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Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355ML Impact Test EN 10025-4 Low Temperature Steel Plates
Gangsteel is the specialized supplier for S355ML impact test EN 10025-4 low temp steel plates, delivering plates that excel in Charpy V-notch testing with guaranteed ≥27 J at –50 °C for critical cold-service applications. With over 5,000 tons of S355ML in permanent stock—thicknesses 6–200 mm, widths 1500–4200 mm, lengths up to 18 meters—we ensure the impact toughness that meets or exceeds EN 10025-4:2004 (2019 revision) requirements. Produced via TMCP by mills like HBIS and Shougang, our plates feature low CEV ≤0.39 for weldability, full PED 2014/68/EU and CPR 305/2011 certification, and EN 10204-3.1/3.2 MTCs verifying impact properties. Third-party testing from DNV-GL, ABS, Lloyd's Register, Bureau Veritas, CCS, RINA, KR, TÜV, or SGS is standard, including optional sub-size KV samples for thick plates.
The S355ML impact test is pivotal for low-temp integrity, preventing brittle fracture in offshore wind towers battered by –50 °C waves or Arctic pipelines under cryogenic loads. At 7.85 g/cm³ density and 140-180 HBW hardness, S355ML balances toughness with weight efficiency, reducing sections 15-20% vs. S355J2. Z25/Z35 through-thickness and 100% UT EN 10160 S2/E2 ensure flaw-free performance. Gangsteel provides impact test reports with every heat, supporting DNV-OS-B101 and Eurocode 3 designs. Browse our en 10025 4 High Strength Structural Steel for series grades. For grade basics, see S355ML Meaning EN 10025-4 Structural Steel Supplier.
The S355ML impact test under EN 10025-4:2004 (2019) evaluates low-temperature toughness via Charpy V-notch (KV) testing, mandating ≥27 J average (longitudinal) at –50 °C for the "L" designation—this distinguishes S355ML as a thermomechanically rolled (TMCP) weldable fine-grain structural steel for harsh environments. "S" signifies structural, "355" nominal yield 355 MPa (≤16 mm), "M" TMCP delivery, and "L" low-temp enhancement.
TMCP—hot rolling at 900-1100 °C with 20-40 °C/s cooling—refines ferrite-bainite grains (ASTM 8-10), achieving this impact via microalloying (Nb/V/Ti pinning) without normalization. Test per EN ISO 148-1: 10x10x55 mm specimen, 2 mm V-notch, pendulum strike at 5.5 m/s; sub-size (7.5x10x55 mm) for >40 mm thick, adjusted energy (20 J min). Failure modes: ductile shear (≥50% fibrous) vs. brittle cleavage, critical for fracture mechanics (KIc >140 MPa√m at –40 °C).
This test ensures S355ML withstands brittle fracture in low-temp service, per Eurocode 3 (EN 1993-1-10) transition temps DBTT < –60 °C. Vs. S355M (–20 °C/40 J), S355ML suits Baltic offshore or Siberian pipes. Gangsteel tests every heat, reporting averages/single values. Density 7.85 g/cm³, hardness 140-180 HBW aid design. Full meaning: S355ML Meaning EN 10025-4 Structural Steel Supplier.
Composition supports impact via low P/S, Al deoxidation.
|
Element |
Ladle Max (%) |
Product Deviation (%) |
Typical Actual (%) – Gangsteel Stock |
Role in Impact Toughness |
|---|---|---|---|---|
|
C |
0.14 |
+0.02 |
0.09–0.12 |
Low reduces hardenability for ductile HAZ |
|
Si |
0.50 |
+0.05 |
0.20–0.40 |
Deoxidizer; stable toughness |
|
Mn |
1.60 |
+0.10 |
1.20–1.50 |
Toughness enhancer without brittleness |
|
P |
0.025 |
+0.005 |
≤0.018 |
Min for grain boundary strength |
|
S |
0.020 |
+0.005 |
≤0.015 |
Low inclusions for cleavage resistance |
|
Nb |
0.05 |
+0.01 |
0.02–0.04 |
Pins grains for finer structure |
|
V |
0.10 |
+0.02 |
0.04–0.08 |
Precipitates boost low-temp energy |
|
Al min |
0.020 |
+0.030 (total) |
0.025–0.045 |
Grain refiner for KV absorption |
|
Ti |
0.05 |
+0.03 |
0.01–0.03 |
Nitride formation aids toughness |
|
Cr |
0.30 |
+0.05 |
0.10–0.25 |
Controlled for balanced hardenability |
|
Ni |
0.50 |
+0.05 |
0.20–0.40 |
Enhances –50 °C ductile transition |
|
Mo |
0.10 |
+0.03 |
≤0.05 |
Minor for HAZ stability |
|
Cu |
0.55 |
+0.03 |
0.20–0.35 |
Deoxidizer; minor toughness aid |
|
N |
0.015 |
+0.003 |
≤0.012 |
Low for clean matrix |
|
CEV max |
0.39 |
N/A |
0.32–0.38 |
Weld key; indirect KV via HAZ |
CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15. Equivs match. Full: S355ML Chemical Composition EN 10025-4 Supplier.
Impact KV longitudinal; transverse ≥80% long.
|
Thickness (mm) |
ReH min (MPa) |
Rm (MPa) |
A5 min (%) |
KV min (J, long. –50 °C) |
|---|---|---|---|---|
|
≤16 |
355 |
470–630 |
22 |
27 (avg 2/3 tests) |
|
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; sub-size for >40 mm. Hardness 140-180 HBW; density 7.85 g/cm³. Curves: S355ML Mechanical Properties EN 10025-4 Plate Supplier.
S355ML impact 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 |
Low-temp offshore |
Cranes |
|
Gangsteel Stock |
High |
V. High |
Highest |
Med |
S355ML > S355M impact for low temp; vs S275ML, 30% stronger; vs S420ML, ductility. See S355M vs S355ML EN 10025-4 Steel Plate Comparison Supplier.
Impact equivs match –50 °C KV.
|
Standard |
Equivalent Grade |
Key Match Notes |
Typical Use Case |
|---|---|---|---|
|
ASTM/ASME |
A633 Gr.C + Z35 |
Normalized; KV –45 °C equiv |
U.S. low-temp tanks |
|
JIS G 3106 |
SM490B |
–40 °C KV; TMCP opt |
Japanese cold pipes |
|
GB/T 1591 |
Q355E |
Exact –50 °C KV |
China low-temp bridges |
|
API 2W |
Grade 50 |
Offshore KV >27 J |
Low-temp platforms |
|
EN 10025-6 |
S355QL1 |
QT; higher KV but costlier |
Heavy low-temp lifts |
Indicative; S355ML TMCP HAZ better. Dual-cert. Full: S355ML Equivalent Material EN 10025-4 Plate Supplier.
–50 °C KV for brittle prevention; Eurocode 3, 18% less steel.
Notes: Interpass 150°C; ER50-2. FEA KV-derived CTOD >0.4 mm. Eco: 97% recycle, 20% CO2 save. Gangsteel V-50°, UT S4.
To 92+ countries: Rotterdam 7 days.
Q1: S355ML impact test details?
A: Charpy V-notch EN ISO 148-1: ≥27 J avg (2/3 tests) at –50 °C long.; sub-size >40 mm (20 J min). Ductile ≥50% fibrous; Gangsteel reports avg/single, sub-size opt.
Q2: S355ML vs S355M difference?
A: Impact temp: S355ML –50 °C ≥27 J for low temp (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 data.
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). Saves 50 °C vs S355J2; CET per heat for WPS, preserves KV.
Q4: S355ML for pressure vessels?
A: Yes, PED III (EN 13445); derate >63 mm. UT S3/E3; RT opt for seams. KV aids fracture assessment; cost-effective vs QT; dual ASME/EN.
Q5: Z35 in S355ML?
A: Z25 std; Z35 stocked (≥35% RA EN 10164 Cl.3) for tension; +15-25 USD/t. Norsok M-120; KV neutral.
Q6: ASTM equiv for S355ML impact?
A: A572 Gr.50 + Z35; –50 °C KV add. A633 Gr.C normalized alt; TMCP HAZ better KV retention. Dual-cert stocked.
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; KV verified MTC.
For S355ML impact plates, quote now.
Email: admin@gangsteel.com WhatsApp/WeChat/Mobile: +86 135 9887 9167 Website: https://gangsteel.net/
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