Suitable for producing ordinary sheet metal structural parts, equipment base plates, mounting plates, brackets, welded parts, protective covers, reinforcement plates, frame parts, and medium- to low-cost industrial sheet metal parts with low appearance requirements.
Hot-rolled sheet metal - SPHC is a sheet metal structural material based on hot-rolled low-carbon steel plates, produced through laser cutting, plasma cutting, punching, bending, welding, grinding, powder spraying, painting, blackening, galvanizing, and other processes. SPHC has good plasticity, weldability, and general forming ability, with low material costs, making it suitable for manufacturing equipment base plates, brackets, reinforcement plates, welded structural parts, ordinary sheet metal structural parts, and industrial parts that do not require high surface precision. Compared to SPCC cold-rolled plates, SPHC has a rougher surface and slightly less precise dimensions, but generally lower costs and are more commonly used in thick plates and structural parts.
By focusing on application scenarios, boundaries of advantages, and non-recommended scenarios, it helps sales, customer service, and quoting staff quickly determine whether the material meets current part requirements.
Low cost, wide material availability, good plasticity, good weldability, suitable for cutting and bending, welded structures, medium and thick sheet metal, powder and painting, industrial equipment structural parts, and low-cost batch processing.
Equipment base plates, mounting plates, brackets, connecting plates, welded structural parts, reinforcement plates, mechanical protective covers, ordinary sheet metal housings, industrial equipment structural parts, base plates, frame connectors, rack accessories, fixture base plates, ordinary stamped parts, bent parts, and metal structural parts for low to medium loads.
High-end fine exterior parts, directly exposed decorative panels, long-term outdoor exposure without rust prevention treatment, highly corrosive environment parts, food direct contact parts, medical implant parts, parts requiring high lightweight, high-precision high-speed transmission parts, highly elastic snap-fit parts, high-hardness wear-resistant parts, and maintenance-free corrosion-resistant metal parts.
The following parameters come from product information and material knowledge fields, used for design review, quotation communication, and preliminary judgment before material selection.
| Material positioning | Suitable for producing ordinary sheet metal structural parts, equipment base plates, mounting plates, brackets, welded parts, protective covers, reinforcement plates, frame parts, and medium- to low-cost industrial sheet metal parts with low appearance requirements. |
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| Precision performance | SPHC is suitable for laser cutting, plasma cutting, flame cutting, CNC punching, bending, welding, and general machining. The cutting profile and hole position accuracy depend on the cutting method and plate thickness; laser cutting accuracy is generally better than plasma and flame cutting. The overall dimensions after bending are affected by plate thickness, bending radius, bend springback, number of bendings, and equipment precision. Welded structural parts are also affected by thermal deformation; precision hole positions and positioning surfaces are recommended for post-processing or separate tolerance control. |
| Dimensional tolerances | Dimensional tolerances for standard laser cutting can be referenced as ± 0.10mm to ±0.30mm; the overall dimensional tolerance after bending can be referenced as ±0.30mm to ±1.00mm; welded structural parts can be evaluated at ±0.50mm-±2.00mm. If plasma cutting or flame cutting is used, dimensional deviations and edge roughness may be even greater. These values are standard reference ranges and do not guarantee absolute tolerances for all structures. In practice, they must be confirmed based on plate thickness, dimensions, cutting method, number of bendings, welding methods, and surface treatment. |
| Minimum Wall Thickness | SPHC is usually selected based on plate thickness, with common thicknesses including 1.0mm, 1.2mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, and above. For ordinary structural parts, the recommended plate thickness should not be less than 1.0mm; for areas requiring welding, riveting, tapping, bearing assembly forces, or structural support, it is recommended to increase thickness appropriately. For small thin plate exterior parts, SPCC cold-rolled plates are usually more suitable than SPHC. |
| Recommended wall thickness | Standard protective covers, partitions, and light-load structural components are recommended at 1.0mm-2.0mm; brackets, mounting plates, connecting plates, and medium-strength structural parts are recommended at 2.0mm-4.0mm; bases, load-bearing brackets, welded frames, and tapping positions are recommended at least 3.0mm, and rigidity should be improved through folding, flanging, reinforcing ribs, or welded frameworks. |
| Minimum aperture | For laser cutting or CNC punching, the recommended hole diameter should not be less than one time the plate thickness, and for stable design, the hole diameter should be no less than 1.5mm-2.0mm. Small holes, dense holes, and holes near the bending line in thick plates are prone to deformation, burrs, slag adsoration, or unstable hole shapes. Screw holes, positioning holes, pressure rivet holes, and assembly holes should be reasonably allowable according to plate thickness, fastener specifications, spraying thickness, and processing method. |
| Assembly clearance | For ordinary sheet metal assembly, it is recommended to reserve 0.20mm-0.50mm on one side; for insertion, flanging, slots, and multi-bend combination structures, it is recommended to appropriately increase the clearance according to plate thickness, bending error, and coating thickness. Welded structural components should reserve greater assembly adjustment space based on welding deformation. If powder, painting, galvanizing, or electrophoresis is needed later, additional consideration should be given to coating thickness to avoid over-tight assembly, paint scraping, or interference from hole positions. |
| Detailed performance | SPHC sheet metal is suitable for making holes, grooves, folded edges, flanges, pressed ribs, counterbores, reinforcing ribs, welded structures, stamped structures, and ordinary sheet metal structural details. Passing through small holes, sharp corners, and narrow bridges requires consideration of burr cutting, stamping deformation, bending cracking, and processing costs. Text, logos, and markings are recommended to be achieved through laser marking, stamping, silk screening, inkjet printing, etching, or nameplates; it is not recommended to design overly fine mechanical cutting text on thick plates or rough surfaces. |
| Surface effect | The original surface of SPHC hot-rolled sheets is usually gray-black, dark gray, or metallic with oxide scale, and may have rolling textures, oil stains, rust spots, or a rough surface. After pickling, the surface becomes cleaner, and after sandblasting or shot blasting, a uniform rough substrate is obtained, making it suitable for powder or painting. After powder spraying or painting, black, white, gray, or other specified colors can be obtained. If a delicate appearance is required, it is usually recommended to switch to SPCC cold-rolled sheet or perform thorough surface pretreatment. |
Based on material characteristics and suitable product ranges, customer needs are broken down into easier application directions to determine.
Equipment base plates, mounting plates, brackets, connecting plates, welded structural parts, reinforcement plates, mechanical protective covers, ordinary sheet metal housings, industrial equipment structural parts, base plates, frame connectors, rack accessories, fixture base plates, ordinary stamped parts, bent parts, and metal structural parts for low to medium loads.
Suitable for producing ordinary sheet metal structural parts, equipment base plates, mounting plates, brackets, welded parts, protective covers, reinforcement plates, frame parts, and medium- to low-cost industrial sheet metal parts with low appearance requirements.
SPHC hot-rolled steel is a low-carbon hot-rolled steel sheet with good formability and weldability, suitable for processing ordinary structural parts and medium-thick sheet metal. Its surface usually has oxide scale, rolled texture, or a rough texture, and its surface quality is inferior to SPCC cold-rolled plate. Therefore, it is more suitable for internal structural parts, welded parts, base plates, brackets, and industrial sheet metal parts used after spraying. SPHC is prone to rust in exposed environments, and in actual use, it usually requires powder spraying, painting, galvanizing, blackening, phosphating, or rust prevention oil treatment.
Based on wall thickness, hole position, assembly clearance, dimensional tolerances, and material usage risks, determine in advance whether the part structure is suitable for SPHC Hot-Rolled Steel Sheet.
Post-processing of SPHC Hot-Rolled Steel Sheet affects appearance, dimensions, hole position, assembly clearance, and usage validation results, and should be explained in advance during quotation, DFM review, and sample confirmation stages.
Post-processing should focus on appearance display, dimensional fitting, connection assembly, and testing verification. Parts involving assembly positions need to be reserved in advance for machining, coating, and trial assembly allowances.
For common issues such as threads, snaps, strength, temperature resistance, and weather resistance, identify in advance whether the material needs to be replaced or if another processing method should be used.
When customer demand exceeds SPHC Hot-Rolled Steel Sheet material boundaries, it is necessary to combine strength, temperature resistance, toughness, long-term stability, and mass production goals to promptly recommend alternative materials or processing technologies.
If better surface quality and spraying effect are needed, SPCC cold-rolled sheets can be chosen; If better basic rust prevention is needed, SECC electro-galvanized sheets or SGCC hot-dip galvanized sheets can be chosen; If higher strength is required, Q235, Q345, or high-strength steel plates can be chosen; If lightweight design is needed, 5052 aluminum alloy or 6061 aluminum alloy can be chosen; If corrosion resistance is required, surface treatment materials such as 304 stainless steel, 316 stainless steel, or aluminum alloy can be chosen.
If customers mainly focus on low cost, ordinary structural strength, welded processing, and medium and heavy plate sheet metal parts, SPHC hot-rolled sheets are a suitable choice. If customers require better appearance and texture, fine sprayed surfaces, or higher dimensional stability, it is recommended to prioritize SPCC cold-rolled plates. If the customer's product needs to be used outdoors for a long time, in humid conditions, salt spray, or corrosive environments, it is not recommended to use exposed SPHC directly. Instead, choose galvanized sheet, stainless steel, aluminum alloy, or add reliable surface protection treatments.
After uploading 3D/2D drawings and supplementing materials, quantities, tolerances, surface treatments, and delivery requirements, XPartsLab will provide next steps in 3D printing manufacturability, cost, and delivery pathways.
