S355ML Material Properties EN 10025-4 Supplier

 

 

S355ML Material Properties EN 10025-4 Supplier

Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355ML Material Properties EN 10025-4 Steel Plates

Gangsteel is the expert supplier for S355ML material properties EN 10025-4 steel plates, providing comprehensive data on this thermomechanically rolled (TMCP) fine-grain structural steel to facilitate precise engineering and compliance worldwide. As defined in EN 10025-4:2004 (2019 revision), S355ML offers a minimum yield strength of 355 MPa, exceptional weldability (CEV ≤0.39), and low-temperature toughness (≥27 J at –50 °C longitudinal), making it indispensable for high-performance applications.

 We stock over 5,000 tons of S355ML plates—thicknesses 6–200 mm, widths 1500–4200 mm, lengths up to 18 meters—produced by leading mills like HBIS and Shougang with full PED 2014/68/EU and CPR 305/2011 certification. Every plate includes detailed EN 10204-3.1/3.2 MTCs outlining material properties, plus third-party verifications from DNV-GL, ABS, Lloyd's Register, Bureau Veritas, CCS, RINA, KR, TÜV, or SGS.

Material properties of S355ML—encompassing chemical composition, mechanical strength, density (7.85 g/cm³), hardness (140-180 HBW), and impact resistance—are key to its success in weight-optimized designs under Eurocode 3, reducing sections 15-20% versus S355J2 while ensuring fatigue life >10^7 cycles at 160 MPa. Z25/Z35 through-thickness and 100% UT EN 10160 S2/E2 are standard for flaw detection. Gangsteel equips you with property data for FEA modeling, weld procedure qualification (WPS), and certification, with fast delivery (3–7 days globally) and services like cutting, beveling, drilling, rolling, and priming. Delve into our en 10025 4 High Strength Structural Steel portfolio for the complete series. For a foundational overview, explore S355ML Meaning EN 10025-4 Structural Steel Supplier.

 

What is S355ML Material Properties EN 10025-4?

The material properties of S355ML under EN 10025-4:2004 (2019) define its identity as a thermomechanically rolled (TMCP) weldable fine-grain structural steel engineered for high-strength, low-temperature demands. "S" signifies structural suitability for load-bearing; "355" the nominal minimum yield strength of 355 MPa (transverse, ≤16 mm thick); "M" the TMCP delivery, involving controlled hot rolling (900-1100 °C) and accelerated cooling (20-40 °C/s) to form a refined ferrite-bainite microstructure; and "L" enhanced Charpy V-notch impact of ≥27 J at –50 °C longitudinally, per EN ISO 148-1.

TMCP's material properties—low residual stresses (<100 MPa), fine grains (ASTM 8-10), and CEV ≤0.39—yield superior weldability (no preheat to 80 mm), ductility (≥22% elongation), and isotropy, outperforming normalized S355NL (EN 10025-3) by 20-30% in distortion resistance. Density 7.85 g/cm³ ensures accurate mass calculations for buoyancy in offshore FEA, while hardness 140-180 HBW supports machinability (feed rates 0.2-0.3 mm/rev). Microalloying (Nb ≤0.05%, V ≤0.10%, Ti ≤0.05%) pins boundaries for toughness, with P/S ≤0.025/0.020% minimizing brittleness.

These properties enable S355ML in Eurocode 3 fatigue designs (S-N >10^7 cycles at 160 MPa) and DNV-OS-B101 offshore, where KV prevents cleavage (ductile ≥50% fibrous). Gangsteel verifies properties via spectrographic/UT, providing data for CTOD (>0.4 mm at –40 °C) and KIc (>140 MPa√m). For chemical specifics, see S355ML Chemical Composition EN 10025-4 Supplier; for mechanical, S355ML Mechanical Properties EN 10025-4 Plate Supplier.

 

Chemical Composition – Ladle and Product Analysis Combined

Element	Ladle Max (%)	Product Deviation (%)	Typical Actual (%) – Gangsteel Stock	Role in Material Properties
C	0.14	+0.02	0.09–0.12	Low C for weld ductility; base for yield
Si	0.50	+0.05	0.20–0.40	Deoxidizer; stabilizes ferrite for toughness
Mn	1.60	+0.10	1.20–1.50	Strengthens solid solution; elongation aid
P	0.025	+0.005	≤0.018	Min P for grain boundary cohesion
S	0.020	+0.005	≤0.015	Low S for inclusion-free KV
Nb	0.05	+0.01	0.02–0.04	Pins grains for fine structure/elongation
V	0.10	+0.02	0.04–0.08	Precipitates for hardening/toughness
Al min	0.020	+0.030 (total)	0.025–0.045	Deoxidizes for clean matrix/hardness control
Ti	0.05	+0.03	0.01–0.03	Nitride former for isotropy
Cr	0.30	+0.05	0.10–0.25	Hardenability for Rm range
Ni	0.50	+0.05	0.20–0.40	Low-temp transition for KV
Mo	0.10	+0.03	≤0.05	HAZ stability
Cu	0.55	+0.03	0.20–0.35	Deoxidizer; minor corrosion resistance
N	0.015	+0.003	≤0.012	Low for nitride-free properties
CEV max	0.39	N/A	0.32–0.38	Weld index; overall ductility key

CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15. Equivs match. Full: S355ML Chemical Composition EN 10025-4 Supplier.

 

Mechanical Properties – Full Thickness Range up to 200 mm (Transverse)

Thickness (mm)	ReH min (MPa)	Rm (MPa)	A5 min (%)	KV min (J, long. –50 °C)
≤16	355	470–630	22	27
16<t≤40	345	470–630	22	27
40<t≤63	335	470–630	22	27
63<t≤80	325	470–630	22	27
80<t≤100	315	470–630	22	27
100<t≤120	305	450–610	22	27
120<t≤150	295	450–610	22	27
150<t≤200	285–295*	450–610	22	27

*Agreement >150 mm; Gangsteel 295 MPa to 180 mm. Hardness 140-180 HBW; density 7.85 g/cm³. Curves: S355ML Mechanical Properties EN 10025-4 Plate Supplier.

 

Comparison Within the Standard

S355ML properties vs. family.

Property/Grade	S275M/ML	S355M	S355ML	S420M/ML
Yield (MPa, ≤16 mm)	275	355	355	420
Impact Temp (Long.)	-20°C (M)/-50°C (ML)	-20°C	-50°C	-20°C (M)/-50°C (ML)
Min KV (J)	40/-20°C; 27/-50°C	40/-20°C	27/-50°C	40/-20°C; 27/-50°C
CEV Max	0.38	0.39	0.39	0.43
Elong. A5 Min (%)	24	22	22	19
Tensile (MPa)	370-530	470-630	470-630	520-680
No-Preheat (mm)	100	80	80	60
Wt Save vs S355J2	5-10%	15-20%	15-20%	20-25%
Cost + vs S355J2 (USD/t)	+40-60	+80-120	+100-150	+150-200
Density (g/cm³)	7.85	7.85	7.85	7.85
Apps	Light frames	Bridges	Offshore	Cranes
Gangsteel Stock	High	V. High	Highest	Med

S355ML balanced properties; vs S355M, –50 °C KV; vs S275ML, 30% stronger; vs S420ML, ductility. See S355M vs S355ML EN 10025-4 Steel Plate Comparison Supplier.

 

Equivalent International Grades

Properties equivs match S355ML.

Standard	Equivalent Grade	Key Match Notes	Typical Use Case
ASTM/ASME	A572 Gr.50 + Z35	Yield 345 MPa; properties align	U.S. properties calc
JIS G 3106	SM490A	Rm 490 MPa; ductility same	Japanese properties FEA
GB/T 1591	Q355E	Low-temp properties	China-EN properties
API 2W	Grade 50	Offshore properties	Low-temp platforms
EN 10025-6	S355QL	QT properties; S355ML cheaper	Heavy properties loads

Indicative; TMCP properties better HAZ. Dual-cert. Full: S355ML Equivalent Material EN 10025-4 Plate Supplier.

 

Applications & Design Considerations for S355ML Properties

Properties for Eurocode 3, 18% less steel.

• Offshore: Foundations, yield/KV vs brittle; fatigue 10^8 cycles 140 MPa DNV-RP-C203.
• Cold Bridges: Girders, Z35 tears; HIC Class 1.
• Pipes: Penstocks, A5 3% drifts EN 1998-1; C4M <0.08 mm/yr epoxy.
• Fab: Booms, 3t radius; 55 yr ICCP.

Notes: Interpass 150°C; ER50-2. FEA properties input, 2% hardening. Eco: 97% recycle, 20% CO2 save. Gangsteel V-50°, UT S4.

 

Why Choose Gangsteel for S355ML Properties

• 5,000+ t stock.
• Mill-direct 70-120 USD/t save; >700 MT tiers.
• Process: laser ±0.4 mm, X-bevel, 140 mm bore, 500 mm roll, C5I 180 µm.
• Cert: ISO 9001/14001, NACE sour, EN 1090 EXC4.
• Legacy: Siemens 1,000+ t (Hornsea), Total (Ichthys)—OTIF 100%.

To 92+ countries: Rotterdam 7 days.

 

FAQ

Q1: S355ML vs S355M properties difference?

A: Impact temp: S355ML –50 °C ≥27 J for cold (offshore/Arctic); S355M –20 °C ≥40 J for temperate. Yield/chem/elong/density same—ML for < –20 °C (DNV-OS-B101). Gangsteel stocks both with full properties MTCs.

Q2: Welding preheat for S355ML properties?

A: None to 80 mm (CEV 0.32-0.38); low-H E7018 H4. Thicker: 70-120 °C (EN ISO 13916). TMCP low stress preserves properties; saves 50 °C vs J2; CET per heat WPS.

Q3: S355ML for pressure vessels properties?

A: Yes, PED III (EN 13445); derate >63 mm. UT S3/E3; RT opt seams. Properties aid fracture (KIc >140 MPa√m); cost-effective vs QT; dual ASME/EN.

Q4: S355ML vs S355J2 properties price?

A: +100-140 USD/t for TMCP/-50 °C properties; offset 15-20% thinner + 25% fatigue. FOB 700-800 USD/t (25 mm); vol 10-15% discount.

Q5: Z35 in S355ML properties?

A: Z25 std; Z35 stocked (≥35% RA EN 10164 Cl.3) tension; +15-25 USD/t. Properties Norsok M-120 welds; density neutral.

Q6: ASTM equiv for S355ML properties?

A: A572 Gr.50 + Z35; yield 345 MPa, properties align –50 °C KV add. A633 Gr.C normalized; TMCP HAZ better. Dual-cert stocked.

Q7: Custom S355ML lead time properties?

A: Stock 1-3 days; processed 2-5 days; mill 3-5 weeks. 95% OTIF; air <10 MT 24-48 hrs; properties verified MTC.

 

Contact Gangsteel

For S355ML properties plates, quote now.

Email: admin@gangsteel.com WhatsApp/WeChat/Mobile: +86 135 9887 9167 Website: https://gangsteel.net/

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