SHANGHAI RUICHAO INDUSTRIAL
SHANGHAI RUICHAO INDUSTRIAL
Pickled SPHC refers to standard hot-rolled commercial steel (SPHC) that has undergone a chemical “pickling” treatment to remove impurities like scale, rust, and oxides from its surface. This process enhances the steel’s cleanliness, smoothness, and readiness for further processing, such as cold rolling, coating, or painting. Commonly used in automotive components, structural parts, general machinery, and household appliances, pickled SPHC offers improved formability, weldability, and paint adhesion compared to non-pickled hot-rolled steel, making it a cost-effective and versatile material where surface quality and further fabrication are important.
Specification Parameters
| Parameters of Pickled SPHC Steel | |||
| Parameter Category | Specific Parameter | Typical Value / Description | Importance / Effect |
| Base Metal Standard | JIS Grade | SPHC (Hot-rolled Commercial Quality) | Defines a general-purpose grade with guaranteed mechanical properties but no strict chemical composition requirements. |
| Chemical Composition | Carbon (C) | Not strictly specified, but typically ~0.10% max. | Chemistry is not the primary control. The focus is on meeting mechanical properties, so composition can vary. |
| Manganese (Mn) | Not strictly specified. | ||
| Phosphorus (P) | ≤ 0.045% | Impurity limits are set to ensure basic weldability and prevent excessive brittleness. | |
| Sulfur (S) | ≤ 0.045% | ||
| Mechanical Properties (Key Parameters) | Yield Strength (YS) | ≥ 215 MPa (Min. value) | Provides basic resistance to deformation. The actual value can be higher, as only a minimum is specified. |
| Tensile Strength (TS) | 270 MPa ~ 410 MPa | Provides the basic strength for structural applications. A range is specified. | |
| Elongation | ≥ 26% (Min. value for thickness ≤2mm) | Ensures a minimum level of ductility for basic forming like bending. | |
| Surface & Dimensional | Surface Quality | Clean, scale-free, uniform matte finish. | The entire purpose of pickling. Removes all mill scale to provide a uniform surface for painting, plating, or further processing. |
| Thickness Tolerance | Governed by JIS G 3193 standard. | Tolerances are wider than for cold-rolled sheet. | |
| Width | Standard coil widths (e.g., 900mm, 1200mm, 1500mm). | ||
| Key Characteristics | Formability | Fair / Commercial Quality. Suitable for simple bending, moderate forming, and flat parts. | Not suitable for severe deep drawing or stretching. Lacks the controlled chemistry of drawing grades (SPHD/SPHE). |
| Weldability | Good. The relatively low and unspecified carbon content generally allows for easy welding. | A key reason for its use in frames, structures, and general fabrication. | |
