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

EN 10025 S355 Steel Grade

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

• S355JR (1.0045)
• S355J0 (1.0553)
• S355J2 (1.0577)
• S355K2 (1.0596)

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

Material 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°C).
• “J0” can withstand the impact energy at least 27 J at 0°C.
• “J2” related to the minumum impact energy value is 27 J at -20°C.
• “K2” refers to the minumum impact energy value is 40 J at -20°C.

Properties and Specification

The tables below show the material grade S355 steel properties and specification including chemical composition, yield strength, tensile strength and elongation, etc. All datasheet of DIN EN 10025-2 is the same as BS EN 10025-2 and other EU member states.

Chemical Composition

The datasheet below shows material S355 chemical composition comparison.

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	–

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 (MPa, ≥); Dia. (d) in mm
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 (MPa, ≥)
Steel	Grade	d<3	3 ≤ d ≤ 100	100 < d ≤ 250
S355	S355JR	510-680	470-630	450-600
	S355J0 (S355JO)
	S355J2
	S355K2

Elongation at Break

		Elongation (%, ≥); Thickness (d) in mm
Steel	Quality 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 Grades

EN 10025-2 S355 steel equivalent grades are listed in the table below, including US ASTM AISI SAE, Germany DIN, ISO, Japanese JIS, Chinese GB, and Indian standard. (For reference)

S355 steel equivalent grades

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