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SAE4140 SAE4130 SAE4340 Alloy Hot Rolled Round Steel Bar
SAE4140 alloy steel round bar has excellent hardenability and hardness penetration, with its chromium content providing good hardness and molybdenum enhancing hardness stability and consistency. This material responds well to heat treatment and is simple to machine in the cold drawn annealed condition.
SAE4130 Round Steel Bar
SAE4130 is a low alloy steel material containing a high percentage of chromium and molybdenum for good strength and toughness.
It is commonly used in the manufacture of parts and components with high strength requirements, such as mechanical parts, engine fittings, guide rails, etc. in the aerospace industry.
SAE4340 round steel is alloy structural steel material, belonging to the American standard ASTM A29 grade, corresponding to 40CrNi2Mo in Chinese national standard GB/T 3077-2015.
Its main components include carbon, silicon, manganese, nickel, molybdenum, etc., of which the carbon content is about 0.38%, the nickel content is between 1.65% and 2.00%, and the addition of molybdenum enhances the toughness and corrosion resistance of the steel.
SAE4340 round steel has a wide range of applications in machinery manufacturing, automobile manufacturing, oil extraction and other fields, especially in the manufacture of drive shafts, gears, bearings and other key components with excellent performance.
Application areas and processing characteristics
These materials perform well in the heat treatment process, and after appropriate annealing, quenching and tempering treatment, they can obtain ideal hardness, plasticity and toughness to meet the needs of use under different working conditions.
During machining, the heat treatment state of the material needs to be taken into account to ensure the quality of the machining and the smoothness of the subsequent assembly.
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