13CrMo4-4 Steel Grade: A Reliable Choice for Power Plant Equipment

Specification 13CrMo4-4 Steel Grade: A Reliable Choice for Power Plant Equipment

The 13CrMo4-4 steel grade is widely recognized as a reliable choice for power plant equipment due to its exceptional mechanical properties and chemical composition. It is a low-alloy steel ideal for high-temperature applications, making it suitable for components such as boilers, steam generators, and turbine parts.

Mechanical Properties:
– Tensile Strength: The 13CrMo4-4 steel grade exhibits a minimum tensile strength of 440-590 MPa. This high tensile strength ensures the material can withstand the high stresses and pressures present in power plant operations.
– Yield Strength: It has a minimum yield strength of 275-355 MPa. This indicates the maximum stress the material can handle before it starts to deform permanently.
– Elongation: The elongation at break for 13CrMo4-4 steel is a minimum of 22%. This property allows the material to undergo deformation without fracturing, making it ideal for power plant equipment that may experience thermal expansion or contraction.

Chemical Composition:
– Carbon (C): The carbon content in 13CrMo4-4 steel is limited to a maximum of 0.15%. The low carbon content ensures good weldability and reduced susceptibility to embrittlement.
– Silicon (Si): Silicon is present in the steel composition at a maximum of 0.50%. It improves the material’s strength and resistance to oxidation at high temperatures.
– Manganese (Mn): The manganese content is limited to a maximum of 0.80%. It enhances the steel’s strength and hardness, improving its performance in power plant applications.
– Phosphorus (P) and Sulfur (S): These elements are present in limited amounts (P ≤ 0.025%, S ≤ 0.010%) to maintain the steel’s cleanliness and prevent impurities that could negatively affect its properties.
– Chromium (Cr): Chromium is the key alloying element in 13CrMo4-4 steel, with a content of 0.70-1.15%. It provides excellent corrosion resistance, oxidation resistance, and high-temperature strength, making it suitable for power plant environments.

Overall, the 13CrMo4-4 steel grade’s combination of mechanical properties and chemical composition makes it a reliable choice for power plant equipment. Its high tensile strength, yield strength, and elongation ensure its ability to withstand the demanding conditions of power plant operations. Additionally, the steel’s low carbon content, along with controlled amounts of other alloying elements, maintains its weldability and resistance to embrittlement.
13CrMo4 4 Steel grade
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