QStE420 Steel Sheets – AUTOMOTIVE STEEL
QStE420 Steel Sheets – AUTOMOTIVE STEEL
QStE420 is a high-strength, low-alloy structural steel widely used in the automotive and construction industries. The name “QStE” indicates that the steel is of high strength (“Q” for “high-quality”), suitable for cold forming (“StE” for “Stahl für Einarbeitung,” meaning “steel for processing” in German), and “420” denotes the minimum yield strength of 420 MPa. QStE420 is known for its excellent formability, weldability, and impact resistance, making it ideal for applications such as car chassis, frames, and other critical structural components.
SteelPro Group delivers QStE420 steel products conforming to DIN EN 10149-2 standards, ensuring superior performance for demanding automotive applications. Our QStE420 steel is available in various forms, including hot rolled coils, cut-to-length sheets, galvanized sheets, and tubular profiles.
Description
What is QStE 420
QStE420 is a high-strength, low-alloy structural steel composed of approximately 98% iron and 2% alloying elements such as carbon, manganese, and silicon. It is typically available in solid, flat, or sheet forms and is usually greyish in color. As a structural steel, QStE420 is known for its high yield strength of at least 420 MPa, good formability, and excellent weldability. It is primarily used in the automotive industry, particularly for car chassis, where strength, impact resistance, and corrosion resistance are essential. The steel is produced through hot rolling, which enhances its mechanical properties. QStE420 can also be categorized based on thickness and specific mechanical requirements.Characteristics of QStE 420 Steel
QStE420 steel is an ideal material for car chassis, ensuring robust structural integrity. It offers good formability, allowing for the manufacturing of complex shapes and components crucial to chassis design. The steel’s excellent weldability facilitates strong and reliable joints during chassis assembly. Additionally, its high-impact resistance provides superior protection in safety-critical situations, enhancing overall vehicle safety. The steel is also often treated or coated for corrosion resistance, helping to withstand harsh environmental conditions and extend the lifespan of the chassis.Chemical Compositions
Element | Composition (max) |
---|---|
Carbon (C) | 0.12% |
Manganese (Mn) | 1.60% |
Phosphorus (P) | 0.025% |
Sulfur (S) | 0.020% |
Silicon (Si) | 0.50% |
Aluminum (Al) | 0.015% (min) |
Physical Properties
Property | Metric | Imperial |
---|---|---|
Density | 7.85 g/cm³ | 0.283 lb/in³ |
Melting Point | 1425-1460°C | 2597-2660°F |
Boiling Point | Not typically specified | Not typically specified |
Thermal Conductivity | 45-55 W/m·K | 26-32 Btu·ft/h·ft²·°F |
Electrical Conductivity | 10-15% IACS | 10-15% IACS |
Specific Heat Capacity | 450-500 J/kg·K | 0.108-0.119 Btu/lb·°F |
Thermal Expansion Coefficient | 11-13 × 10⁻⁶ /°C | 6.1-7.2 × 10⁻⁶ /°F |
Electrical Resistivity | 0.2-0.4 µΩ·m | 0.12-0.24 µΩ·ft |
Mechanical Properties
Property | Metric | Imperial |
---|---|---|
Tensile Strength | 480-620 MPa | 69,600-89,900 psi |
Yield Strength | ≥ 420 MPa | ≥ 60,900 psi |
Brinell Hardness (HB) | 130-180 HB | 130-180 HB |
Rockwell Hardness (HRC) | 20-25 HRC | 20-25 HRC |
Vickers Hardness (HV) | 150-200 HV | 150-200 HV |
Elongation | 15-22% | 15-22% |
Elastic Modulus | 210 GPa | 30,000 ksi |
Industries & Applications
Industry | Products |
Aerospace | Fuselage Structures, Landing Gear |
Automotive | Chassis Components, Suspension Systems |
Construction | Building Frames, Support Beams |
Heavy Machinery | Machine Frames, Hydraulic Components |
Railway | Train Frames, Rail Tracks |
Shipbuilding | Hull Structures, Decks |
Energy Sector | Wind Turbine Towers, Pipeline Supports |
Mining | Conveyor Systems, Crusher Jaws |
Machining
QStE420 Heat Treating Instructions: QStE420 steel is typically processed through controlled rolling rather than quenching and tempering. This controlled rolling enhances its mechanical properties without the need for additional heat treatment.
QStE420 Surface Finish: The surface of QStE420 steel can be treated through various methods, such as hot-dip galvanizing, painting, or powder coating, to improve corrosion resistance and extend durability.
Custom grades can be produced upon request to meet specific requirements.
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SteelPRO Group – manufacturer and solution provider for special steel, offering multi-industry application solutions and customised services, 100% quality free, accompanying customers in their growth!
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