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

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EN 10025 S355 Steel

S355 steel is a European standard structural steel grade, according to EN 10025-2: 2004, material S355 is divided into 4 main quality grades:

  • S355JR (1.0045),
  • S355J0 (1.0553),
  • S355J2 (1.0577) and
  • S355K2 (1.0596).

The properties of structural steel S355 is better than steel S235 and S275 in yield strength and tensile strength.

Steel Grade S355 Meaning (Designation)

The following letters and numbers explains the steel grade S355 meaning.

  • “S” is short for “structural steel”
  • “355” refers to the minumum yield strength value for the flat and long steel thickness ≤ 16mm.
  • “JR” means the impact energy value is minumum 27 J at room temperature (20℃).
  • “J0” can withstand the impact energy at least 27 J at 0℃.
  • “J2” related to the minumum impact energy value is 27 J at -20℃.
  • “K2” refers to the minumum impact energy value is 40 J at -20℃.

Datasheet and Specification

Below are the tables to show the steel grade S355 datasheet including chemical composition, yield strength, tensile strength and elongation, etc. All data sheet of DIN EN 10025-2 is the same as BS EN 10025-2 and other EU member states.

Chemical Composition

The datasheet below shows grade S355 steel chemical composition.

S355 Chemical Composition % (≤)
Standard Steel Grade C Si Mn P S Cu N Method of deoxidation
EN 10025-2 S355 S355JR 0.24 0.55 1.60 0.035 0.035 0.55 0.012 Rimmed steel is not allowed
S355J0 (S355JO) 0.20 0.55 1.60 0.030 0.030 0.55 0.012
S355J2 0.20 0.55 1.60 0.025 0.025 0.55 Fully killed
S355K2 0.20 0.55 1.60 0.025 0.025 0.55 Fully killed

Mechanical Properties

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

Yield Strength

S355 Yield Strength (≥ N/mm2); Dia. (d) mm
Steel Steel Grade (Steel Number) d≤16 16< d ≤40 40< d ≤63 63< d ≤80 80< d ≤100 100< d ≤150 150< d ≤200 200< d ≤250
S355 S355JR (1.0045) 355 345 335 325 315 295 285 275
S355J0 (1.0553)
S355J2 (1.0577)
S355K2 (1.0596)

Tensile Strength

S355 Tensile Strength (≥ N/mm2)
Steel Steel Grade d<3 3 ≤ d ≤ 100 100 < d ≤ 250
S355 S355JR 510-680 470-630 450-600
S355J0 (S355JO)
S355J2
S355K2

Elongation

Elongation (≥%); Thickness (d) mm
Steel Steel Grade 3≤d≤40 40< d ≤63 63< d ≤100 100< d ≤ 150 150< d ≤ 250
S355 S355JR 22 21 20 18 17
S355J0 (S355JO)
S355J2
S355K2 20 19 18 18 17

S355 Steel Equivalent Grade

EN 10025-2 S355 steel equivalent to US ASTM AISI SAE, Germany DIN, ISO, Japanese JIS, Chinese GB, and Indian standard. (For reference)

S355 steel equivalent grade
European Union US Germany China Japan Indian ISO
Standard Grade Standard Grade Standard Grade Standard Grade Standard Grade Standard Grade Standard Grade
EN 10025-2 S355JR (1.0045) ASTM A572/A572M Grade 50 GB/T 1591 Q355, Q355B; Q345B (Q345) JIS G3135 SPFC590 IS 2062 E350 ISO 630-2 S355B
S355J0 (1.0553) DIN 17100: 1980 St52-3U GB/T 1591 Q355C; Q345C ISO 630-2 S355C
S355J2 (1.0577);
S355J2G4
St52 GB/T 1591 Q355D; Q345D ISO 630-2 S355D
S355K2 (1.0596);
S355K2G4
GB/T 1591 Q345E; Q355D

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1 Comment
  1. JAMES WONG says

    Can you tell me the difference between S355 and E355 grade.

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