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| Property | Parameter | Description |
|---|---|---|
| Product Name | High Strength Low Alloy Steel Plates (HSLA) | Structural steel plates with enhanced mechanical properties through micro-alloying elements |
| Material Grade | ASTM A572 Gr.50/60/65, A588, A656; EN S355ML, S420ML, S460ML; GB Q355B/C/D, Q420C | International equivalent grades available; micro-alloyed with Nb, V, Ti for grain refinement |
| Standard Compliance | ASTM A572, ASTM A588, ASTM A656, EN 10025-4, EN 10149-2, GB/T 1591, JIS G3106 SM570 | Compliant with major international structural and pressure vessel standards |
| Chemical Composition – Carbon (C) | ≤ 0.23% max | Low carbon content ensures good weldability and toughness |
| Chemical Composition – Manganese (Mn) | 0.80% – 1.65% | Primary strengthening element; improves hardenability |
| Chemical Composition – Silicon (Si) | ≤ 0.45% max | Deoxidizer; contributes to strength and corrosion resistance |
| Chemical Composition – Phosphorus (P) / Sulfur (S) | P ≤ 0.035%, S ≤ 0.035% | Controlled to minimize brittleness and hot cracking |
| Chemical Composition – Micro-alloys (Nb/V/Ti) | Nb ≤ 0.05%, V ≤ 0.15%, Ti ≤ 0.05% | Grain-refining and precipitation-hardening elements for high strength |
| Tensile Strength | 450 – 760 MPa (65 – 110 ksi) | Per ASTM A572 Gr.50: 450 MPa min; Gr.65: 550 MPa min; EN S460ML: 540–720 MPa |
| Yield Strength | 345 – 550 MPa (50 – 80 ksi) | Per ASTM A572 Gr.50: 345 MPa min; Gr.65: 450 MPa min; EN S460ML: 460 MPa min (t ≤ 16 mm) |
| Elongation | 17% – 23% (in 200 mm gauge length) | ASTM A572 Gr.50: ≥ 21%; EN S355ML: ≥ 20%; higher elongation grades available for forming |
| Impact Toughness | 27 J min at –20°C to –50°C (Charpy V-notch) | EN 10025-4 ML grades guarantee low-temperature toughness; suitable for cold-climate structures |
| Plate Dimensions | Thickness: 3 – 150 mm; Width: 1000 – 4500 mm; Length: 3000 – 18000 mm | Custom cutting available; tolerance per EN 10029 Class B or ASTM A6/A6M |
| Surface Finish | Hot-rolled (HR), Normalized (N), Thermo-Mechanically Controlled Process (TMCP) | Shot-blasted to Sa 2.5 available on request; mill scale or primer-coated options |
| Application | Bridges, offshore platforms, construction machinery, pressure vessels, shipbuilding, wind towers | Ideal where weight reduction and high strength-to-weight ratio are critical |
| Certification | Mill Test Certificate (EN 10204 3.1/3.2), ABS, BV, DNV, Lloyd's, CE Marking | Third-party inspection by SGS, TÜV, or Bureau Veritas available upon request |
| Packaging | Bundled with steel strapping; wooden dunnage; seaworthy export packing | Rust-preventive oil coating or VCI film wrapping for overseas shipment |
| MOQ | 5 metric tons per grade/size | Stock plates available for immediate delivery; custom rolling lead time 15–30 days |
Initial documentation gap on EN equivalent certs — resolved satisfactorily
Our first order of 15 tons of ASTM A572 Grade 50, 30 mm thick, for rail infrastructure support structures hit a snag when the initial shipment lacked the EN 10025-2 S355 equivalent certification our project engineer required for UK regulatory submission. We flagged this within 24 hours of receiving documents. The supplier issued the correct dual-standard certification within two business days, and the material itself — tensile strength 468 MPa, elongation 21.5% — was fully compliant. Issue was resolved without impact to our project timeline. Recommend clarifying documentation requirements upfront.
Our first order of 15 tons of ASTM A572 Grade 50, 30 mm thick, for rail infrastructure support structures hit a snag when the initial shipment lacked the EN 10025-2 S355 equivalent certification our project engineer required for UK regulatory submission. We flagged this within 24 hours of receiving documents. The supplier issued the correct dual-standard certification within two business days, and the material itself — tensile strength 468 MPa, elongation 21.5% — was fully compliant. Issue was resolved without impact to our project timeline. Recommend clarifying documentation requirements upfront.
