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Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355ML Meaning EN 10025-4 Structural Steel Plates
Gangsteel is the authoritative supplier for S355ML meaning EN 10025-4 structural steel plates, offering in-depth insights into this grade's designation and properties to empower your material selection. As a thermomechanically rolled (TMCP) weldable fine-grain structural steel under EN 10025-4:2004 (2019 revision), S355ML's meaning encapsulates its role in high-strength, low-temperature applications, with a nominal yield of 355 MPa and ≥27 J Charpy V-notch at –50 °C longitudinally. We stock over 5,000 tons of S355ML plates—thicknesses 6–200 mm, widths 1500–4200 mm, lengths up to 18 meters—produced by premium 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 detailing the meaning and compliance, plus third-party inspections from DNV-GL, ABS, Lloyd's Register, Bureau Veritas, CCS, RINA, KR, TÜV, or SGS.
Decoding S355ML's meaning is essential for engineers navigating standards like Eurocode 3 or DNV-OS-B101, where its TMCP delivery ensures superior weldability (CEV ≤0.39, no preheat to 80 mm) and isotropy for fatigue-critical designs. At 7.85 g/cm³ density and 140-180 HBW hardness, S355ML reduces weight 15-20% vs. S355J2, ideal for offshore monopiles or seismic frames. Z25/Z35 through-thickness and 100% UT EN 10160 S2/E2 are standard. Gangsteel demystifies S355ML meaning with precise data, fast delivery (3–7 days globally), and services (cutting, beveling, drilling, rolling, priming). Explore our en 10025 4 High Strength Structural Steel for the full series.
The meaning of S355ML in EN 10025-4:2004 (2019) is a concise code for a thermomechanically rolled (TMCP) weldable fine-grain structural steel optimized for high-strength, low-temperature performance. Breaking down the alphanumeric designation:
Collectively, S355ML's meaning signifies a versatile, cost-effective grade for demanding conditions, balancing yield/tensile (470-630 MPa), ductility (≥22% elongation), and toughness while maintaining CEV ≤0.39 for preheat-free welding up to 80 mm. TMCP's "M" differentiates it from normalized S355NL (EN 10025-3), offering 20-30% less distortion in fabrication and superior HAZ toughness during multi-pass welds. Microalloying (Nb ≤0.05%, V ≤0.10%, Ti ≤0.05%) pins grains to ASTM 8-10 sizes, ensuring the "fine-grain" classification for isotropy.
In context, S355ML's meaning aligns with Eurocode 3 (EN 1993-1-1) for fatigue (S-N curves >10^7 cycles at 160 MPa) and DNV-OS-B101 for offshore, where –50 °C KV prevents cleavage failure (ductile ≥50% fibrous area). Density 7.85 g/cm³ and hardness 140-180 HBW support precise FEA modeling. Gangsteel elucidates S355ML meaning with heat-specific MTCs, aiding compliance in multinational projects. For a quick overview, visit S355ML Meaning EN 10025-4 Structural Steel Supplier—this very page!
S355ML's composition, verified ladle-to-product, underpins its meaning as a weldable low-temp steel.
|
Element |
Ladle Max (%) |
Product Deviation (%) |
Typical Actual (%) – Gangsteel Stock |
Role in S355ML Meaning |
|---|---|---|---|---|
|
C |
0.14 |
+0.02 |
0.09–0.12 |
Low C embodies "weldable" for CEV control |
|
Si |
0.50 |
+0.05 |
0.20–0.40 |
Deoxidizer supporting TMCP "M" stability |
|
Mn |
1.60 |
+0.10 |
1.20–1.50 |
Strengthens to meet "355" yield spec |
|
P |
0.025 |
+0.005 |
≤0.018 |
Min P reinforces "fine-grain" toughness |
|
S |
0.020 |
+0.005 |
≤0.015 |
Low S aids "L" low-temp ductility |
|
Nb |
0.05 |
+0.01 |
0.02–0.04 |
Pins grains for TMCP "M" refinement |
|
V |
0.10 |
+0.02 |
0.04–0.08 |
Boosts precipitation for "structural" durability |
|
Al min |
0.020 |
+0.030 (total) |
0.025–0.045 |
Deoxidizes for clean "fine-grain" matrix |
|
Ti |
0.05 |
+0.03 |
0.01–0.03 |
Nitride former enhancing "L" impact |
|
Cr |
0.30 |
+0.05 |
0.10–0.25 |
Controlled for balanced hardenability |
|
Ni |
0.50 |
+0.05 |
0.20–0.40 |
Improves "L" sub-zero transition |
|
Mo |
0.10 |
+0.03 |
≤0.05 |
Minor for HAZ consistency |
|
Cu |
0.55 |
+0.03 |
0.20–0.35 |
Deoxidizer aiding overall stability |
|
N |
0.015 |
+0.003 |
≤0.012 |
Low for nitride-free toughness |
|
CEV max |
0.39 |
N/A |
0.32–0.38 |
Defines "weldable" core of meaning |
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 meaning in family context.
|
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 "L" for low-temp; vs S355M, –50 °C KV; vs S275ML, 30% stronger; vs S420ML, ductility. See S355M vs S355ML EN 10025-4 Steel Plate Comparison Supplier.
S355ML meaning translates to equivs.
|
Standard |
Equivalent Grade |
Key Match Notes |
Typical Use Case |
|---|---|---|---|
|
ASTM/ASME |
A572 Gr.50 + Z35 |
Yield 345 MPa; –50 °C KV |
U.S. low-temp equiv |
|
JIS G 3106 |
SM490A |
Rm 490 MPa; –40 °C KV |
Japanese structural |
|
GB/T 1591 |
Q355E |
Low-temp exact |
China-EN equiv |
|
API 2W |
Grade 50 |
Offshore KV >27 J |
Low-temp platforms |
|
EN 10025-6 |
S355QL |
QT; S355ML TMCP cheaper |
Heavy equiv |
Indicative; full TMCP meaning better HAZ. Dual-cert. Full: S355ML Equivalent Material EN 10025-4 Plate Supplier.
S355ML meaning: TMCP low-temp structural; Eurocode 3, 18% less steel.
Notes: Interpass 150°C; ER50-2. FEA "M" isotropy, 2% hardening. Eco: 97% recycle, 20% CO2 save. Gangsteel V-50°, UT S4.
To 92+ countries: Rotterdam 7 days.
Q1: What does S355ML mean in EN 10025-4?
A: S = structural, 355 = yield 355 MPa, M = TMCP delivery, L = –50 °C ≥27 J KV. Meaning: weldable fine-grain for low-temp high-strength. Vs S355J2, 15-20% thinner; Gangsteel MTCs detail.
Q2: S355ML vs S355M difference?
A: "L" impact: S355ML –50 °C ≥27 J for cold (offshore/Arctic); S355M –20 °C ≥40 J for temperate. Yield/chem/weld same—ML for < –20 °C (DNV-OS-B101). Gangsteel stocks both with KV reports.
Q3: Welding preheat for S355ML?
A: None to 80 mm (CEV 0.32-0.38); low-H E7018 H4. Thicker: 70-120 °C (EN ISO 13916). "M" TMCP low stress; saves 50 °C vs J2; CET per heat WPS.
Q4: S355ML for pressure vessels?
A: Yes, PED III (EN 13445); derate >63 mm. UT S3/E3; RT opt seams. "L" KV aids fracture; cost-effective vs QT; dual ASME/EN.
Q5: Z35 in S355ML?
A: Z25 std; Z35 stocked (≥35% RA EN 10164 Cl.3) tension; +15-25 USD/t. "S" structural welds Norsok M-120; density neutral.
Q6: ASTM equiv for S355ML meaning?
A: A572 Gr.50 + Z35; yield 345 MPa, –50 °C KV add. A633 Gr.C normalized; TMCP "M" HAZ better. Dual-cert stocked for meaning match.
Q7: Custom S355ML lead time?
A: Stock 1-3 days; processed 2-5 days; mill 3-5 weeks. 95% OTIF; air <10 MT 24-48 hrs; "L" KV verified MTC.
For S355ML meaning plates, quote now.
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