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Gangsteel – China's Leading Mill-Direct Supplier & Exporter of EN10025-4 S355ML Thermomechanical Plates
Gangsteel is your trusted U.S.-focused supplier for EN10025-4 S355ML thermomechanical plates, with extensive stock and rapid delivery to meet American project timelines. As a TMCP (thermomechanical controlled process) weldable fine-grain structural steel under EN 10025-4:2004 (2019 revision), S355ML offers 355 MPa minimum yield strength, excellent low-temperature toughness (≥27 J at –50 °C longitudinal), and superior weldability (CEV ≤0.39, no preheat up to 80 mm). We maintain over 5,000 tons of S355ML plates in thicknesses 6–200 mm, widths 1500–4200 mm, and lengths up to 18 meters, produced by top mills like HBIS and Shougang with full PED 2014/68/EU and CPR 305/2011 certification. Each plate includes EN 10204-3.1/3.2 MTCs, 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—hot rolling at 900-1100 °C with 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, S355ML enables 15-20% weight reduction versus S355J2, ideal for U.S. offshore wind (BOEM-compliant) or bridge retrofits (AASHTO). Gangsteel supports dual-certification (EN + ASTM A572 Gr.50 equiv) for seamless U.S. integration. Fast 7–12 day delivery to Houston, Los Angeles, or New York. Full processing: plasma cutting (±0.4 mm), beveling, drilling, rolling, priming. Explore our en 10025 4 High Strength Structural Steel series. For designation, S355ML Meaning EN 10025-4 Structural Steel Supplier.
EN10025-4 S355ML is a thermomechanically rolled (TMCP) weldable fine-grain structural steel, where "S" denotes structural use, "355" nominal yield 355 MPa (≤16 mm transverse), "M" TMCP delivery, and "L" enhanced Charpy V-notch ≥27 J at –50 °C longitudinally per EN ISO 148-1. TMCP integrates controlled deformation and cooling to achieve properties without normalization, yielding low residual stress (<100 MPa), better flatness (<3 mm/m), and superior HAZ toughness.
Microalloying (Nb ≤0.05%, V ≤0.10%, Ti ≤0.05%) pins grains for ASTM 8-10 size, with CEV ≤0.39 for preheat-free welding to 80 mm. Properties include density 7.85 g/cm³ for mass calc, hardness 140-180 HBW for machining, and KIc >140 MPa√m at –40 °C for fracture. In U.S. contexts, S355ML aligns with A572 Gr.50 + Z35 + –50 °C KV, supporting AASHTO or AISC 360 with supplements. Gangsteel verifies TMCP via microstructure analysis. For chemical, S355ML Chemical Composition EN 10025-4 Supplier; mechanical, S355ML Mechanical Properties EN 10025-4 Plate Supplier.
|
Element |
Ladle Max (%) |
Product Deviation (%) |
Typical Actual (%) – Gangsteel Stock |
Role in TMCP Properties |
|---|---|---|---|---|
|
C |
0.14 |
+0.02 |
0.09–0.12 |
Low C for TMCP weld HAZ |
|
Si |
0.50 |
+0.05 |
0.20–0.40 |
Deoxidizer for ferrite |
|
Mn |
1.60 |
+0.10 |
1.20–1.50 |
Yield strengthener |
|
P |
0.025 |
+0.005 |
≤0.018 |
Min P for toughness |
|
S |
0.020 |
+0.005 |
≤0.015 |
Low S for inclusion-free |
|
Nb |
0.05 |
+0.01 |
0.02–0.04 |
Pins grains in TMCP |
|
V |
0.10 |
+0.02 |
0.04–0.08 |
Precipitation for Rm |
|
Al min |
0.020 |
+0.030 (total) |
0.025–0.045 |
Deoxidizer for clean matrix |
|
Ti |
0.05 |
+0.03 |
0.01–0.03 |
Nitride for isotropy |
|
Cr |
0.30 |
+0.05 |
0.10–0.25 |
Controlled hardenability |
|
Ni |
0.50 |
+0.05 |
0.20–0.40 |
–50 °C transition |
|
Mo |
0.10 |
+0.03 |
≤0.05 |
HAZ stability |
|
Cu |
0.55 |
+0.03 |
0.20–0.35 |
Deoxidizer |
|
N |
0.015 |
+0.003 |
≤0.012 |
Low for properties |
|
CEV max |
0.39 |
N/A |
0.32–0.38 |
TMCP weld index |
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 TMCP 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 TMCP balanced; vs S355M, –50 °C KV; vs S275ML, 30% stronger; vs S420ML, ductility. See S355M vs S355ML EN 10025-4 Steel Plate Comparison Supplier.
TMCP equivs.
|
Standard |
Equivalent Grade |
Key Match Notes |
Typical Use Case |
|---|---|---|---|
|
ASTM/ASME |
A572 Gr.50 + Z35 |
Yield 345 MPa; TMCP –50 °C |
U.S. TMCP bridges |
|
JIS G 3106 |
SM490A |
Rm 490 MPa; ductility TMCP |
Japanese TMCP marine |
|
GB/T 1591 |
Q355E |
Low-temp TMCP |
China-EN TMCP |
|
API 2W |
Grade 50 |
Offshore TMCP |
TMCP platforms |
|
EN 10025-6 |
S355QL |
QT TMCP; S355ML cheaper |
Heavy TMCP loads |
Indicative; TMCP better HAZ. Dual-cert. Full: S355ML Equivalent Material EN 10025-4 Plate Supplier.
TMCP for Eurocode 3, 18% less steel.
Notes: Interpass 150°C; ER50-2. FEA TMCP properties, 2% hardening. Eco: 97% recycle, 20% CO2 save. Gangsteel V-50°, UT S4. For weld, S355ML/NL Weldability EN 10025-4 Fine Grain Supplier; data S355ML Data Sheet EN 10025-4 Steel Properties Supplier.
To U.S.: Houston 10 days. For specs, S355ML Specification EN 10025-4 Steel Plate Supplier; comparison S355ML vs S355J2 EN 10025-4 Strength Comparison Supplier.
Q1: S355ML vs S355M 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 TMCP MTCs.
Q2: Welding preheat for S355ML TMCP?
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 TMCP?
A: Yes, PED III (EN 13445); derate >63 mm. UT S3/E3; RT opt seams. TMCP aids fracture (KIc >140 MPa√m); cost-effective vs QT; dual ASME/EN.
Q4: S355ML vs S355J2 price TMCP?
A: +100-140 USD/t for TMCP/-50 °C; offset 15-20% thinner + 25% fatigue. FOB 700-800 USD/t (25 mm); vol 10-15% discount.
Q5: Z35 in S355ML TMCP?
A: Z25 std; Z35 stocked (≥35% RA EN 10164 Cl.3) tension; +15-25 USD/t. TMCP Norsok M-120 welds; density neutral.
Q6: ASTM equiv for S355ML TMCP?
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 TMCP?
A: Stock 1-3 days; processed 2-5 days; mill 3-5 weeks. 95% OTIF; air <10 MT 24-48 hrs; TMCP verified MTC.
For S355ML TMCP plates, quote now.
Email: admin@gangsteel.com WhatsApp/WeChat/Mobile: +86 135 9887 9167 Website: https://gangsteel.net/
Gangsteel—TMCP Excellence, U.S. Ready.
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