ASTM4140 standard and supply application

Hit：122026-01-15 10:51:47　

ASTM4140 standard and supply application
The main alloying elements of 4140 steel include chromium (0.8% -1.1%), molybdenum (0.15% -0.25%), and manganese (0.75% -1.0%), with a carbon content control range of 0.33% -0.48% and a silicon content not exceeding 0.40%. This material is strictly produced in accordance with the ASTM A29/A29M-04 standard, forming a complete correspondence with the 42CrMo in the domestic GB/T 3077 standard and the DIN standard 42CrMo4. The element ratio of the three is highly consistent with the mechanical performance indicators. 4140 steel is a low-alloy structural steel that complies with the ASTM A29/A29M-04 standard, classified as a medium hardenability steel grade with a carbon content of 0.33% -0.48%, corresponding to the domestic grades 42CrMo and 42CrMo4 [1-2]. After quenching and tempering heat treatment, this material has high strength (tensile strength ≥ 1080 megapascals), excellent comprehensive mechanical properties, and fatigue resistance. The quenching deformation rate is low and it still maintains excellent creep strength at high temperatures [1]. Widely used in the fields of automotive parts, mold manufacturing, and precision mechanical component processing, with high yield. This steel is used in the automotive manufacturing industry to produce high load transmission components such as gearbox gears and connecting rods, utilizing its high yield characteristics to reduce processing losses. In the mold industry, it is suitable for the manufacturing of injection mold frames, die-casting mold cores and other components, and achieves machining characteristics through pre hardening treatment. In the field of energy equipment, it is selected as the substrate for key components such as turbine fasteners and salvage tools, fully utilizing the material's creep resistance performance.