18cr2ni4wA

18Cr2Ni4WA is a high-strength medium-alloy carburizing steel. To prevent excessive carbonitride and austenite content, it can be carburized at 900~920℃ after carburization, tempered at 600~650℃, undergo cryogenic treatment, and oil quenched, achieving a hardness of around 48. To reach HRC 58-63, surface carburization is mandatory.
18Cr2Ni4WA steel is a commonly used alloy carburizing steel with high strength and toughness, good hardenability, and can also be used in non-carburizing and quenching conditions. It is generally used for important components with large cross-sections, high loads, good toughness, and low notch sensitivity.
   

Material Name: Alloy Structural Steel

Grade: 18Cr2Ni4WA

Standard: GB/T 3077-1988

18Cr2Ni4WA is a high-strength medium-alloy carbon steel. To prevent the carbonitride and austenite content from exceeding the limit, post-carburizing high-temperature tempering at 900~920°C, followed by tempering at 600~650°C, deep cryogenic treatment, and oil quenching will result in a hardness of around 48. To achieve HRC58-63, surface carburizing is necessary.

18Cr2Ni4WA steel is a commonly used alloy carburizing steel with high strength and toughness, good hardenability, and can also be used for quenching and tempering without carburization. It is generally used for critical components with large cross-sections, high loads, good toughness, and low notch sensitivity.

Chemical Composition

Carbon (C): 0.13~0.19

Silicon (Si): 0.17~0.37

Manganese (Mn): 0.30～0.60

Sulfur (S): Permitted residual content ≤ 0.025%

Phosphorus (P): Allowable residual content ≤ 0.025

Chromium (Cr): 1.35～1.65

Nickel (Ni): 4.00~4.50

Copper (Cu): Allowable residual content ≤ 0.025

Tungsten (W): 0.80～1.20