EN 10025-4 S420M TMCP Structural Steel Plate supplier

EN 10025-4 S420M TMCP Structural Steel Plate

Gangsteel – China's Leading Mill-Direct Supplier & Exporter of EN 10025-4 S420M Thermomechanically Rolled Weldable Fine Grain Structural Steel Plates

As a trusted Chinese steel exporter, Gangsteel delivers top-grade en 10025 4 s420m steel plate directly from our expansive 15,000+ ton stockyard. EN 10025-4 S420M is a robust high-strength, fine-grain structural steel fabricated via TMCP (Thermomechanical Controlled Processing), providing a minimum yield strength of 420 MPa and reliable weldability. Offered in thicknesses 6–200 mm, widths up to 4200 mm, and lengths to 18 m, our plates originate from vetted mills like HBIS and Baosteel, featuring full PED/CE compliance (2014/68/EU) and EN 10204-3.1/3.2 test certificates. Third-party audits by DNV, ABS, Lloyd’s, BV, or TÜV confirm suitability for international standards.

What is EN 10025-4 S420M TMCP Structural Steel Plate?

EN 10025-4 S420M is a thermomechanically rolled (TMCP) weldable fine-grain structural steel governed by the European EN 10025-4:2004 standard (updated 2019), tailored for elevated-strength needs in moderate climates. The "S" stands for structural, "420" for the baseline yield strength in MPa, "M" for thermomechanical delivery, and no "L" suffix means standard impact at -20°C (≥40J Charpy V-notch). Employing TMCP—precise hot deformation followed by controlled cooling—S420M develops a fine acicular ferrite structure, granting 15–25% superior load-bearing over S355 or S275 grades and facilitating 15–20% slimmer profiles for cost-efficient builds.

Standout features encompass reduced carbon equivalent (CEV ≤ 0.43) enabling preheating-free welding to 80 mm thick, robust heat-affected zone (HAZ) integrity against cracking, and optional Z-direction enhancement (Z25/Z35) to counter splitting in loaded joints. Distinct from normalized counterparts (EN 10025-3 S420N), S420M's TMCP minimizes internal stresses and boosts uniformity, suiting dynamic-load scenarios. It adheres to Eurocode 3 and ISO 12944 for corrosion, driving applications from industrial cranes to highway bridges. Gangsteel emphasizes S420M availability (key sizes 15–100 mm thick) for swift 3–7 day fulfillment, backing ventures like European rail networks and Asian shipyards.

Chemical Composition (Ladle Analysis, % max unless noted)

S420M's formulation balances low-carbon base with microalloying for grain control, yielding low CEV to safeguard weld toughness and segregation-free homogeneity. Aligns with EN 10025-4 limits.

*CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; usual measured CEV 0.36–0.41 for prime weld performance. Nb/V/Ti refine grains to ASTM 8–10, enhancing -20°C ductility. For low-temp upgrade, consider en 10025 4 s420ml steel plate. Vacuum treatment optional for S <0.008%.

Mechanical Properties (Transverse Testing)

S420M's TMCP fosters a tough, ductile matrix with bainitic undertones, ensuring stable yield and KV across sections. Transverse assured; longitudinal typically 5–8% stronger.

Vickers hardness: 150–200 HV10. Toughness CTOD >0.5 mm at -10°C. Endurance limit: 240 MPa (5×10^6 cycles, R=0.1). Full UT EN 10160 S2/E2; HSD per EN 10228 if specified. S420ML variant shifts KV to -50°C ≥27J.

Equivalent International Grades

S420M equivalents streamline multi-standard projects, with TMCP edge in fabrication ease.

Alert: Verify for exact KV; S420M suits -20°C zones. Related: en 10025 4 s355m steel plate for moderate strength.

Applications & Design Considerations for S420M

S420M's balanced profile optimizes Eurocode 3 stability, trimming material by 18% vs. S355JR in compression members while retaining margin against buckling. Prime domains:

• Machinery & Lifting: Excavator buckets, overhead cranes (500–800 t spans)—high Rm aids overload tolerance.
• Civil Works: Railway girders, stadium roofs; fatigue per EN 1993-1-9 > S355 (Δσ=220 MPa).
• Energy Sector: Hydro penstocks, solar tracker bases—low CEV ensures leak-tight girth welds.
• Fabrication Shops: Pressure ducts, storage silos; Z25 prevents edge cracks in rolled sections.

Pro tips: Employ matching E42xx wires; cap heat input at 3.5 kJ/cm for HAZ preservation. Cold form radius 3.5t; preheat 50–100°C for t>40 mm. Eco-profile: 95% recyclable, 25% less embodied carbon than normalized via TMCP efficiency. Gangsteel supplies milled edges (parallelism <1 mm) and pre-drilled patterns for bolt-on assemblies.

Why Choose Gangsteel for Your S420M Needs

Gangsteel excels in S420M fulfillment:

• Robust Stocking: 1,500+ tons on-hand—85% requests met in 4–6 days.
• Value Pricing: Direct-mill savings 40–110 USD/ton, plus bulk incentives over 150 MT.
• Processing Suite: Laser/plasma cuts (±0.8 mm), countersinking (to 80 mm), dishing (up to 2 m dia.), and C5M painting (150 µm DFT).
• Compliance Edge: EN 1090 EXC3, ABS Type Approval, and HIC-resistant per EEMUA 158.
• Proven Delivery: Fueled Liebherr cranes, Vinci viaducts, and POSCO fabs—flawless execution annually.

Global shipping to 85+ markets: Genoa (9 days), Mumbai (11 days), or LA (15 days) via flexible terms.

Top Exported EN 10025-4 Grades: Real-Time Stock Insights

Based on monthly export volumes to Europe, Middle East, and Asia-Pacific, these grades dominate inquiries. Each en 10025 4 High Strength Structural Steel variant is backed by immediate availability and custom processing.

1. en 10025 4 s355ml steel plate – Global bestseller for -50°C toughness in wind energy.
2. en 10025 4 s460ml steel plate – High-strength leader for offshore oil & gas.
3. en 10025 4 s355m steel plate – Versatile workhorse for bridges and buildings.
4. en 10025 4 s460m steel plate – Preferred for heavy machinery upgrades.
5. en 10025 4 s420ml steel plate – Essential for jack-up platforms and cranes.
6. en 10025 4 s420m steel plate – Reliable for high-load industrial frames.
7. en 10025 4 s275ml steel plate – Go-to for cost-effective low-temp projects.
8. en 10025 4 s275m steel plate – Entry-level high-strength option.

Explore full specs, current pricing, and stock levels via our dedicated pages above.

FAQ

Q1: In what ways does S420M vary from S420ML?

A: Solely in toughness threshold: S420M delivers ≥40J at -20°C, S420ML at -50°C (≥27J) for colder ops. Shared yield, elongation, and composition—opt ML for below -20°C per DNVGL-OS-C101.

Q2: Must S420M be preheated prior to welding?

A: Not typically; CEV ≤0.43 supports no-preheat up to 60 mm with E7016 rods. For thicker/restrained, 80–140°C per AWS D1.1. Batch CET values supplied for tailored procedures.

Q3: Can S420M serve pressure applications?

A: Yes—PED Category II for static vessels via EN 12952. Account for thickness derating; MT/PT NDT per EN 10228-2 for seam integrity.

Q4: S420M vs. S355M price differential?

A: 90–160 USD/ton markup, counterbalanced by 15–20% less volume needs. Spot FOB Qingdao: ~780–880 USD/ton (25 mm, current mill).

Q5: Z-quality availability for S420M?

A: Routine Z25 (≥25% RA); Z35 (≥35%) stocked for high-tension like flange welds. EN 10164 Class 2 certified.

Q6: S420M equivalence to A709 Gr.50?

A: Strong parallel in yield (420 vs. 345 MPa base, upgradable); S420M's TMCP betters weld uniformity. Suits AISC 360 with LT add-ons.

Q7: Processing turnaround for S420M?

A: Stock mill: 3–5 days. Custom (cut/drill/prime): 4–7 days. New roll: 4–6 weeks; expedited sea/air hybrids.

Contact Gangsteel for Competitive Quotes & Fast Shipment

Partner with Gangsteel for seamless EN 10025-4 S420M procurement.

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

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