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Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355ML Plate EN 10025-4 TMCP Structural Steel
Gangsteel stands as the premier global supplier for S355ML plate EN 10025-4 TMCP structural steel, combining vast inventory, expert processing, and unparalleled compliance to meet the needs of demanding structural projects worldwide. As a thermomechanically controlled processed (TMCP) weldable fine-grain structural steel under EN 10025-4:2004 (2019 revision), S355ML plates deliver a minimum yield strength of 355 MPa, superior low-temperature toughness (≥27 J at –50 °C longitudinal), and exceptional weldability (CEV ≤0.39, no preheat up to 80 mm).
We stock over 5,000 tons of S355ML plates in thicknesses 6–200 mm, widths 1500–4200 mm, and lengths up to 18 meters, produced by elite mills such as HBIS and Shougang with full PED 2014/68/EU and CPR 305/2011 certification. Each plate ships with comprehensive EN 10204-3.1/3.2 mill test certificates, third-party inspections from DNV-GL, ABS, Lloyd's Register, Bureau Veritas, CCS, RINA, KR, TÜV, or SGS, Z25/Z35 through-thickness options, and 100% UT EN 10160 S2/E2 testing.
The TMCP process in S355ML plates—precise hot rolling at 900-1100 °C followed by accelerated cooling (20-40 °C/s)—creates a refined ferrite-bainite microstructure, ensuring fine grains (ASTM 8-10) for isotropy, ductility (≥22% elongation), and fatigue resistance (>10^7 cycles at 160 MPa). At 7.85 g/cm³ density and 140-180 HBW hardness, these plates enable 15-20% weight reduction versus S355J2, optimizing designs under Eurocode 3 (EN 1993-1-1) for buckling or DNV-OS-B101 for offshore fatigue. Ideal for monopile foundations in North Sea wind farms or seismic girders in alpine regions, S355ML's structural integrity shines in cold, dynamic loads.
Gangsteel not only supplies S355ML plates but also customizes them with plasma cutting (±0.5 mm tolerance), beveling (V/X/K grooves), drilling (up to 150 mm dia.), rolling (min ID 500 mm), and priming (C5M 200 µm DFT), all while maintaining traceability. Our en 10025 4 High Strength Structural Steel series includes complementary grades for hybrid builds. For a foundational breakdown, consult S355ML Meaning EN 10025-4 Structural Steel Supplier. With fast 3–7 day delivery to 90+ countries, Gangsteel ensures your TMCP structural needs are met efficiently and economically.
S355ML plates under EN 10025-4:2004 (2019) represent a pinnacle of TMCP structural steel engineering, where the grade's designation—"S" for structural, "355" for nominal yield strength (355 MPa ≤16 mm transverse), "M" for thermomechanical processing, and "L" for low-temperature impact (≥27 J at –50 °C longitudinal)—encapsulates its role in load-bearing applications requiring robustness and resilience. TMCP, the "M" hallmark, integrates deformation control during rolling with tailored cooling rates (20-40 °C/s post-900-1100 °C austenitization), forging a fine ferrite-bainite matrix without normalization, yielding superior isotropy and reduced residual stresses (<100 MPa) compared to hot-rolled S355J2 (EN 10025-2).
This process refines grains to ASTM 8-10 sizes via microalloying (Nb ≤0.05%, V ≤0.10%, Ti ≤0.05%), enhancing elongation (≥22%) and fracture toughness (KIc >140 MPa√m at –40 °C), while CEV ≤0.39 minimizes weld preheat (none to 80 mm, 70-120 °C thicker per EN ISO 13916). Density 7.85 g/cm³ and hardness 140-180 HBW facilitate accurate FEA for inertia (I = bh³/12) and machinability (0.2-0.3 mm/rev feeds). S355ML's structural meaning shines in Eurocode 3 fatigue (S-N >10^7 cycles at 160 MPa stress ratio R=0.1) and DNV-OS-B101 offshore, where –50 °C KV prevents cleavage (ductile ≥50% fibrous area per EN ISO 148-1).
In practice, S355ML plates support 15-25% thinner sections than S355J2, cutting mass for transport (e.g., 20% savings in monopile logistics) and installation, aligning with EU Green Deal sustainability. Gangsteel verifies properties with spectrographic analysis and KV sub-size testing (>40 mm thick), providing data for CTOD (>0.4 mm) in fracture mechanics. For chemical underpinnings, see S355ML Chemical Composition EN 10025-4 Supplier; for full mechanical data, S355ML Mechanical Properties EN 10025-4 Plate Supplier.
|
Element |
Ladle Max (%) |
Product Deviation (%) |
Typical Actual (%) – Gangsteel Stock |
Role in Structural Properties |
|---|---|---|---|---|
|
C |
0.14 |
+0.02 |
0.09–0.12 |
Low C for "M" TMCP weld ductility |
|
Si |
0.50 |
+0.05 |
0.20–0.40 |
Deoxidizer for stable ferrite |
|
Mn |
1.60 |
+0.10 |
1.20–1.50 |
"355" yield strengthener |
|
P |
0.025 |
+0.005 |
≤0.018 |
Min P for "L" low-temp cohesion |
|
S |
0.020 |
+0.005 |
≤0.015 |
Low S for inclusion-free "fine-grain" |
|
Nb |
0.05 |
+0.01 |
0.02–0.04 |
Pins grains for TMCP isotropy |
|
V |
0.10 |
+0.02 |
0.04–0.08 |
Precipitation for fatigue |
|
Al min |
0.020 |
+0.030 (total) |
0.025–0.045 |
Deoxidizes for clean matrix |
|
Ti |
0.05 |
+0.03 |
0.01–0.03 |
Nitride pinning for toughness |
|
Cr |
0.30 |
+0.05 |
0.10–0.25 |
Controlled hardenability |
|
Ni |
0.50 |
+0.05 |
0.20–0.40 |
"L" sub-zero transition aid |
|
Mo |
0.10 |
+0.03 |
≤0.05 |
HAZ stability |
|
Cu |
0.55 |
+0.03 |
0.20–0.35 |
Deoxidizer; minor corrosion |
|
N |
0.015 |
+0.003 |
≤0.012 |
Low for nitride-free properties |
|
CEV max |
0.39 |
N/A |
0.32–0.38 |
Weld index for structural integrity |
CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15. Equivs match. Full: S355ML Chemical Composition EN 10025-4 Supplier.
|
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.
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; vs S355M, –50 °C KV; vs S275ML, 30% stronger; vs S420ML, ductility. See S355M vs S355ML EN 10025-4 Steel Plate Comparison Supplier.
Properties equivs.
|
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.
Properties for Eurocode 3, 18% less steel.
Notes: Interpass 150°C; ER50-2. FEA properties input, 2% hardening. Eco: 97% recycle, 20% CO2 save. Gangsteel V-50°, UT S4. For weld properties, see S355ML/NL Weldability EN 10025-4 Fine Grain Supplier.
To 92+ countries: Rotterdam 7 days. For data sheets, S355ML Data Sheet EN 10025-4 Steel Properties Supplier.
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.
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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