S235 Mild Steel Sheet/Carbon Steel Plate

S235 is a widely used non-alloy mild steel (also called carbon steel) specified in the European standard EN 10025-2. It is valued for its excellent workability, affordability, and reliable structural performance, making it a staple in construction, fabrication, and general engineering. Below is a detailed overview of S235 mild steel sheets/plates:

Key Definition & Standard

Designation: "S" stands for "structural steel," and "235" indicates the minimum yield strength of 235 MPa (at room temperature).

Standard: Defined under EN 10025-2 (European standard for hot-rolled structural steels), which specifies chemical composition, mechanical properties, and quality requirements.

 Chemical Composition

S235 is a low-carbon steel with tightly controlled chemistry to ensure workability and consistency:

 

Carbon (C): ≤ 0.20% (low carbon content enhances weldability and ductility).

Manganese (Mn): 0.40–1.20% (improves strength and hot working performance).

Silicon (Si): ≤ 0.55% (aids deoxidation during production).

Phosphorus (P): ≤ 0.045% (harmful impurity, limited to avoid brittleness).

Sulfur (S): ≤ 0.045% (controlled to prevent hot cracking during welding/rolling).

Iron (Fe): Balances the composition (remaining percentage).

Mechanical Properties

S235 mild steel sheets/plates offer balanced strength and ductility, with typical properties as follows:

 

Tensile Strength (σb): 360–510 MPa

Yield Strength (σs): ≥ 235 MPa (the defining characteristic of the grade).

Elongation (δ5): ≥ 25% (excellent ductility, allowing easy bending, forming, and shaping).

Impact Toughness: ≥ 27 J (tested at 20°C for S235JR, the most common variant; ensures resistance to brittle fracture in mild environments).

Hardness: ~120–150 HBW (soft enough for machining, drilling, and cold working without excessive tool wear).

 

 

 

 

 

 

 

 

 

Specifications (Sheets/Plates)

S235 is available in various dimensions to suit diverse applications:

 

Thickness:

Sheets: 0.5 mm – 6 mm (thin gauge for general fabrication).

Plates: 6 mm – 200 mm (thick gauge for structural use).

Width: 1000 mm – 3000 mm (standard widths: 1250 mm, 1500 mm, 2000 mm).

Length: 2000 mm – 12000 mm (custom lengths available via rolling).

 

 

 

 

 

 

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Relying on the superior conditions and strong advantages of mass production, we are able to meet the different needs of our customers.

 

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