8620 steel equivalent and its properties

AISI 8620 steel is an alloyed low carbon steel. It is most often used in the mechanical industry. Its mechanical properties mean it can be used in the production of various parts, such as bearings, gears and many other elements. This steel has good strength properties and at the same time remains optimally plastic during processing. 8620 steel equivalent to 20NICRMO2-2. They have similar chemical and mechanical properties. Here are some important information about this AISI 8620 equivalent.

• 20NiCrMo2-2 as 8620 steel equivalent—basic information
• Important information regarding the mechanical properties of 20NiCrMo2-2 steel, i.e. AISI 8620 steel
• Processes related to heat treatment of the discussed alloy steel and its equivalents

20NiCrMo2-2 as 8620 steel equivalent—basic information

20NiCrMo2-2 is a low-carbon alloy steel that has the addition of nickel, chromium, and molybdenum. These ingredients increase the mechanical properties of steel. It is very often used as low alloy nickel steel for the production of durable components. They must be resistant to heavy loads and pressure, resistant to deformation, crumbling, damage and cracks. 

This 8620 steel equivalent is most often used in the production of components and parts generally supplied to motor vehicles, agricultural vehicles and industrial machines.

This molybdenum case hardening steel is subjected to heat treatment. Thanks to this, it is delivered to the customer in the form of rolled or forged bars. It can also be formed into rings, wires, and forgings. Moreover, 20NiCrMo2-2 is flexible during hardening.

Important information regarding the mechanical properties of 20NiCrMo2-2 steel, i.e. AISI 8620 steel

Heat treatment of this steel makes it very resistant to tensile strength. It is also typical for steel in that it is characterised by very good hardenability. This further improves its mechanical properties.

This steel is recognised by core strength, high resistance to cracking, and also to the loads to which it is subjected cyclically.

Abrasion resistance should also be mentioned. This is a feature that allows the use of this steel in the production of parts that are heavily used, durable and resistant to rapid wear.

Processes related to heat treatment of the discussed alloy steel and its equivalents

The steel in question can be subjected to many heat treatment processes. One of them is hardening. It involves reaching a high temperature in the steel and then cooling it quickly, which improves the hardness of the steel. The first hardening can be done in water or oil after reaching a temperature of 860–900 degrees Celsius.

The second hardening is performed only after carburising. It is carried out after reaching a temperature of 810–830 degrees Celsius.

The next process is annealing. It can be performed three times. The first annealing takes place at a temperature of 860–900 degrees Celsius. This is normalizing annealing. The second softening annealing requires a temperature of 650–700 degrees Celsius. The third annealing is performed only after carburizing. The temperature to be achieved is 660-680 degrees Celsius.

Tempering should also be discussed. It takes place at a temperature of 150–200 degrees Celsius. This is a process that allows steel to be heated in a controlled manner. In this way, the steel becomes more flexible, but also durable. This is a process that takes into account the mechanical properties of steel.

The last two processes are carbonitriding at a temperature of 860-930 degrees and carburizing at a temperature of 880–950 degrees.