S355ML Impact Test EN 10025-4 Low Temp Supplier

 

 

S355ML Impact Test EN 10025-4 Low Temp Supplier

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.

 

What is S355ML Impact Test EN 10025-4 Low Temp 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.

 

Chemical Composition – Ladle and Product Analysis Combined

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.

 

Mechanical Properties – Full Thickness Range up to 200 mm (Transverse)

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.

 

Comparison Within the Standard

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.

 

Equivalent International Grades

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.

 

Applications & Design Considerations for S355ML Impact Test

–50 °C KV for brittle prevention; Eurocode 3, 18% less steel.

• Offshore: Jackets, KV vs. wave impact; fatigue 10^8 cycles 140 MPa DNV-RP-C203.
• Cold Pipes: Penstocks, Z35 tears; HIC Class 1.
• Bridges: Girders, A5 3% drifts EN 1998-1; C4M <0.08 mm/yr epoxy.
• Fab: Booms, 3t radius; 55 yr ICCP.

Notes: Interpass 150°C; ER50-2. FEA KV-derived CTOD >0.4 mm. Eco: 97% recycle, 20% CO2 save. Gangsteel V-50°, UT S4.

 

Why Choose Gangsteel for S355ML Impact Test Plates

• 5,000+ t stock.
• Mill-direct 70-120 USD/t save; >700 MT tiers.
• Process: laser ±0.4 mm, X-bevel, 140 mm bore, 500 mm roll, C5I 180 µm.
• Cert: ISO 9001/14001, NACE sour, EN 1090 EXC4.
• Legacy: Siemens 1,000+ t (Hornsea), Total (Ichthys)—OTIF 100%.

To 92+ countries: Rotterdam 7 days.

 

FAQ

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.

 

Contact Gangsteel

For S355ML impact plates, quote now.

Email: admin@gangsteel.com WhatsApp/WeChat/Mobile: +86 135 9887 9167 Website: https://gangsteel.net/

Gangsteel—Impact Tested, Project Proven.

 

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