S355N Steel Plate Applications & Ordering Guide

EN 10025-3 S355N (1.0545) is specified for industrial fabrications where the drawing or material list names this grade. This applications page explains where the grade is used, what service conditions drive selection, and which certificate details belong on the purchase order. Gangsteel supplies EN 10025-3 S355N (1.0545) with EN 10204 mill test certificates.

Typical Applications and Service Conditions

EN 10025-3 S355N (1.0545) plate is ordered for pressure equipment, process vessels, heat-exchanger related fabrications, structural members under the governing code, and project packages that call the grade by name. Match the mill test certificate grade mark to the calculation sheet; do not treat near-equivalents as automatic substitutes.

Service drivers include the design temperature and pressure of the governing code (ASME, EN/PED, class society, or project specification), weld procedure qualification needs, toughness or creep allowables where applicable, and inspection scope. Delivery condition Normalized or normalized rolled (+N) should be stated explicitly on the purchase order.

Industry Use Cases

Pressure equipment and process: shells, heads, and related platework when drawings name EN 10025-3 S355N (1.0545). Power and energy: boiler and heat-recovery fabrications under the ordered edition. Marine / offshore (when classed): only when the society material list names this exact grade stamp. Always keep heat-number traceability on cut pieces.

Chemical Composition - Supporting Data (EN 10025-3 S355N (1.0545))

Ladle analysis band for S355N. Exact CEV and residual limits depend on EN 10025-3 edition and thickness option.

Element / rule	Requirement
C, max (t<=100 mm typical ladle)	0.20
Si, max	0.50
Mn	0.90-1.65
P, max	0.030
S, max	0.025
Nb, max	0.05
V, max	0.12
Al total, min	0.020
N, max	0.015
CEV, max (t<=63 mm typical)	0.43

Mechanical Properties - Supporting Data (EN 10025-3 S355N (1.0545))

Confirm thickness, specimen orientation, and any supplementary impact, UT, or hardness requirements on the PO.

Property	Requirement
Yield ReH min (t<=16 mm)	355 MPa
Yield ReH min (16 < t <= 40 mm)	345 MPa
Tensile Rm (t<=100 mm typical)	470-630 MPa
Elongation A, min	22%
Impact	-20 deg C (longitudinal 40 J typical option)
Delivery	+N normalized / normalized rolled

Related / Near-Equivalent Grades

Near-equivalents are for cross-reference only. They are not automatic code substitutes. Substitution requires engineer approval and matching certificate scope.

System	Grade	Note
EN 10025-3	S355NL	Colder impact (-50 deg C)
EN 10025-2	S355JR / J0 / J2	Non-alloy structural; different delivery/impact rules
ASTM	A572 Grade 50 / A633 (approx.)	Not identical - confirm design code

Frequently Asked Questions

Where is EN 10025-3 S355N (1.0545) typically applied?

EN 10025-3 S355N (1.0545) is applied where design documents, class material lists, or purchaser specs name this grade for pressure, process, structural, or marine fabrications as applicable. Match the MTC marking to the drawing.

What service conditions drive selection of EN 10025-3 S355N (1.0545)?

Design temperature and pressure, toughness or creep allowables, weldability, corrosion or process media, and the governing code edition drive selection. Delivery condition Normalized or normalized rolled (+N) must align with the ordered specification.

Can a near-equivalent replace EN 10025-3 S355N (1.0545) on an applications drawing?

Not without redesign and written approval. Near-equivalents differ in chemistry, heat treatment, impact temperature, or product form. Commercial swaps create non-conformance when the dossier names EN 10025-3 S355N (1.0545).

What fabrication notes matter for EN 10025-3 S355N (1.0545)?

Use approved WPS/PQR packages for the thickness and filler, control heat input, and preserve heat-number traceability on cut pieces. State any supplementary UT, PMI, or impact tests on the purchase order.

What certificate and marking should an applications PO demand?

EN 10204 3.1 is standard; 3.2 when a purchaser-appointed inspector witnesses tests. The MTC should show heat analysis, tensile results, delivery condition, and heat number aligned with EN 10025-3 S355N (1.0545).

How should I RFQ EN 10025-3 S355N (1.0545) plate from Gangsteel for a project?

Send EN 10025-3 S355N (1.0545), thickness x width x length (or nesting list), quantity, delivery condition, optional NDT/PMI, certificate type, destination, and any dual-mark needs. Note the end use when special flatness or cut-to-size packaging is required.

Ordering and Mill Certificates

State grade EN 10025-3 S355N (1.0545), dimensions, quantity, delivery condition, optional NDT/PMI, and certificate (EN 10204 3.1 standard; 3.2 when third-party inspection is ordered). Gangsteel supplies export plate and related products with mill test certificates. Contact Gangsteel for stock and mill production RFQs.