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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 % (≤)
StandardSteelGradeCSiMnPSCuNMethod of deoxidation
EN 10025-2S355S355JR0.240.551.600.0350.0350.550.012Rimmed steel is not allowed
S355J0 (S355JO)0.200.551.600.0300.0300.550.012
S355J20.200.551.600.0250.0250.55Fully killed
S355K20.200.551.600.0250.0250.55Fully 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
SteelSteel Grade (Steel Number)d≤1616< d ≤4040< d ≤6363< d ≤8080< d ≤100100< d ≤150150< d ≤200200< d ≤250
S355S355JR (1.0045)355345335325315295285275
S355J0 (1.0553)
S355J2 (1.0577)
S355K2 (1.0596)

Tensile Strength

S355 Tensile Strength (≥ N/mm2)
SteelSteel Graded<33 ≤ d ≤ 100100 < d ≤ 250
S355J0 (S355JO)


Elongation (≥%); Thickness (d) mm
SteelSteel Grade3≤d≤4040< d ≤6363< d ≤100100< d ≤ 150150< d ≤ 250
S355J0 (S355JO)

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 UnionUSGermanyChinaJapanIndianISO
EN 10025-2S355JR (1.0045)ASTM A572/A572MGrade 50GB/T 1591Q355, Q355B; Q345B (Q345)JIS G3135SPFC590IS 2062E350ISO 630-2S355B
S355J0 (1.0553)DIN 17100: 1980St52-3UGB/T 1591Q355C; Q345CISO 630-2S355C
S355J2 (1.0577);
St52GB/T 1591Q355D; Q345DISO 630-2S355D
S355K2 (1.0596);
GB/T 1591Q345E; 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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