S355J2 Steel Plate Supplier Turkey

What is S355J2 steel plate?

S355J2 is EN 10025-2's 355 MPa structural steel with 27 J Charpy impact energy at −20 °C — the J2 class — delivered fully killed (Al ≥ 0.020 % or equivalent) with phosphorus and sulphur limited to 0.025 %. Material number 1.0577; with the +N suffix (normalised or normalised-rolled) it is the direct equivalent of DIN ST52-3 N, and the plate that BS 4360 50D users switched to. The −20 °C guarantee is not about Siberia: EN 1993-1-10 requires it for most welded members over about 20 mm even at moderate temperatures, because thickness and weld restraint raise the transition temperature. That is why J2 — not JR — is the grade behind bridges, crane girders, wind-tower flanges, heavy equipment and anything with a third-party design check. Turkish mills roll it in 3–150 mm; our stock covers 6–30 mm in 1 500, 2 000 and 2 500 mm widths.

Chemical composition

Ladle analysis limits — EN 10025-2 S355J2, max. % by mass
Element	C	Si	Mn	P	S	Cu
max. % (ladle)	0.20 (≤ 30 mm) / 0.22	0.55	1.60	0.025	0.025	0.55

Fully killed (Al ≥ 0.020 % typical). CEV max 0.45 (≤ 30 mm), 0.47 (30–40 mm), 0.49 (40–150 mm). Typical heat: C 0.16, Mn 1.40, Si 0.30, CEV 0.41.

Mechanical properties

Mechanical properties by thickness — EN 10025-2 S355J2
Thickness	Yield ReH min (MPa)	Tensile Rm (MPa)	Elongation A min	Impact KV (long.)
≤ 16 mm	355	470–630	22 %	27 J at −20 °C
> 16–40 mm	345	470–630	22 %	27 J at −20 °C
> 40–63 mm	335	470–630	21 %	27 J at −20 °C
> 63–80 mm	325	470–630	20 %	27 J at −20 °C
> 80–100 mm	315	470–630	20 %	27 J at −20 °C
> 100–150 mm	295	450–600	18 %	27 J at −20 °C

Equivalent grades

Nearest equivalents to S355J2 steel plate (check the certificate — equivalents are not identical)
System	Grade	Note
DIN 17100	ST52-3 N	direct predecessor (+N)
ASTM	A572 Gr. 50 (CVN −20 °C) / A709 Gr. 50	impact by supplement
JIS G3106	SM490C / SM490YB
GB/T 1591	Q355D	D = −20 °C
BS 4360	50D	historic
ISO 630	E355D
EN 10025-3	S355N	normalised fine-grain, −20 °C

Thickness range and stock sizes

S355J2 steel plate — what we hold and what we roll or import to order
Thickness	Widths × lengths	Availability
3–5 mm	1 500 × 6 000	to order (sheet)
6–15 mm	1 500 / 2 000 × 6 000	stock
20–30 mm	2 000 / 2 500 × 6 000	stock
40–80 mm	2 000–2 500 × 6 000–12 000	to order 2–4 weeks, +N
100–150 mm	2 000–2 500 × 6 000	to order 3–5 weeks, +N, UT tested

Weight per m² and per plate

Filter rows

S355J2 steel plate plate weight (density 7.85 kg/dm³, nominal thickness)
Thickness	kg/m²	1 500 × 6 000 (kg)	2 000 × 6 000 (kg)	2 500 × 12 000 (kg)
3 mm	23.6	212	283	707
4 mm	31.4	283	377	942
5 mm	39.3	353	471	1 178
6 mm	47.1	424	565	1 413
8 mm	62.8	565	754	1 884
10 mm	78.5	707	942	2 355
12 mm	94.2	848	1 130	2 826
15 mm	117.8	1 060	1 413	3 533
20 mm	157.0	1 413	1 884	4 710
25 mm	196.3	1 766	2 355	5 888
30 mm	235.5	2 120	2 826	7 065
40 mm	314.0	2 826	3 768	9 420
50 mm	392.5	3 533	4 710	11 775
60 mm	471.0	4 239	5 652	14 130
80 mm	628.0	5 652	7 536	18 840
100 mm	785.0	7 065	9 420	23 550
120 mm	942.0	8 478	11 304	28 260
150 mm	1,177.5	10 598	14 130	35 325

Nominal weights — mill tolerance to EN 10029 class A adds up to +4 % on thin plate; invoiced on theoretical weight unless agreed otherwise.

Welding, cutting and forming

S355J2 is designed to be welded: basic low-hydrogen consumables (E50 / G46), preheat 75–100 °C above 25 mm plate or on restrained multi-pass joints, interpass below 250 °C, heat input 1.0–2.5 kJ/mm to keep the −20 °C toughness through the HAZ. Above 50 mm and for Z-quality requirements (lamellar tearing on cruciform joints) order EN 10164 Z25 plate. Cold bending: inside radius 1.5 × t transverse, 2.5 × t longitudinal; hot forming at 900–1 000 °C then normalise. Flame-cut edges above 30 mm should be ground 1–2 mm on fatigue-loaded members. Laser to 20 mm, plasma to 50 mm.

Where it is used

Bridges, viaducts and gantries (EN 1090 EXC3)
Crane girders, runway beams and lifting equipment
Wind-turbine towers, flanges and foundations
Offshore, port and dredging equipment
Heavy construction machinery and mining structures
Thick welded frames, press bodies and machine beds

S355J2 vs S355K2 and S355J2+N

S355K2 has the same chemistry and strength but 40 J instead of 27 J at −20 °C — asked for in dynamic, fatigue-loaded structures and cold regions (Kazakhstan, Scandinavia); we import it to order. S355J2+N is J2 delivered normalised: fine grain, uniform properties through thick plate, less distortion after welding — mandatory above about 40 mm in most bridge and pressure-adjacent specifications. Compare with S355JR for the economy end and see S355J2+N and S355K2 for the upgrades.

Price

S355J2 carries a premium of about 80 USD/t over S235JR in our list, and about 10 USD/t over S355JR; +N delivery on heavy plate adds a further 10 USD/t. The bands below are the month's FOB Istanbul ranges for stock and for made-to-order heavy plate.

S355J2 · 6–30 mm735 – 885USD/MT · FOB Istanbul

S355J2+N · 40–150 mm745 – 895USD/MT · FOB Istanbul

Bands from our weekly export list (September 2026), FOB Istanbul, full-container quantities, excluding freight and certificates. Firm price per project on RFQ within one working day.

Export and packing

S355J2 steel plate is packed as follows: skids up to 5 t, strapped; ≥ 40 mm loose on bearers. Loading: 40' HC ≈ 24–25 t of 6 m plate; 12 m by flat-rack / breakbulk. Customs classification is by surface and alloy content — 7208, 7209, 7210, 7225 or 7226.

Term	Detail
MOQ	5 t of one thickness
Incoterms	FOB Istanbul · CIF / CFR Gulf, Africa · DAP EU, Balkans, Iraq, Caucasus · DAP Aktau
Lead time	Stock 6–30 mm: 3–7 working days; 3–5 mm and 40–150 mm to order 2–4 weeks
Packing	Skids up to 5 t, strapped; ≥ 40 mm loose on bearers
Container / truck	40' HC ≈ 24–25 t of 6 m plate; 12 m by flat-rack / breakbulk
Documents	Invoice, packing list, EN 10204 3.1 (3.2 on request), certificate of origin; SASO / SONCAP / PVoC on request
Payment	30% advance, balance against B/L copy; L/C at sight for orders above 100 t

Certificates and testing

S355J2 steel plate is delivered with the mill certificate EN 10204 3.1 — heat number, ladle analysis, tensile and impact results and the delivery condition. On request we add 3.2 witnessing by a classification society or an independent inspector. EN 10160 ultrasonic reports and supplementary impact tests at your design temperature are available on plate above 8 mm.

How to order

Send thickness × width × length, tonnage, delivery condition (+AR / +N), certificate level (3.1 or 3.2) and any UT or Z-quality requirement. Cut lists are priced per part with weights.

Standards

Grades

Grade data sheets (chemistry, mechanicals, equivalents) are on our reference site: S355J2 · S355JR · S355K2

Frequently asked questions

What type of steel is S355J2?

A fully-killed, unalloyed structural steel to EN 10025-2 with 355 MPa minimum yield, 470–630 MPa tensile and 27 J impact at −20 °C; material number 1.0577, formerly DIN ST52-3 N.

What is the difference between S355JR and S355J2?

Impact test temperature (+20 °C vs −20 °C), tighter P/S in J2 (0.025 %) and mandatory killed practice; strength and weldability are the same. J2 is required for thick, welded, dynamic or cold-service structures.

What steel grades are equivalent to S355J2+N?

DIN ST52-3 N, BS 4360 50D, JIS SM490C, GB Q355D and EN 10025-3 S355N are the closest; ASTM A572 Gr. 50 with a −20 °C Charpy supplement is the usual American substitute.

What is the equivalent of S355J2 in India?

IS 2062 E350 (Grade B or C) — E350C has 27 J at −20 °C and is the proper match; E350B is tested at 0 °C.

Does S355J2 need preheat?

Not below 25 mm in a dry workshop; 75–100 °C above 25 mm, on restrained joints or in cold conditions, always with low-hydrogen consumables.

What S355J2 thicknesses are in stock in Turkey?

6–30 mm in 1 500, 2 000 and 2 500 mm widths at our Dilovası warehouse; 3–5 mm and 40–150 mm rolled to order in 2–5 weeks.

How much does a 20 mm S355J2 plate weigh?

157 kg per m²; a 2 000 × 6 000 mm plate is 1 884 kg and a 2 500 × 12 000 mm plate 4 710 kg.