Mechanical Properties 4140 Steel And 42crmo Heat Treatment Process - China

Mechanical Properties

Due to the different production process and processing methods of each steel factory, the data of mechanical properties will also be different.

The data in the table is the common mechanical performance index and approximate range of our Songshun Steel.

It can be seen from the data that the strength of 42CrMo is better than that of 4140, but the plasticity of 4140 is better than that of 42CrMo.

Heat Treatment Process

The heat treatment states of 4140 and 42CrMo are both quenched and tempered, but due to the slight differences in chemical composition and mechanical properties between the two, there are also differences in their heat treatment processes.

(1) Quenching

The quenching temperature of 4140 steel is 840°C, the quenching temperature of 42CrMo steel is 850°C, and the medium is oil or water, but the quenching hardness of 42CrMo steel is higher than that of 4140 steel.

(2) Tempering

After quenching, quickly put it into the medium to cool, and then perform tempering treatment, the purpose is to reduce the brittleness of the steel and provide toughness.

4140 needs to be kept at a tempering temperature of 540°C for a period of time, while the tempering temperature of 42CrMo is 560°C.

42CrMo steel already has good toughness at high temperature, and depending on the requirements, there may be cases where the second tempering treatment is not required.

(3) Normalizing

In terms of normalizing, 4140 steel needs to be kept at 850-880°C for a period of time, and then rapidly cooled to room temperature.

The structure after normalizing is pearlite and a small amount of cementite.

The normalizing temperature of 42CrMo steel will be higher than that of 4140, at 860-890°C.

Songshun Steel

Dongguan Songshun Mould Steel Co., LTD which is an industrial and trading company with 3500-7000ts hydraulic forging machine.

We provide a great variety of steels, competitive price with good quality and keep the large stock are over 20000 tons.

Company Contact:

• Posted By: Dongguan Songshun Mould Steel Co., Ltd.

• Phone: 076985475596

• Address: 1st Floor, No. 1, Dongda Fourth Street, Shatou Community, Chang'an Town, Dongguan , Guangdong , China

• Email:

• Website: https://songshunsteel.com/

• Business Description: Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc.
  
  After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter.
  
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  Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on.
  
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