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:

S355 Steel Group
Standard	Steel/Quality Grade	Material Number
DIN EN 10025-2	S355JR	1.0045
	S355J0	1.0553
	S355J2	1.0577
	S355K2	1.0596
DIN EN 10025-3	S355N	1.0545
	S355NL	1.0546
DIN EN 10025-4	S355M	1.8823
	S355ML	1.8834
DIN EN 10025-5	S355J0W	1.8959
	S355J2W	1.8965
	S355K2W	1.8967
	S355J4W	1.8787
	S355J5W	1.8991
	S355J0WP	1.8945
	S355J2WP	1.8946
EN 10149-2	S355MC	1.0976
EN 10149-3	S355NC	1.0977
EN 10210-1	S355J0H	1.0547
	S355J2H	1.0576
	S355K2H	1.0512
	S355NH	1.0539
	S355NLH	1.0549
EN 10210-3	S355MH	1.8845
	S355MLH	1.8846
EN 10248-1	S355GP	1.0083

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.

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	–

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

S355 Yield Strength (MPa, ≥); Thickness (t), mm
Steel	Grade (Steel Number)	t≤16	16< t ≤40	40< t ≤63	63< t ≤80	80< t ≤100	100< t ≤150	150< d ≤200	200< t ≤250	250< t ≤400
S355	S355JR (1.0045)	355	345	335	325	315	295	285	275	265
	S355J0 (1.0553)
	S355J2 (1.0577)
	S355K2 (1.0596)

Tensile Strength

S355 Tensile Strength (MPa, ≥)
Steel	Grade	t<3	3 ≤ t ≤ 100	100 < t ≤ 400
S355	S355JR	510-680	470-630	450-600
	S355J0 (S355JO)
	S355J2
	S355K2

Elongation at Break

Elongation (%, ≥); Thickness (t) mm; L0 = 80 mm
Material	≤1	1< t ≤1.5	1.5< t ≤ 2	2<t ≤ 2.5	2.5< t < 3	Orientation of test pieces
S355	14	15	16	17	18	Parallel
	12	13	14	15	16	Transverse

Elongation (%, ≥); Thickness (t) mm; L0 = 5.65 √So
Material	t≤40	40< t ≤63	63 < t ≤100	100 < t ≤ 150	150 < t ≤ 400	Orientation of test pieces
S355	22	21	20	18	17	Parallel
	20	19	18	18	17	Transverse

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)

S355 Steel Equivalent Grades
European Union		US		Germany		China		Japan		Indian		ISO		Australian/New Zealand		Canada
Standard	Grade (Steel number)	Standard	Grade	Standard	Grade	Standard	Grade	Standard	Grade	Standard	Grade	Standard	Grade	Standard	Grade	Standard	Grade: SI (Imperial)
EN 10025-2	S355JR (1.0045)	ASTM A572/A572M	A572 Grade 50			GB/T 1591	Q355, Q355B; Q345B (Q345)	JIS G3135	SPFC590	IS 2062	E350	ISO 630-2	S355B	AS/NZS 3679.1	350	CSA G40.20/G40.21	350W (50W); 350WT (50WT)
	S355J0 (1.0553)			DIN 17100: 1980	St52-3U	GB/T 1591	Q355C; Q345C			IS2062	E 350	ISO630-2	S355C	AS/ NZS 3679.1	350L0	CSA G40.20/ G40.21	350W (50W); 350WT (50WT)
	S355J2 (1.0577); S355J2G3				St52	GB/T 1591	Q355D; Q345D			IS 2062	E350	ISO 630-2	S355D	AS/NZS 3679.1	350L20	CSA G40.20/G40.21	350W (50W); 350WT (50WT)
	S355K2 (1.0596); S355K2G4					GB/T 1591	Q345E; Q355D