The Secret Behind the Hot Forging Performance of S35C Steel Plate

S35C steel plate, a medium carbon steel under the JIS G 4051 standard, is widely favored for its excellent hot forging properties. But what makes this material perform so well under high temperatures and pressure?

The secret lies in its balanced chemical composition—mainly around 0.35% carbon with moderate levels of manganese and low impurity content. This composition allows the steel to maintain plasticity at elevated temperatures, making it easier to deform without cracking or losing structural integrity. During hot forging, S35C exhibits excellent grain flow, which contributes to better mechanical strength and durability in the final component.

Another key factor is its stable austenitic phase during heating, which enhances the steel’s formability and reduces forging resistance. This makes it ideal for producing parts like gears, axles, crankshafts, and connecting rods that demand precise shaping and consistent performance.

Post-forging heat treatment—such as normalizing or quenching and tempering—can further refine the grain structure and improve mechanical properties, such as toughness and fatigue resistance.

In summary, S35C’s superior hot forging performance is not accidental—it results from a well-balanced composition and metallurgical stability, making it a trusted choice for precision-forged mechanical parts across various industries.