What are the properties of steel grade S235JR?

S235JR is a common non-alloy structural steel grade defined in the European standard EN 10025-2. Here are its key properties:

1. Chemical Composition (typical values):

• Carbon (C): ≤ 0.17%
• Manganese (Mn): ≤ 1.40%
• Phosphorus (P): ≤ 0.045%
• Sulfur (S): ≤ 0.045%
• Silicon (Si): ≤ 0.35%

2. Mechanical Properties:

• Yield Strength (ReH): ≥ 235 MPa (minimum)
• Tensile Strength (Rm): 360–510 MPa
• Elongation at Break (A): ≥ 26% (for thickness ≤ 16 mm)

3. Impact Toughness:

• Charpy V-Notch Test (KV): ≥ 27 J at +20°C (room temperature)

4. Applications:

• S235JR is widely used in general structural applications, such as:

5. Standards and Designations:

• EN 10025-2: European standard for hot-rolled structural steels.
• Equivalent grades in other standards:

6. Additional Notes:

• The "JR" in S235JR indicates its impact toughness at room temperature.
• It is suitable for welding and forming processes.

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