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S420n steel specifications

S420N Steel Specifications

As a premier exporter and manufacturer of high-quality structural steel plates, Gangsteel specializes in producing EN 10025-3 S420N steel.

S420N steel specificationscover high-strength normalized fine-grain structural steel with 420 MPa minimum yield and 40 J impact at -20°C.

Our S420N plates are delivered in normalized (+N) condition per EN 10025-3:2019.

S420N Steel Specifications: Standard & Designation

Item	Specification
Standard	EN 10025-3:2019
Grade	S420N
Material No.	1.8902
Delivery Condition	Normalized (+N)
Thickness Range	6 mm to 250 mm
Width	1500–3500 mm
Length	Up to 18,000 mm

S420NL= same specs, impact at -50°C (27 J).

S420N Steel Specifications: Chemical Composition (Ladle Analysis, Max %)

Element	C	Si	Mn	P	S	Cr	Mo	Ni	V	Nb	Ti	Al	Cu	N	CEV
Max	0.20	0.60	1.00–1.70	0.025	0.020	0.30	0.10	0.80	0.20	0.05	0.05	≥0.020	0.55	0.025	0.48

CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15Al ≥ 0.020% = fine-grain control.

S420N Steel Specifications: Mechanical Properties (Normalized, Min Values)

Thickness (mm)	Yield ReH (MPa)	Tensile Rm (MPa)	Elongation A (%)	Impact (Longitudinal)	Transverse
≤ 16	420	520–680	19	40 J at -20°C	27 J
16 < t ≤ 40	400	520–680	19	40 J at -20°C	27 J
40 < t ≤ 63	390	520–680	19	40 J at -20°C	27 J
63 < t ≤ 80	380	520–680	18	40 J at -20°C	27 J
80 < t ≤ 100	370	520–680	18	40 J at -20°C	27 J
100 < t ≤ 200	360	500–650	18	40 J at -20°C	27 J
200 < t ≤ 250	340	500–650	18	40 J at -20°C	27 J

Elongation per Lo = 5.65 √So. Test direction: transverse unless specified.

S420N Steel Specifications: Testing & Certification

Test	Requirement
Tensile Test	Per EN 10002-1
Impact Test	40 J longitudinal at -20°C
Ultrasonic	EN 10160 (optional)
Z-Test	Z15/Z25/Z35 (optional)
Certification	EN 10204 3.1 / 3.2

S420N Steel Specifications: Welding & Processing

Weldability: CEV ≤ 0.48 — no preheat ≤50 mm
Preheat (>50 mm): 100–150°C
Interpass Temp: Max 200°C
PWHT: Optional (550–650°C)
Forming: Hot forming >850°C; re-normalize if <720°C

Why Gangsteel for S420N?

Mill-Direct Supply
Full Certification– EN 10204 3.1
Stock– 6–250 mm
Global Export

Contact: admin@gangsteel.comProduct Page: en 10025 3 s420n normalized structural steel plate

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