As an engineer, you may have observed differences in the behavior of carbon steel springs, a prevalent component in numerous devices. These differences are predominantly due to the type of carbon steel used in the manufacturing process. This article will dive into a closer examination of three carbon steel types often implemented in spring production: Music Wire, Hard Drawn ASTM A227, and Oil Tempered ASTM A229. By zeroing in on these materials, we'll underline how their distinct properties can alter a spring's function, whether deployed in a car's suspension system or a home appliance.

Carbon Steel as a Spring Material

Carbon steel is frequently used in spring design due to its mechanical strength. The hardness of carbon steel is essential for springs deployed in automotive suspension systems. These springs undergo regular compression and expansion, and carbon steel's hardness helps these springs withstand this stress without premature wear. In addition, carbon steel can retain its properties at high temperatures. This property is evident in industrial furnace cases where carbon steel springs maintain their function at high operating temperatures.

Carbon steel features high durability, which is advantageous for spring design. An example of this is the valve spring in a racing engine, which goes through rapid opening and closing cycles. When made of carbon steel, these springs can resist wear, leading to a longer lifespan. Additionally, carbon steel has a decent yield strength, the ability to revert to its original shape after stretching. This trait is observable in cases with recurring mechanical stress, like the spring in a mechanical watch.

Relative Advantages of Music Wire over other Carbon Steels

Relative Advantages of Hard Drawn ASTM A227 over other Carbon Steels

Relative Advantages of Oil Tempered ASTM A229 over other Carbon Steels

In spring design, material selection is relevant. Oil Tempered ASTM A229 provides specific attributes which may give it an edge over other carbon steel types.


The selection of carbon steel material can affect the function, durability, and performance of your spring design. Let's review three types: Music Wire, Hard Drawn ASTM A227, and Oil Tempered ASTM A229. Each has unique features more appropriate for particular applications. For example, Music Wire is chosen for applications requiring high tensile strength, while Hard Drawn ASTM A227, which is cost-effective, is more suitable for lower demand applications. Oil Tempered ASTM A229 is known for its strong toughness and fatigue properties, making it ideal for high-stress applications. Determining the specific requirements of your project can assist you in selecting the right material and maximizing your spring's lifespan and effectiveness.