Steel S420ML
📌 Overview and Technical Specifications
Steel S420ML is a thermomechanically strengthened low-alloy structural steel with increased strength, excellent impact toughness, and high weldability. It is designed for operation in low-temperature conditions and under significant mechanical loads.
🛠 Specifications:
- Hardness: 180–250 HB
- Thickness: from 6 mm to 120 mm
- Yield strength: ≥ 420 MPa
- Tensile strength: 520–680 MPa
- Elongation: 15–22%
🧪 Chemical Composition
- Carbon (C): ≤0.18%
- Silicon (Si): ≤0.50%
- Manganese (Mn): 1.00 – 1.80%
- Phosphorus (P): ≤0.025%
- Sulfur (S): ≤0.015%
- Chromium (Cr): ≤0.30%
- Nickel (Ni): ≤0.50%
- Molybdenum (Mo): ≤0.20%
- Vanadium (V): ≤0.10%
- Niobium (Nb): ≤0.05%
⚙ Applications
Steel S420ML is widely used in the following industries:
- 🏗 Construction of bridges and metal structures
- 🚆 Manufacturing of railcars and transportation equipment
- ⚡ Energy infrastructure and wind power industry
- 🏭 Industrial structures and large-scale engineering projects
- 🌉 Hydraulic engineering structures and underwater constructions
🌟 Features
- ✅ High strength at low temperatures
- ✅ Excellent weldability without the need for preheating
- ✅ Outstanding impact toughness, especially at -50°C
- ✅ Optimal balance of strength and ductility
- ✅ Resistance to dynamic and cyclic loads
Forms of delivery of fine-grained structural steel after thermomechanical rolling S420ML EN 10025-4
| Steel grade EN 10025-4 | Steel grade DIN | Dimensions supplied (mm) | ||
| Thickness (mm) | Width (mm) | Length (mm) | ||
| S355ML | 1.8834 | 2–220 | 1,000–4,000 | 16,000 |
| S420ML | 1.8836 | 8–120 | 1,000–3,500 | 16,000 |
| S460ML | 1.8838 | 4–180 | 1000–3500 | 16000 |
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