4130 forged steel and 4330 forged steel alloy steel are components, but although their alloy compositions are both low-alloy steels commonly used in high-strength and high toughness mechanical parts, there are some significant differences in their alloy compositions and properties.
1. Differences in chemical composition
4330 forged steel contains a higher amount of molybdenum (Mo), which gives it better wear resistance, fatigue resistance, and high temperature resistance. The addition of molybdenum improves the hardness and impact resistance of the material, making it particularly suitable for high load and high impact working conditions.
Therefore, the molybdenum content of 4130 forged steel is relatively low, and its performance is not as strong as 4330 steel under certain extreme conditions, but it still has sufficient performance in medium strength applications.
2. Differences in strength and performance
4130 forged steel:
Tensile strength: approximately 850-1000 MPa.
Yield strength: approximately 450-650 MPa.
Hardness: usually 28-34 HRC (after heat treatment).
Suitable for medium load, low temperature, and high load applications, commonly used in aviation, racing frames, and pressure containment.
4330 forged steel:
Tensile strength: can reach 1030-1380 MPa.
Yield strength: approximately 860-1170 MPa.
Hardness: usually 30-45 HRC (after heat treatment).
More suitable for environments with high strength, fatigue resistance, and high impact, such as oil drilling tools, landing gear components, etc.
3. Differences in usage scenarios
l 4130 forged steel:
Due to its low molybdenum content and moderate strength, it is suitable for applications with moderate loads and impacts, such as racing frames, structural components, aircraft parts, etc. It is usually used in situations that require good discomfort and appropriate strength.
l 4330 forged steel:
Containing more molybdenum, it is more suitable for applications under high fatigue and extreme conditions, such as petroleum equipment, landing gear components, heavy machinery, and military equipment. It has stronger fatigue resistance, wear resistance, and impact toughness, especially when it needs to withstand larger strains and high environmental impacts.
Post time: Apr-18-2025
