St52-3 is a structural steel grade commonly used in Europe, defined by the DIN 17100 standard. It is known for its good mechanical properties and weldability, making it suitable for structural applications. Here are the key properties of St52-3 steel:
1. Chemical Composition (Typical Values)
- Carbon (C): ≤ 0.20%
- Manganese (Mn): 1.00–1.60%
- Phosphorus (P): ≤ 0.040%
- Sulfur (S): ≤ 0.040%
- Silicon (Si): ≤ 0.55%
2. Mechanical Properties:
- Yield Strength (ReH): ≥ 355 MPa
- Tensile Strength (Rm): 510–680 MPa
- Elongation at Break (A): ≥ 20% (for thickness ≤ 16 mm)
- Impact Toughness (Charpy V-Notch): ≥ 27 J at -20°C
3. Applications
St52-3 is widely used in structural and engineering applications, such as:
In the construction industry, ST52-3 steel sheet is commonly used for the fabrication of structural components such as beams, columns, and bridges. Its excellent tensile strength ensures the stability and durability of these structures.
ST52-3 steel sheet is also utilized in the automotive industry for manufacturing parts that require strength and impact resistance, such as chassis components, suspension systems, and body panels. Its ability to withstand dynamic forces makes it ideal for these applications.
Additionally, ST52-3 steel sheet is employed in the machinery and equipment sector. It is used to produce components for heavy machinery, agricultural equipment, and mining machinery where high load-bearing capacity and toughness are essential.
The energy sector benefits from ST52-3 steel sheet in applications such as offshore structures, pipelines, and power transmission towers. Its corrosion resistance and structural integrity make it suitable for withstanding harsh environments.
4. Weldability
St52-3 has good weldability, making it suitable for welded structures. Preheating and post-weld heat treatment may be required for thicker sections or specific applications.
5. Equivalent Grades
- EN 10025-2: S355JR
- ASTM: Similar to A572 Grade 50 (but not identical)
- ISO: Fe510D
6. Additional Notes
- The "St" in St52-3 stands for "structural steel."
- The "52" indicates the minimum yield strength in kgf/mm² (approximately 355 MPa).
- The "3" refers to the impact toughness at low temperatures (-20°C).
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| Other steel plate | ||||
| Name | Material | Specification (mm) | Tons | Remark |
| Low Alloy | Q345A, Q345B, Q345C, Q345D, Q345E, Q390, Q420, Q460C, ST52-3, S355J2+N, SS400, SA302GrC, S275NL, 35CrMo | 6 - 350 | 5788.56 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| Pressure Vessel Plate | Q245R, Q345R, Q370R, 16MnDR, 09MnNiDR, 15CrMoR, 14Cr1MoR, 12Cr2Mo1R, SA516Gr60, SA516Gr70, SA516Gr485, SA285, SA387Gr11, SA387Gr12, SA387Gr22, P265,P295,P355GH,Q245R(R-HIC),Q345R(R-HIC) | 3 - 300 | 8650 | Normalizing, tempered ,controlled rolling, hot rolling , Hot rolling,1st inspection, 2nd inspection, 3rd inspection |
| High-Strength Plate | WH785D/E,Q960D/E, Q890D/E,WH60D/E,WH70B,Q550D,Q590D,Q690D/E | 8 - 120 | 3086.352 | Quenched and tempered |
| Wear-Resistant Plate | NM360, NM400, NM450, NM500 | 6 - 150 | 3866.297 | Quenched and tempered |
| Bridge Plate | Q235qC, Q345qC, Q370qC, Q420qC, Q345qDNH, Q370qDNH, A709 - 50F - 2, A709 - 50T - 2 | 8 - 200 | 2853.621 | Hot rolling, normalized ,hot rolling controlled rolling, quenched and tempered + toughness and brittleness |
