1. Key Properties:
High Strength: ST52-3 offers excellent yield and tensile strength, making it ideal for use in demanding structural and mechanical applications.
Weldability: The steel is highly weldable, ensuring ease of fabrication for complex structural assemblies.
Machinability: It is easy to machine, providing precision in part fabrication while maintaining its strength.
Durability: Offers good resistance to wear and fatigue, which is essential for heavy-duty applications.
Corrosion Resistance: Moderate resistance to atmospheric corrosion, making it suitable for outdoor and industrial environments.
Impact Toughness: Tested for impact resistance, particularly in colder environments (tested to -20°C as per J2 classification).
2. Applications/Industries:
Construction: Used for structural beams, frames, and other load-bearing components in buildings and infrastructure projects.
Automotive: Ideal for manufacturing automotive parts such as axles, shafts, and structural components.
Heavy Machinery: Components like gears, rods, and machinery parts that undergo heavy mechanical stress and require high strength.
Oil & Gas: Used in drilling equipment, pipelines, and components for high-pressure applications in harsh environments.
Hydraulic Systems: Suitable for producing hydraulic cylinders, rods, and other components used in lifting and heavy machinery operations.
Engineering Projects: Versatile for various mechanical applications requiring tough, reliable steel with good fatigue resistance.
3. Certifications/Standards:
DIN 17100: ST52-3 is compliant with the DIN 17100 standard, which defines general structural steels with specific chemical and mechanical properties.
EN 10025: ST52-3 conforms to EN 10025 standards for structural steel with improved strength and durability.
ISO 9001: Certification for quality management systems (depending on manufacturer).
ISO 3834: Welding quality management system for industrial welding.
4. Chemical Composition:
Carbon (C): 0.15-0.20%
Silicon (Si): 0.20-0.40%
Manganese (Mn): 1.20-1.50%
Phosphorus (P): 0.040% max
Sulfur (S): 0.040% max
The chemical composition of ST52-3 ensures a good combination of strength and machinability, making it ideal for structural applications.
5. Technical Specifications:
Yield Strength:
ST52-3: 355 MPa (minimum)
Tensile Strength:
ST52-3: 490–630 MPa
Hardness:
ST52-3: Approximately 170 HB (Brinell hardness)
These technical properties confirm the steel's suitability for high-strength applications in demanding environments, providing a balance between toughness and machinability.