strengths. This makes SAE 4140 a popular choice for various applications, particularly in machine parts like gears, shafts, and spindles.

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SAE 4140 steel boasts a well-rounded combination of mechanical properties, making it a popular choice for demanding applications. It offers good tensile strength and yield strength, allowing it to handle significant loads. Additionally, SAE 4140 exhibits good toughness and wear resistance, making it suitable for parts that experience impact or friction. While not its most defining feature, it also possesses some level of machinability, aiding in the manufacturing process.

Normally a coarse thread is specified unless there is an over-riding reason to specify a fine thread, certainly for metric fasteners, fine threads are more difficult to obtain.

SAE 4140 is a versatile and widely used alloy steel known for its impressive balance of strength and toughness. It offers good performance at high temperatures and resists wear. This makes it ideal for demanding applications like gears, shafts, and critical components in power plants and refineries. Its ability to be heat treated for various strength levels and its good weldability make it a popular choice for projects requiring durability and reliability.

Finding a direct material equivalent to SAE 4140 depends on the specific application and desired properties. AISI 4130 Chromoly Steel and EN 1.7225 (Europe)