18Cr2Ni4WA alloy steel plate refers to a type of steel plate made of 18Cr2Ni4WA alloy steel, which has excellent comprehensive properties and is widely used in various high-end manufacturing fields. The following is a detailed introduction:

Chemical Composition

Carbon (C)：0.13-0.19%, which balances strength and plasticity and avoids high carbon brittleness.

Silicon (Si)：0.17-0.37%, which helps to optimize deoxidation and hot workability.

Manganese (Mn)：0.30-0.60%, which also contributes to optimizing deoxidation and hot workability.

Sulfur (S)：≤0.025%, and limiting the content of sulfur can ensure the purity of the material and its resistance to hydrogen embrittlement.

Phosphorus (P)：≤0.025%, similar to sulfur, controlling the phosphorus content is also to ensure the quality of the material.

Chromium (Cr)：1.35-1.65%, which can improve the hardenability, toughness and corrosion resistance of steel.

Nickel (Ni)：4.00-4.50%, which can significantly improve the low-temperature impact toughness of steel and work together with chromium to enhance the hardenability and corrosion resistance of steel.

Copper (Cu)：≤0.025%, controlling the copper content can avoid some negative effects on the material properties.

Tungsten (W)：0.80-1.20%, which can refine the grains and enhance the high-temperature creep resistance of steel.

 

 

 

 

 

 

Mechanical Properties

High Strength：The tensile strength is ≥1180 MPa, and the yield strength is ≥835 MPa (in some processes, it can reach more than 1029 MPa), which can withstand heavy loads and impacts2.

Good Plasticity and Toughness：The elongation is ≥10%, the percentage reduction of area is ≥45%, the impact energy is ≥78 J, and the fracture toughness is excellent, indicating that the steel plate has good deformation ability and impact resistance2.

Hardness Gradient：In the delivery state, the hardness is ≤269 HB, which is convenient for cutting and processing. After carburizing, the surface hardness can reach HRC58-63, and the core hardness remains at HRC35-45, realizing a "hard shell and soft core" structure, which is beneficial to improving the wear resistance and service life of the material2.

 

 

 

 

 

 

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