DX51D+ZF Alloyed Galvanized Steel: Confirming Surface for Welded and Painted Parts
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DX51D+ZF is an alloyed galvanized steel coil. The ZF suffix denotes a zinc-iron alloy coating with a grey surface, unlike conventional Z zinc coating. For welded sheet-metal boxes that will be painted, buyers should specify the ZF suffix, coating requirements, oil film condition and paint route, and coordinate incoming surface, cleaning, joining and painting as one package. Jiangsu Gaozhen handles enquiries by grade, dimensions and processing requirements.
DX51D+ZF: material and applications
DX51D+ZF is sheet and coil with a zinc-iron alloy coating, commonly called galvannealed steel. ZF and Z identify different coatings and can look different: galvannealed surfaces are usually grey, so acceptance should not be based on an expectation of bright zinc spangle. State the full grade, coating requirements and surface class separately.
For a sheet-metal box that is welded and then painted, incoming surface, joining and finishing are linked. Discuss ZF within that process route, define each operation’s requirements and inspect actual samples before arranging material and finishing independently.
Material-category reference: https://www.ssab.com/en/brands-and-products/steel-categories/coated-steel/metal-coated-formable-steels
Box Welding and Painting Process
Sheet-metal boxes are typically made from base, side panels and connectors through blanking, bending, welding and painting. For DX51D+ZF incoming material, buyers should define part requirements: which faces are cosmetic, whether weld locations are visible, whether grinding is needed after welding, and whether cleaning and conversion coating are scheduled before painting. The alloyed galvanized surface is sensitive to welding parameters; current, electrode condition and joint design should be evaluated against the equipment and part rather than copying experience from other coatings. The paint route should be stated in advance: overall pre-treatment after welding, or local repair. Cleaning should be verified against the actual surface; the ZF suffix alone does not mean pre-treatment can be skipped.
Purchasing Details to State in the Order
The purchase order should state DX51D+ZF in full, with coating requirements including the coating designation and the agreed surface quality level. Oil film condition should be clear: oiled or unoiled; if oiled, state oil type and application range so cleaning can be matched. The paint route should also be included in technical communication: paint system, pre-treatment method, and whether post-weld grinding is required. The reason is that the ZF suffix only identifies the coating category; it does not cover surface acceptance, oil film or paint compatibility. Putting these conditions in one order lets the supplier and painter prepare and trial against the same target.
Can an Existing Z Cleaning Process Be Reused?
Not directly. Z zinc coating and ZF alloyed coating have different surface conditions, and the effects of cleaner, concentration, temperature and time should be confirmed by surface-treatment validation. Run cleaning and painting trials on actual box parts, check appearance after cleaning, paint adhesion and weld joint condition, then decide whether pre-treatment needs adjustment. Do not assume ZF material can skip pre-treatment before validation.
DX51D+ZF dimensions and supply enquiry
The Gaozhen DX51D+ZF product page lists these catalogue dimensions: Thickness range: 0.25-3.0 mm; Width range: 1000/1250/1500 mm. These values support specification discussions; confirm the required combination of gauge, width and condition for the material.
Discuss substrate, coating, surface condition and blank dimensions separately, then coordinate stock with cut-to-length, slitting or forming needs.
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 DX51D+ZF and other grades as separate items with their own specifications.
Product catalogue: https://gaozhenmetal.com/en/products/
Enquire about DX51D+ZF at Jiangsu Gaozhen
For a DX51D+ZF enquiry, prepare the following information so the business team can review supply and processing against the actual component.
Material and dimensions: DX51D+ZF, drawing revision or specified requirements, gauge and tolerance, width, and cut length for sheets.
Project conditions: full substrate designation and coating suffix, coating and surface requirements, forming and subsequent finishing.
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 DX51D+ZF article to help identify the product under discussion.
The business team confirms pricing, available specifications, stock and delivery against the enquiry.