Material S355 Steel Properties, Equivalent Grade, EN 10025-2

EN 10025 S355 Steel Grade

S355 steel is a European standard structural steel which is commonly used in Europe, the material is better than S235 and S275 structural steel in yield strength, tensile strength and other properties. According to EN 10025, S355 material is divided into the following quality grades for example:

Material S355 Meaning (Designation)

The following letters and numbers explains steel grade S355 meaning:

• “S” is the abbreviation of “Structural steel”;
• “355” indicates the minimum yield strength value for the flat and long steel thickness ≤ 16mm;
• “JR” means the impact energy value is minimum 27 J at room temperature (20°C);
• “J0” indicates the steel can withstand the impact energy at least 27 J at 0°C;
• “J2” denotes the minimum impact energy value is 27 J at -20°C;
• “K2” denotes the minimum impact energy value is 40 J at -20°C.
• J4: minimum 27J at -40 °C
• J5: minimum 27J at -50 °C
• M: Thermomechanically rolled
• N: Normalized or normalized rolled
• L: Low temperature
• W: Weather resistant
• C: Special cold forming
• H: Hollow section
• G: Other characteristics, if required, with 1 or 2 digits.
• P: Sheet piling
• P (EN 10025-5): For the grade with a greater phosphorus content (only in the case of S355 grade)
• D: Hot dip coating
• +Z: Hot dip zinc (galvanized) coating
• More designation & meaning of European steel names

S355 Steel Properties and Specification

The tables below show the material grade S355 steel properties and specification according to EN 10025-2 standard, including chemical composition, yield strength, tensile strength and elongation, etc.

Chemical Composition

The datasheet below shows material S355 chemical composition based on heat analysis.

Remarks:

• For S355J0, S355J2 and S355K2: C ≤ 0.22% for thickness > 30 mm.
• C by agreement for profiles with a nominal thickness > 100 mm.
• For long products, the P and S content can be 0.005% higher.

Mechanical Properties

The datasheet below gives EN 10025 S355 steel mechanical properties such as yield strength, tensile strength and elongation.

Yield Strength

Tensile Strength

Elongation at Break

Note:

• t = Thickness (mm)
• 1 MPa = 1 N/mm2

S355 Steel Equivalent Grade

EN 10025-2 S355 steel equivalent grades are listed in the table below, including US ASTM AISI SAE, German DIN, ISO, Japanese JIS, Chinese GB, Indian IS, Australian/New Zealand AS/NZS and Canadian Standard CSA. (For reference)