ST 52-3, Material Number:1.0570 Forged Steels
PRODUCT DESCRIPTION
ST52-3 is a high-strength structural steel with excellent weldability and machinability, commonly used in automotive, construction, and heavy machinery industries.PRODUCT TYPES
- Hot Rolling and Forged Steels between 20 mm and 920 mm
- ST 52-3 Seamless Steel Pipes
- ST 52-3 Steel Sheet
ST52-3 Steel: Overview
ST52-3 is a high-strength structural steel that offers excellent weldability, machinability, and good tensile strength. It is commonly used in the manufacturing of structural components, machines, and bridges. Below is detailed information about ST52-3.
Chemical Composition (in %)
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.22 max |
| Silicon (Si) | 0.55 max |
| Manganese (Mn) | 1.60 max |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.035 max |
| Chromium (Cr) | 0.30 max |
| Nickel (Ni) | 0.30 max |
| Molybdenum (Mo) | 0.15 max |
| Copper (Cu) | 0.50 max |
Mechanical Properties
- Density: 7.85 g/cm³ (or 7850 kg/m³)
- Tensile Strength (Rm): 490–630 MPa
- Yield Strength (Rp0.2): 355 MPa (min)
- Elongation (A): ≥ 22% (for thickness up to 20 mm)
- Hardness (HB): 160–190
Machinability
ST52-3 steel is known for its good machinability. It is suitable for machining into complex parts due to its balanced composition. While it has a moderate carbon content, its manganese content aids in enhancing its hardness and machinability. Machining operations like turning, drilling, and milling can be efficiently performed on ST52-3 with proper tools and parameters.
Tips for Machining:
- Use high-speed steel (HSS) or carbide tools for better performance.
- Maintain moderate cutting speeds to reduce tool wear.
Weldability
ST52-3 steel offers excellent weldability due to its relatively low carbon content and good alloy balance. It can be welded by conventional methods such as MIG, TIG, and arc welding.
Welding Guidelines:
- Preheating is generally not required for sections under 30 mm.
- Use low-hydrogen electrodes for optimal weld quality.
- Post-weld heat treatment may be necessary in thicker sections to avoid cracking.
Usage Areas
ST52-3 is used in industries that require strong, durable, and weldable steel for structural components. Common usage includes:
- Machine Construction: Frames, chassis, and machine parts.
- Automotive Industry: Structural components, suspension parts.
- Bridge Construction: Steel beams and supports.
- Cranes and Lifting Equipment: Heavy-duty structures.
- Pressure Vessels: Components that withstand high pressure.
- Steel Fabrication: Welding and structural fabrication for various applications.
Industries Using ST52-3 Steel
- Construction Industry: Structural beams, columns, and frames for buildings and bridges.
- Automotive Industry: Parts that require high strength-to-weight ratios.
- Machine Building: Components such as gearboxes, shafts, and supports.
- Shipbuilding: Steel frames and hulls of ships.
- Heavy Equipment Manufacturing: Crane arms, structural steel for heavy machinery.
Key Advantages of ST52-3
- High Tensile Strength: Suitable for load-bearing applications.
- Good Weldability: Can be easily welded with various methods.
- Formability: Can be bent and formed into complex shapes.
- Versatility: Used across various industries, including automotive, construction, and heavy machinery.