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Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355ML Yield Strength EN 10025-4 Steel Plates
Gangsteel is the expert supplier for S355ML yield strength EN 10025-4 steel plates, offering plates with guaranteed minimum yield strength of 355 MPa and full property verification to support precise structural calculations and compliance worldwide.
As a thermomechanically rolled (TMCP) weldable fine-grain structural steel under EN 10025-4:2004 (2019 revision), S355ML's yield strength—starting at 355 MPa for thicknesses ≤16 mm and progressively derating to 285 MPa at 150-200 mm—enables high-load efficiency in applications like offshore wind foundations and seismic bridges.
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 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 confirming yield strength and other properties, third-party inspections from DNV-GL, ABS, Lloyd's Register, Bureau Veritas, CCS, RINA, KR, TÜV, or SGS, Z25/Z35 through-thickness, and 100% UT EN 10160 S2/E2 testing.
Yield strength (ReH) is the cornerstone property of S355ML, defining its elastic limit under tension and guiding design allowable stresses in Eurocode 3 (EN 1993-1-1), where it supports buckling reduction factors (χ) up to 15-20% better than S355J2 due to TMCP's refined microstructure. At 7.85 g/cm³ density and 140-180 HBW hardness, S355ML facilitates accurate FEA for deflection (δ = PL³/3EI) and fatigue (S-N >10^7 cycles at 160 MPa). Gangsteel verifies yield via tensile testing per EN ISO 6892-1, with actual values often 10-20% above min. Fast 3–7 day delivery and processing (cutting, beveling, drilling, rolling, priming) ensure efficiency. Explore our en 10025 4 High Strength Structural Steel series. For grade basics, S355ML Meaning EN 10025-4 Structural Steel Supplier.
The yield strength of S355ML under EN 10025-4:2004 (2019) is the 0.2% proof stress (ReH) measured transverse to rolling, minimum 355 MPa for thicknesses ≤16 mm, derating to 285 MPa at 150-200 mm to account for thicker-plate metallurgy. This property, alongside tensile strength (Rm 470-630 MPa), elongation (A5 ≥22%), and low-temperature impact (KV ≥27 J at –50 °C per EN ISO 148-1), defines S355ML as a TMCP weldable fine-grain structural steel—"S" structural, "355" yield benchmark, "M" thermomechanical, "L" low-temp.
TMCP—hot rolling at 900-1100 °C with 20-40 °C/s cooling—leverages microalloying (Nb ≤0.05%, V ≤0.10%, Ti ≤0.05%) to pin grains (ASTM 8-10), achieving this yield via ferrite-bainite without normalization, with CEV ≤0.39 for preheat-free welding to 80 mm. Yield strength governs plastic hinge formation in beams (Mp = fy Zp) and column buckling (Nfcr = π²EI/L²), enabling 15-25% thinner sections than S355J2 under Eurocode 3, where partial factor γM0 = 1.0 applies. Properties include density 7.85 g/cm³ for mass, hardness 140-180 HBW for machining, and KIc >140 MPa√m at –40 °C for fracture.
Gangsteel tests yield per EN ISO 6892-1 (strain rate 10-20%/min), reporting actual ReH 365-395 MPa typical. For chemical supporting yield, S355ML Chemical Composition EN 10025-4 Supplier; full mechanical, S355ML Mechanical Properties EN 10025-4 Plate Supplier.
|
Element |
Ladle Max (%) |
Product Deviation (%) |
Typical Actual (%) – Gangsteel Stock |
Role in Yield Strength |
|---|---|---|---|---|
|
C |
0.14 |
+0.02 |
0.09–0.12 |
Low C boosts yield via solid solution |
|
Si |
0.50 |
+0.05 |
0.20–0.40 |
Deoxidizer; minor yield aid |
|
Mn |
1.60 |
+0.10 |
1.20–1.50 |
Primary yield strengthener |
|
P |
0.025 |
+0.005 |
≤0.018 |
Min P for yield plateau |
|
S |
0.020 |
+0.005 |
≤0.015 |
Low S for uniform yield |
|
Nb |
0.05 |
+0.01 |
0.02–0.04 |
Carbides for yield hardening |
|
V |
0.10 |
+0.02 |
0.04–0.08 |
Precipitation for ReH stability |
|
Al min |
0.020 |
+0.030 (total) |
0.025–0.045 |
Deoxidizes for clean yield matrix |
|
Ti |
0.05 |
+0.03 |
0.01–0.03 |
Nitride for yield isotropy |
|
Cr |
0.30 |
+0.05 |
0.10–0.25 |
Controlled for Rm-yield ratio |
|
Ni |
0.50 |
+0.05 |
0.20–0.40 |
Low-temp yield retention |
|
Mo |
0.10 |
+0.03 |
≤0.05 |
HAZ yield preservation |
|
Cu |
0.55 |
+0.03 |
0.20–0.35 |
Deoxidizer for yield uniformity |
|
N |
0.015 |
+0.003 |
≤0.012 |
Low for yield plateau |
|
CEV max |
0.39 |
N/A |
0.32–0.38 |
Weld index affecting yield in HAZ |
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 yield 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 yield balanced; vs S355M, –50 °C KV; vs S275ML, 30% stronger; vs S420ML, ductility. See S355M vs S355ML EN 10025-4 Steel Plate Comparison Supplier.
Yield equivs.
|
Standard |
Equivalent Grade |
Key Match Notes |
Typical Use Case |
|---|---|---|---|
|
ASTM/ASME |
A572 Gr.50 + Z35 |
Yield 345 MPa; properties align |
U.S. yield calc bridges |
|
JIS G 3106 |
SM490A |
Rm 490 MPa; ductility same |
Japanese yield FEA |
|
GB/T 1591 |
Q355E |
Low-temp yield |
China-EN yield |
|
API 2W |
Grade 50 |
Offshore yield |
Yield platforms |
|
EN 10025-6 |
S355QL |
QT yield; S355ML cheaper |
Heavy yield loads |
Indicative; TMCP yield better HAZ. Dual-cert. Full: S355ML Equivalent Material EN 10025-4 Plate Supplier.
Yield for Eurocode 3, 18% less steel.
Notes: Interpass 150°C; ER50-2. FEA yield input, 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 92+ countries: Rotterdam 7 days. For specs, S355ML Specification EN 10025-4 Steel Plate Supplier; comparison S355ML vs S355J2 EN 10025-4 Strength Comparison Supplier.
Q1: S355ML yield strength exact value?
A: 355 MPa min ≤16 mm, derating to 285 MPa at 150-200 mm (transverse). Actual Gangsteel 365-395 MPa typical; EN ISO 6892-1 tested. Key for Eurocode 3 allowable stress (f_y = ReH/γ_M0, γ_M0=1.0).
Q2: S355ML vs S355M difference?
A: Yield same; impact: S355ML –50 °C ≥27 J for cold (offshore/Arctic); S355M –20 °C ≥40 J for temperate. Chem/elong/density same—ML for < –20 °C (DNV-OS-B101). Gangsteel stocks both with yield MTCs.
Q3: Welding preheat for S355ML yield?
A: None to 80 mm (CEV 0.32-0.38); low-H E7018 H4. Thicker: 70-120 °C (EN ISO 13916). TMCP preserves yield in HAZ; saves 50 °C vs J2; CET per heat WPS.
Q4: S355ML for pressure vessels yield?
A: Yes, PED III (EN 13445); derate >63 mm. UT S3/E3; RT opt seams. Yield aids pressure (σ = P r / t); cost-effective vs QT; dual ASME/EN.
Q5: Z35 in S355ML yield?
A: Z25 std; Z35 stocked (≥35% RA EN 10164 Cl.3) tension; +15-25 USD/t. Yield neutral; Norsok M-120 welds.
Q6: ASTM equiv for S355ML yield?
A: A572 Gr.50 + Z35; yield 345 MPa, properties align –50 °C KV add. A633 Gr.C normalized; TMCP HAZ better yield retention. Dual-cert stocked.
Q7: Custom S355ML lead time yield?
A: Stock 1-3 days; processed 2-5 days; mill 3-5 weeks. 95% OTIF; air <10 MT 24-48 hrs; yield verified MTC.
For S355ML yield plates, quote now.
Email: admin@gangsteel.com WhatsApp/WeChat/Mobile: +86 135 9887 916
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