Carbon Steel
Carbon steel is one of the most widely used materials for automotive springs. It's inexpensive, easy to process, and highly elastic. Under normal conditions, its tensile strength and yield strength are similar, making it an excellent manufacturing material. Furthermore, within the specified operating range, its creep and fatigue properties are also excellent.
However, carbon steel also has disadvantages, primarily its poor corrosion resistance and its tendency to rust in humid environments.
Alloy Steel
Alloy steel is steel containing a certain number of alloying elements and is widely used in automotive spring manufacturing. While maintaining good ductility and toughness, alloy steel exhibits higher tensile strength and yield strength. By adding and mixing different alloying elements, alloy steels with varying properties can be created, expanding its application.
Compared to carbon steel, alloy steel offers improved wear resistance, corrosion resistance, fatigue performance, and high-temperature stability, but it also has the disadvantage of higher cost.
Stainless Steel
Stainless steel is a steel alloy with excellent corrosion resistance and is also commonly used in automotive springs. Compared to carbon steel and alloy steel, stainless steel offers greater corrosion resistance and aesthetics, but it also comes at a higher cost.
Stainless steel comes in many varieties, with AISI 302, 304, 316, 321, and 17-7PH being the most commonly used. AISI 302 and 304 are common stainless steel materials, but they can become brittle at high temperatures or in highly corrosive environments. 316 and 321, on the other hand, offer greater corrosion resistance and are suitable for more demanding environments.
Other Materials
In addition to the three common materials mentioned above, nickel alloys can also be used to manufacture automotive springs. Nickel alloy springs offer high corrosion resistance and high-temperature stability, but they also come at a significant cost.
