In the field of high-strength alloy structural steels for industrial manufacturing, 4140 and 4142 steels are like twin brothers. Both belong to the Cr-Mo alloy structural steel family, and their excellent hardenability and toughness make them a popular choice for mechanical parts, molds, and shafts. However, they are not completely identical—a subtle difference in [...]
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 [...]
4340 steel is a high-strength, high-toughness nickel-chromium-molybdenum alloy structural steel, belonging to the category of ultra-high-strength steel. Its excellent comprehensive performance (especially in the quenched and tempered state) makes it widely used in key fields such as aviation, defense, and energy. The following is a systematic analysis of the performance of 4340 steel by [...]
The low temperature toughness of 4340 steel is significantly better than that of 4140 steel. Here is a detailed comparison and reason analysis: 1. Key Difference: Nickel Content 4140 steel: It is a medium carbon chromium-molybdenum steel. Its standard composition does not contain nickel, or the nickel content is very low (usually present as [...]
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 [...]
H13 steel (US grade, corresponding to European grade 1.2344) is a widely used hot working die steel. Due to its excellent high temperature performance, wear resistance and thermal fatigue resistance, it is widely used in high temperature and high pressure industrial scenarios. The following is a detailed analysis of its industrial applications and performance: [...]
M2 high-speed steel (such as AISI M2 in the United States or W6Mo5Cr4V2 in China) is a high-carbon, high-alloy tool steel known for its excellent red hardness (ability to maintain hardness at high temperatures) and wear resistance. Its hardness mainly depends on the heat treatment process. The following are detailed data and analysis: 1. [...]
In the field of mechanical manufacturing, carburizing steel is the core material of high-load parts such as gears, bearings, and transmission shafts. Among the many carburizing steel grades, 8620 steel (SAE/AISI 8620) is known as the "king of carburizing steel" for its excellent balance of comprehensive performance. Behind this title is its unique advantages [...]
H13 ultra-fine processing refers to a material optimization technology that uses a special process to refine the grains of H13 hot working die steel to significantly improve its comprehensive performance. The following is a detailed analysis: 1. Basic Characteristics of H13 Steel H13 is a commonly used hot working die steel, widely used in [...]
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, [...]
As the global installed capacity of wind power exceeds the 1 TW mark, the large-scale development of wind turbines and the rapid development of offshore wind power have put forward more stringent requirements on core components. Bearings, as the "joints" of wind turbines, need to operate stably for more than 20 years under extreme [...]
In the modern industrial field, 4340 steel is widely used in high-end manufacturing industries such as aerospace, national defense, and heavy machinery due to its excellent comprehensive mechanical properties. However, with the rapid development of industrial technology, the performance requirements for 4340 steel have become increasingly stringent. As a key process to tap the [...]
42CrMo4 steel (corresponding to national standard 42CrMo, American standard 4140) is a medium-carbon alloy structural steel. Due to its high strength, excellent hardenability and good fatigue performance, it is widely used in high-stress working conditions such as heavy-duty gears, transmission shafts, and oil drilling tools. However, its performance is highly dependent on the precise [...]
On the grand stage of the machinery industry, many key roles are silently playing an irreplaceable role, and 51CrV4 spring steel is one of them. From the precise operation of automobile engines to the powerful drive of construction machinery, it does not often appear in the public eye, but with its unique performance, it [...]