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The Basic Information You Need To Know About 42CrMo4 Steel

Recently, a customer needs to find high-strength, tough and wear-resistant steel. 42CrMo4 material will be one of the best choices. What is 42CrMo4 steel? It is an alloy structural steel with excellent performance and is an ideal material for manufacturing various mechanical parts, shafts, and tools. And it is in great demand and plays an indispensable role in the steel market. This article will explore the chemical composition, performance, surface, processing, heat treatment, application range, etc. of 42CrMo4 steel provided by Songshun, providing a useful reference for your needs or engineering applications.

DIN/ISO 42CrMo4 Steel Equivalent

Internationally, the nomenclature and corresponding standards of 42CrMo4 steel vary in each country, but the similarity is extremely high. It can be said that it is equivalent to this steel. If it meets your needs, it can be used interchangeably.

42CrMo4 Steel Equivalent
42CrMoA304224140G41400SCM440SCM440 / SCM440H42CrMo41.722542CD4708M4042CrMo4

42CrMo4 Steel Chemical Composition

ISO 42CrMo4 Steel Chemical Composition

Normally, the chemical composition of 42CrMo4 steel is shown in the above chart. Understanding its detailed chemical composition is crucial to its mechanical properties and durability. Its high manganese and carbon content can improve the hardness, strength and toughness of 42CrMo4; then the addition of chromium and molybdenum can improve the steel’s wear resistance, hardenability and corrosion resistance; these elements work together to make 42CrMo4 steel have better comprehensive properties. At Songshun, if you need one or some elements of 42CrMo4 alloy steel to reach a different content, our engineers can customize it for you. For example, if you need a lower silicon content, in this case, we will use other deoxidation methods to meet your needs.

42CrMo4 Steel Performance Characteristics

  • High strength and high toughness
  • Excellent hardenability and thermal stability
  • Excellent fatigue resistance
  • High hardness and wear resistance
  • Good corrosion resistance, oxidation resistance and weldability
  • Easy to process and cut, can be electroplated

These characteristics vary depending on the parameters used in the heat treatment process. You tell us your special technical requirements, and Songshun’s engineers will evaluate them and send you a professional quotation.

Manufacturing And Processing 42CrMo4 Steel

At Songshun, you can clearly understand the manufacturing process of our high-quality 42CrMo4 steel, ensuring that you can get first-class quality every time.

42CrMo4 Steel Forging

Generally, DIN 42CrMo4 alloy steel is directly forged from ingots or forged from continuous casting billets; depending on the requirements, we use different methods and forging ratios. The appropriate forging ratio, temperature and number of times can effectively refine the grains and improve the mechanical properties and uniformity of the steel.

42CrMo4 Steel Heat Treatment

42CrMo4 steel generally adopts quenching and tempering or annealing heat treatment process. The specific heat treatment process should be selected according to the use requirements of the product and the characteristics of the material. Usually the quenching temperature of 42CrMo4 is generally between 830-860℃, oil cooling, water or salt bath cooling; tempering control is adjusted between 100-700℃, and the specific temperature needs to be adjusted according to the required hardness. After tempering, the toughness and fatigue strength of the steel can be improved; the annealing temperature is 760±10℃, the softening annealing temperature is 680~700°C, and the furnace is slowly cooled. Through the appropriate heat treatment process, 42CrMo4 steel obtains excellent mechanical properties.

Processing and Surface Treatment

Songshun can provide various processing and surface treatment services for various 42CrMo4 steels, including surface quenching, polishing, carburizing, cutting, fire cutting, nitriding, biting, electroplating, passivation, drilling, etc.

ISO 42CrMo4 Steel Application Areas

In Songshun, this steel is usually purchased in large quantities by customers in the fields of machinery manufacturing, automobile industry, petrochemical industry, mold manufacturing, aerospace, marine engineering, etc. to apply to their projects. 42CrMo4 steel is usually used to manufacture forgings, machine tools, shafts, gears, oil deep well drill pipe joints, hull structures, engine parts, molds and tools, etc.

From the above basic information about 42CrMo4 steel, it is an important high-quality industrial material with excellent performance and is widely used in many fields. And knowing this information is also crucial for you to choose the right material and achieve the expected performance. At Songshun, we have a complete manufacturing and processing process for 42CrMo4 alloy steel. Through reasonable chemical composition design, manufacturing and heat treatment processes, we can improve the performance and quality of steel to meet the requirements of different customers and fields.


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