AISI 4140 low-alloy chromium-molybdenum steel is widely used in the oil and gas, aviation, and heavy equipment industries for its excellent hardenability and comprehensive mechanical properties. Through quenching and tempering (quenching followed by high-temperature tempering), it can be developed into a multi-grade strength system, with the 80 ksi (550 MPa) and 110 ksi (758 [...]
In the field of mechanical manufacturing, material properties often determine the quality and service life of products, and hardenability, as a key indicator to measure the heat treatment performance of steel, directly affects the comprehensive mechanical properties of parts. 4140 steel, as a widely used medium-carbon alloy structural steel, has a medium to high [...]
4140 steel (domestic grade 42CrMo) is an excellent medium carbon alloy structural steel, known for its high strength, good toughness, wear resistance and hardenability. There is a close relationship between its strength and hardness, but the selection needs to be weighed according to the specific application requirements. Core Principles: Strength and hardness can usually [...]
The mechanical properties of chromium-molybdenum steels (4130 and 4140) are highly dependent on the heat treatment process. By controlling the heating, cooling and tempering processes, engineers can achieve a precise balance between hardness and toughness. This article will reveal the influence of heat treatment on the properties of these two steels through experimental data, [...]
We all know that as a high-strength low-alloy structural steel, 4140 steel has very good comprehensive properties, high hardness, high hardness, as well as good toughness and plasticity. In practical applications, for 4140 steel, is the higher the hardness and strength, the better? Obviously not, with high hardness, 4140 also becomes brittle and more [...]