SPFH540 Pickled Steel for Hole-flanged Stampings
Published
SPFH540 is a high-strength hot-rolled forming steel for automotive use. Pickled coil is often chosen for stamped parts requiring hole flanging or local expansion. Purchasing should prepare data on initial hole quality, hole-edge condition, forming direction, and inspection methods rather than judging flanging performance by grade alone. Jiangsu Gaozhen handles enquiries by grade, dimensions and processing requirements.
SPFH540: material and applications
SPFH540 belongs to the high-strength hot-rolled forming steels used for automotive applications. Pickling removes hot-rolled scale so the stock can enter fabrication in the agreed surface condition. For stampings with flanged or locally expanded holes, both material properties and initial-hole quality matter.
Local deformation occurs between the initial and finished hole. Notches, burrs and the hole-making method therefore belong in trial inspection. Describe the change in hole shape, later operations and inspection locations on the part drawing, then assess samples made by the actual process. Interpret hole-expansion behaviour in the context of the part and test conditions.
Material-category reference: https://www.nipponsteel.com/product/catalog_download/pdf/U001en.pdf
Typical parts and processing steps
Stamped parts requiring hole flanging are common in automotive structural parts or brackets. The process typically includes blanking, punching the initial hole, flanging or local expansion, and trimming. The initial hole is usually made by punching or drilling, and its edge quality directly affects subsequent flanging. Purchasing should provide the dimensions and shape of both the initial and final holes, allowable burr limits, downstream forming methods (such as flanging, hole expansion, sizing), and whether subsequent welding or painting is involved. During trials, focus on recording edge cracking, burr height, and changes in forming force rather than inspecting only the general surface. Die clearance and lubrication conditions should also be checked during trials, but their influence depends on specific working conditions.
Purchasing data and rationale
When purchasing SPFH540 pickled coil, in addition to grade and dimensions, prepare the initial and final hole shapes marked on the part drawing, burr control requirements, descriptions of downstream forming operations, and inspection records of hole edges from trial runs. This information helps suppliers understand the application and clarifies mechanical requirements under the contract standard. Requiring trial records of edge condition rather than only the general surface is because hole-edge cracking often originates from local defects. Purchasing should also specify whether slitting or cut-to-length is needed, as well as packaging and marking requirements, to ensure the material is not damaged during transport and storage.
Can higher strength solve hole-edge cracking?
Higher strength alone should not be assumed to solve hole-edge cracking. Cracking relates to initial hole quality, burrs, die clearance, lubrication, forming direction, and other factors, with material strength being only one. If cracking occurs during trials, investigate process parameters and material condition together rather than attributing it solely to insufficient strength. Purchasing can discuss edge conditions from trial records with the supplier and assess whether the material meets requirements under the contract standard.
SPFH540 dimensions and supply enquiry
The Gaozhen SPFH540 product page lists these catalogue dimensions: Thickness range: 0.8-20 mm; Width range: 1000/1250/1500 mm. These values support specification discussions; confirm the required combination of gauge, width and condition for the material.
Discuss pickled stock alongside cut-to-length, slitting and drawing-based cutting. Include the later manufacturing route for parts requiring bending or joining.
Product details: View related product details
Products and processing enquiries at Jiangsu Gaozhen
Jiangsu Gaozhen Trading Co., Ltd. handles trading and processing coordination for steel sheet, coil and related metal materials. Customers can find a grade and discuss drawings, service conditions and manufacturing requirements.
The product range includes cold-rolled, hot-rolled, galvanized and other coated, pickled, spring-steel, carbon-steel and stainless sheet or coil, plus zinc-titanium / zinc-copper-titanium and copper-titanium alloys. For a mixed-material project, list SPFH540 and other grades as separate items with their own specifications.
Product catalogue: https://gaozhenmetal.com/en/products/
Enquire about SPFH540 at Jiangsu Gaozhen
For a SPFH540 enquiry, prepare the following information so the business team can review supply and processing against the actual component.
Material and dimensions: SPFH540, drawing revision or specified requirements, gauge and tolerance, width, and cut length for sheets.
Project conditions: pickled surface and protection, cut sheets or slit coil, later forming and joining operations.
Purchase plan: trial or batch requirement, quantity, delivery destination and requested timing.
Choose “Send enquiry” in the floating assistant, complete product, dimensions, quantity and contact details, confirm consent and submit. A receipt reference confirms that the form has been saved in Gaozhen’s website inbox. A chat message alone is not a submitted enquiry form.
Alternatively, contact Wang Dawei at +86 13861182855 or dawei5373@126.com. Mention this SPFH540 article to help identify the product under discussion.
The business team confirms pricing, available specifications, stock and delivery against the enquiry.