HC500/780DP Dual-Phase Steel: Forming and Assembly Control for Punch-Hole Reinforced Plates
Published
HC500/780DP dual-phase steel is used for reinforcement plates with punched holes followed by flanging and local bending. Procurement should focus on hole-edge condition, process sequence, and bolt-hole alignment, controlling assembly quality through samples and batch consistency. Jiangsu Gaozhen handles enquiries by grade, dimensions and processing requirements.
HC500/780DP: material and applications
HC500/780DP is a dual-phase steel grade with requirements independent of HC420/780DP; the two cannot be treated as equivalent or substituted unconditionally. For reinforcement plates that are punched, flanged, and locally bent, this grade offers a balance of strength and formability, suitable for parts requiring higher strength while facing hole-edge forming risks. Selection should be based on the part drawing, evaluating flange height, bend radius, and hole-position accuracy, and confirming that material condition matches the process sequence. Procurement should specify coil condition, edge-trim requirements, and a sampling plan to avoid batch variations affecting hole-edge quality.
Material-category reference: https://esales.baosteel.com/baosteel_products/automotive/products/products_03_04.jsp
Typical Parts and Processing Steps
Reinforcement plates typically follow a process sequence of punching, flanging, local bending, and final assembly with adjacent parts. Hole-edge condition directly affects flange quality: punching clearance, die wear, and lubrication should be checked per part requirements; after flanging, inspect for micro-cracks at the hole edge and whether the deformed hole shape meets bolt-hole alignment needs. Process sequence influences stress distribution, so whether to bend before flanging or vice versa should be evaluated through trial dies. Bolt-hole alignment depends on hole-position accuracy and springback control; during trial assembly, check assembly gaps and hole-shaft alignment. Procurement should confirm inspection points for each operation with the supplier to ensure batch consistency.
Procurement Details and Rationale
This entry concerns cold-rolled HC500/780DP. Retain the full designation and specify gauge, shape and surface requirements. For slit material, add slit width, tolerance, cut edges and burr orientation. Stock edges and edges produced by piercing the part are different locations and need separate acceptance criteria.
Trials should cover the actual piercing, flanging and bending sequence rather than relying only on flat samples. Record edge notches, changes in hole shape and mounting-hole alignment. Agree inspection items and frequency against the drawings, and connect trial records with production material identification.
What to do when a hole-edge crack is found
Mark the sample and process stage when a hole-edge crack is found, and refer it for quality and technical assessment against the drawing. Being able to insert a bolt does not establish acceptance. Review the initial hole, cutting edges, process sequence and incoming condition, and record the decision before planning further trials or production.
HC500/780DP dimensions and supply enquiry
The Gaozhen HC500/780DP product page lists these catalogue dimensions: Thickness range: 0.2-6.0 mm; Width range: 1000/1250/1500 mm. These values support specification discussions; confirm the required combination of gauge, width and condition for the material.
For this cold-rolled component, discuss cut-to-length sheets or slit coil against the developed blank. Include the final drawing and scope for cutting, CNC shearing or bending.
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 HC500/780DP and other grades as separate items with their own specifications.
Product catalogue: https://gaozhenmetal.com/en/products/
Enquire about HC500/780DP at Jiangsu Gaozhen
For a HC500/780DP enquiry, prepare the following information so the business team can review supply and processing against the actual component.
Material and dimensions: HC500/780DP, drawing revision or specified requirements, gauge and tolerance, width, and cut length for sheets.
Project conditions: visible faces and surface requirements, stamping or bending operations, critical corners and drawing revision.
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 HC500/780DP article to help identify the product under discussion.
The business team confirms pricing, available specifications, stock and delivery against the enquiry.