S355ML Yield Strength EN 10025-4 Properties Supplier

 

 

S355ML Yield Strength EN 10025-4 Properties Supplier

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.

 

What is S355ML Yield Strength EN 10025-4 Properties?

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.

 

Chemical Composition – Ladle and Product Analysis Combined

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.

 

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

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.

 

Comparison Within the Standard

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.

 

Equivalent International Grades

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.

 

Applications & Design Considerations for S355ML Yield Strength

Yield for Eurocode 3, 18% less steel.

• Offshore: Foundations, yield vs buckling; fatigue 10^8 cycles 140 MPa DNV-RP-C203.
• Cold Bridges: Girders, Z35 tears; HIC Class 1.
• Pipes: Penstocks, 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 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.

 

Why Choose Gangsteel for S355ML Yield Strength

• 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. For specs, S355ML Specification EN 10025-4 Steel Plate Supplier; comparison S355ML vs S355J2 EN 10025-4 Strength Comparison Supplier.

 

FAQ

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.

 

Contact Gangsteel

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Email: admin@gangsteel.com WhatsApp/WeChat/Mobile: +86 135 9887 916

 

 

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