​What Domestic Material Does S45C Correspond To?

S45C steel is a medium carbon steel, corresponding to the domestic 45# steel in China. Here is a specific introduction to 45# steel, which is designated as GB/T 699 in Chinese standards.

Chemical composition:

• Carbon (C): 0.42% ~ 0.50%

• Manganese (Mn): 0.50% ~ 0.80%

• Silicon (Si): 0.17% ~ 0.37%

• Phosphorus (P): ≤ 0.035%

• Sulfur (S): ≤ 0.035%

Mechanical properties (typical values):

• Tensile strength (Rm): 570 - 790 MPa

• Yield strength (Rel): 335 - 480 MPa

• Elongation (A): ≥ 16%

• Impact energy (Akv): (at room temperature) usually above 30 J

Characteristics:

• Good mechanical properties: Suitable for parts that require certain strength and toughness.

• Easy to process: Excellent machinability, which can further improve mechanical properties through heat treatment.

• Weldability: Having good welding performance under appropriate preheating conditions.
Application fields:

• Machinery manufacturing: Used for making various mechanical parts such as gears, lead screws, etc.

• Automotive industry: Used for manufacturing automotive components.

• Tool manufacturing: Can be used for making certain tool parts.

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