saph440 STEEL – AUTOMOTIVE STEEL
saph440 STEEL – AUTOMOTIVE STEEL
SAPH440 is a high-strength hot-rolled steel commonly used in the automotive industry for manufacturing chassis components and structural parts. The name “SAPH” stands for “Steel Automotive Press Hot,” indicating that it is specifically designed for automotive applications and is produced through hot rolling. The “440” denotes its minimum tensile strength of 440 MPa, ensuring robust performance in demanding conditions.
Description
What is SAPH440
SAPH440 is a high-strength hot-rolled steel composed of approximately 98-99% iron and 1-2% alloying elements such as carbon, manganese, and silicon. It typically comes in solid sheet or coil forms and has a greyish-metallic appearance. It is primarily used in the automotive industry to manufacture chassis components, body panels, and other structural parts. The steel is processed through hot rolling, which enhances its mechanical properties and makes it suitable for forming complex shapes.Characteristics of SAPH440 Steel
SAPH440 steel is ideal for automotive chassis applications due to its high tensile and yield strength, providing robust structural integrity. It offers superior formability, allowing the creation of complex and intricate parts, and reliable weldability, ensuring strong and durable joints in chassis construction. The steel’s enhanced impact resistance provides excellent protection in safety-critical situations, contributing to overall vehicle safety. Also, SAPH440 is often treated or coated for corrosion resistance, enabling it to withstand harsh environmental conditions and prolong the chassis’s lifespan.Chemical Compositions
| Element | Composition (max) |
|---|---|
| Carbon (C) | 0.20% |
| Manganese (Mn) | 1.50% |
| Phosphorus (P) | 0.040% |
| Sulfur (S) | 0.040% |
| Silicon (Si) | 0.30% |
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 | 440-510 MPa | 63,800-73,950 psi |
| Yield Strength | 275-325 MPa | 39,900-47,150 psi |
| Brinell Hardness (HB) | 130-180 HB | 130-180 HB |
| Rockwell Hardness (HRC) | 15-25 HRC | 15-25 HRC |
| Vickers Hardness (HV) | 140-210 HV | 140-210 HV |
| Elongation | 20-30% | 20-30% |
| Elastic Modulus | 200 GPa | 29,000 ksi |
Industries & Applications
| Industry | Products |
|---|---|
| Agricultural Equipment | Plow Blades, Harvester Frames, Tractor Chassis, Seeding Equipment |
| Appliances | Washing Machine Bodies, Refrigerator Panels, Microwave Casings, Dryer Drums |
| Automotive | Chassis Components, Suspension Parts, Wheel Rims, Body Panels |
| Construction | Structural Beams, Roofing, Wall Panels, Pipes |
| Energy Sector | Wind Turbine Towers, Solar Panel Frames, Oil Pipeline Components, Power Plant Structures |
| Furniture | Metal Cabinets, Shelving Units, Desks, Chairs |
| Heavy Machinery | Excavator Arms, Loader Frames, Crane Booms, Tractor Parts |
| Railway | Train Car Bodies, Rails, Braking Systems, Couplers |
| Shipbuilding | Hull Structures, Decks, Bulkheads, Frames |
Machining
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