34CrNiMo6 is a steel alloy that is specified under DIN 17200, a German standard for heat-treatable steels. This standard outlines the chemical composition, mechanical properties, and heat treatment requirements for this alloy.

Chemical Composition of 34CrNiMo6 According to DIN

The chemical composition of 34CrNiMo6, as per the DIN specification, can be summarized as follows:

• Carbon (C): Carbon content typically falls in the range of 0.30% to 0.38%, contributing to the alloy’s hardness and strength.
• Chromium (Cr): Chromium content ranges from 1.30% to 1.70%, providing corrosion resistance and hardenability.
• Nickel (Ni): Nickel content ranges from 1.30% to 1.70%, enhancing toughness, impact strength, and fatigue resistance.
• Molybdenum (Mo): Molybdenum content is typically between 0.15% and 0.25%, contributing to hardenability and high-temperature strength.
• Silicon (Si): Silicon content falls within the range of 0.15% to 0.35%, contributing to strength and heat resistance.
• Manganese (Mn): Manganese content ranges from 0.50% to 0.80%, aiding in deoxidation and improving strength.

Mechanical Properties According to DIN

According to the DIN standard, 34CrNiMo6 exhibits the following mechanical properties after heat treatment:

• Tensile Strength: The tensile strength of 34CrNiMo6 typically ranges from 800 MPa to 1100 MPa, depending on the heat treatment and tempering process.
• Yield Strength: The yield strength is around 670 MPa to 900 MPa, depending on the heat treatment condition.
• Elongation: 34CrNiMo6 exhibits an elongation of about 12% to 15%, providing good ductility.
• Impact Toughness: The alloy demonstrates excellent impact toughness, making it suitable for applications where resistance to sudden loads is essential.

Heat Treatment Requirements

To achieve the desired mechanical properties, 34CrNiMo6 must undergo specific heat treatment processes, including quenching and tempering. The DIN standard provides guidelines for the appropriate heat treatment conditions.

Heading 5: Applications of 34CrNiMo6

34CrNiMo6, as specified by DIN 17200, is used in various applications due to its high strength and toughness. Some common uses include:

• Manufacturing of gears, shafts, and other components in the automotive industry.
• Aerospace applications, such as aircraft landing gear components.
• Construction of heavy machinery and equipment.
• Oil and gas industry for drilling equipment and pipeline components.

34CrNiMo6, as defined by the DIN specification, is a versatile and widely used steel alloy with specific chemical composition and mechanical properties. It finds applications in industries where high strength, toughness, and resistance to wear and corrosion are essential.