430 Brushed Stainless Steel Sheet Thickness 0.3–2.0mm Size 1000×2000mm Hairline No.4 BA Steel Plate

Grade 430 is a straight-chromium ferritic stainless steel containing 16.0–18.0% chromium with negligible nickel content. This places it in a fundamentally different metallurgical family from the austenitic 304 and 316L grades that dominate corrosion-intensive applications. The ferritic structure gives 430 a set of properties that, in the right application, represent genuine advantages rather than compromises.

The most immediately noticeable difference is magnetic permeability. Unlike 304, which is non-magnetic in its annealed state, 430 is strongly magnetic at all times. In practical terms, this means 430 panels can be attached with magnetic fasteners, mounted onto magnetic backing boards, or used as the substrate for magnetic signage and displays. For appliance doors, whiteboard surfaces, retail display systems, and removable access panels, this magnetic response transforms the material from a passive surface into a functional interface. Kitchen appliance manufacturers have long understood this advantage—refrigerator doors across the global appliance industry are overwhelmingly made from 430 for precisely this reason.

The thermal expansion coefficient of 430 is approximately 30% lower than that of 304. In applications subject to temperature cycling—oven door inner panels, toaster housings, fireplace surrounds, automotive exhaust trim—this reduced expansion translates to lower thermal stress, less distortion, and better long-term dimensional stability. Components maintain their fit and flatness through heating and cooling cycles that would cause austenitic grades to warp or buckle.

Thermal conductivity is approximately 40% higher than 304. While stainless steel in general is a poor conductor compared to aluminum or copper, 430's relative advantage is meaningful in heat exchanger applications, cookware bases, and components where heat must be transferred through the material efficiently. A 430 sheet will reach thermal equilibrium faster than an equivalent 304 sheet, reducing hot spots and thermal gradients.

In terms of formability, annealed 430 offers excellent deep-drawing characteristics. Its lower work-hardening rate compared to 304 means it can be drawn into deeper, more complex shapes without intermediate annealing steps. This property has made 430 the material of choice for pressed stainless steel sinks, drawn cookware bodies, automotive wheel covers, and formed appliance panels. Tooling lasts longer, press forces are lower, and production rates are higher than with austenitic grades of equivalent thickness.

We supply 430 sheets with three distinct surface finish options, each suited to different end-use requirements and aesthetic preferences. Understanding the differences ensures the correct finish is specified for the application.

The hairline finish—also widely referred to as HL or long-grain brushed—is produced by continuous belt brushing with 150–240 grit abrasive belts running the full sheet length. The result is a uniform, continuous linear grain with consistent depth and spacing from edge to edge. Under directional lighting, the surface displays a soft, satin-like luster with minimal reflectivity. Hairline-finished 430 sheets are the standard choice for interior decorative panels, elevator wall cladding, column covers, retail display fixtures, and furniture surfaces. The linear grain naturally masks fingerprints and minor scuffs, making it practical for high-touch environments. When panel alignment is critical—wall joints, door edges, corner returns—consistent grain direction across all sheets ensures visual continuity across the entire installation.

The No.4 finish is a close cousin to hairline but is produced with a slightly coarser grit range, typically 120–180 grit, resulting in a more pronounced grain texture and marginally higher reflectivity. No.4 is the finish most commonly specified in architectural specifications for commercial interiors, restaurant equipment, and food service surfaces. It provides the same fingerprint-masking and scratch-concealing properties as hairline, with a slightly brighter visual presence that can be desirable in well-lit spaces. For the fabricator, No.4 is also the most forgiving surface to field-repair; a handheld abrasive pad can blend scratches and weld burn-through to an acceptable match, a property that reduces rejection rates and rework costs on complex installations.

The BA (Bright Annealed) finish is fundamentally different from mechanically brushed surfaces. BA sheet is produced by annealing the cold-rolled strip in a controlled atmosphere furnace that prevents oxidation, preserving the reflective brightness of the cold-rolled surface without the need for post-annealing pickling. The result is a mirror-like, highly reflective surface with superior flatness and a distinctive bright white metallic appearance. BA 430 sheet is specified for applications where reflectivity is desired—lighting reflectors, mirror backing plates, decorative trim, appliance control panels, and display components. Unlike post-polished mirror finishes, BA achieves its brightness without mechanical abrasion, meaning the surface is free from the microscopic polishing lines and embedded abrasive particles that can initiate corrosion in aggressive environments. For indoor decorative applications, BA 430 delivers a near-mirror aesthetic at a fraction of the cost of polished 304.

The 1000×2000mm sheet format has become a standard in markets where metric dimensional coordination governs architectural and manufacturing modules. At one meter by two meters, the sheet is large enough to yield efficient part nesting for most appliance panels, cabinet components, and decorative wall elements, while remaining small enough to be handled by a single operator, cut on compact CNC routers or shears, and transported without specialized heavy-lift equipment.

For appliance manufacturing, the 1000×2000mm format aligns well with the dimensions of refrigerator door panels, dishwasher fronts, oven door outers, and range hood bodies. Multiple parts can be nested within a single sheet with minimal waste, and the sheet size integrates smoothly into automated production lines designed around standard blank dimensions. For interior decoration and signage, the 2000mm length provides a useful floor-to-ceiling or wall-to-wall dimension that minimizes horizontal joints in panel layouts.

Our 430 brushed sheet range covers 0.3mm to 2.0mm, a deliberately chosen span that addresses the thickness requirements of the industries and applications where 430 excels.

At 0.3mm and 0.4mm, the sheets serve as lightweight decorative laminates. These gauges are not self-supporting in large panel applications but are intended for bonding to substrates—MDF, particle board, aluminum honeycomb, or rigid foam—to create finished composite panels. Appliance door skins, cabinet fascia panels, and lightweight trim components are typical applications. The thin gauge minimizes material cost while the substrate provides the structural rigidity that the stainless steel alone cannot deliver. The BA finish is particularly popular in this thickness range for control panel trim and display bezels where a bright, reflective surface is desired.

The 0.5–0.8mm range covers the majority of formed component applications. Kitchen splashbacks, range hood bodies, toaster and small appliance housings, automotive interior trim, pressed sink bowls, and formed furniture panels all fall within these gauges. At 0.6mm and above, the sheet provides sufficient self-supporting rigidity for moderately sized panels while remaining highly formable for deep drawing and stretch forming operations. These are the thicknesses where 430's formability advantage over 304 is most pronounced; the lower work-hardening rate allows deeper draws in fewer steps, reducing manufacturing cost and improving production throughput.

From 1.0mm to 1.5mm, we supply sheets for applications requiring greater dent resistance and structural contribution. Appliance outer bodies, oven door structural panels, automotive wheel covers and trim, cookware bodies, and wall-mounted shelving systems are representative applications. At these gauges, panels maintain flatness across larger unsupported spans and resist the impact damage that would deform thinner material. The No.4 and hairline finishes in this range are specified for high-traffic commercial interiors where durability against scuffs, impacts, and cleaning chemicals is essential.

At 2.0mm, 430 enters structural decorative territory—heavy-duty kitchen countertops, restaurant work surfaces, elevator kick plates, door push plates, and formed structural brackets. This gauge provides substantial impact resistance and can be welded into load-bearing assemblies where the stainless steel itself contributes to mechanical strength rather than merely cladding a separate structure.

Honest specification of 430 requires clear communication of its corrosion resistance boundaries. Grade 430 contains no molybdenum and negligible nickel, and its chromium content, while substantial at 16.0–18.0%, is present in a ferritic matrix that does not form quite as robust a passive layer as the austenitic grades. The material will resist oxidation and maintain its appearance indefinitely in clean, dry indoor atmospheres—offices, retail spaces, residential interiors, and controlled manufacturing environments.

In mildly corrosive indoor environments—kitchens, bathrooms, laundry areas, and food preparation spaces—430 performs adequately when cleaned regularly and kept dry between uses. However, it will develop superficial rust staining if exposed to standing water, salt residues, bleach-based cleaners, or acidic food spills left in prolonged contact. These stains are typically cosmetic rather than structural, and they can be removed with standard stainless steel cleaners, but they indicate that the passive layer has been breached and the underlying metal has reacted.

For outdoor applications, 430 is suitable only in mild, low-humidity environments, and even then, some surface oxidation should be expected over time. The material is not recommended for coastal locations, industrial atmospheres containing sulfur compounds, or any environment where de-icing salts, swimming pool chemicals, or marine aerosols are present. In these conditions, 304 or 316L should be specified.

The key to successful 430 specification is understanding that it is an interior-grade stainless steel. Within that domain—appliances, kitchenware, interior decoration, automotive trim, retail displays—it delivers outstanding performance and genuine cost efficiency. Pushed beyond its environmental limits, it will disappoint. Applied within them, it serves for decades without issue.

Fabricators who work primarily with 304 will find 430 a welcome material to process. Its lower strength and work-hardening rate translate to longer tool life, lower press forces, and faster cycle times. Shearing, punching, and blanking operations proceed with noticeably less edge burr formation, reducing deburring labor. Bending requires less tonnage, and the spring-back behavior is more predictable than with 304—a meaningful advantage when setting up press brake programs for repeat production runs.

The magnetic response of 430 can be either an advantage or a challenge depending on the process. In welding, arc blow can occur with DC welding currents due to the material's ferromagnetism; this is managed by using AC current or by demagnetizing the workpiece before welding. For most sheet metal fabrication, however, welding of 430 is less common than mechanical fastening, adhesive bonding, or clinching, so arc blow is rarely encountered in practice.

When welding is required, 430-compatible filler metals must be used. The heat-affected zone will experience grain growth that embrittles the area—a characteristic of ferritic stainless steels that does not occur with austenitic grades. Post-weld annealing can restore ductility, but for most decorative applications, the simplest approach is to design assemblies that avoid the need for welding altogether, using folded corners, mechanical fasteners, or structural adhesives to join panels.

Each 430 brushed sheet ships with a protective PVC film on the finished face. Sheets are interleaved with protective paper, stacked on export-grade pallets, and weatherproof-wrapped for transit. Grain direction is marked on the packaging and on the protective film of each individual sheet, enabling fabricators to maintain directional consistency across all panels in a given installation. Mill test certification to EN 10204 3.1 is provided with every shipment, documenting chemical composition and mechanical properties traceable to the originating heat.

If you have a specific appliance model, interior fit-out project, or production volume in mind, I can provide detailed weight-per-sheet calculations, advise on finish selection for your particular lighting and touch-exposure conditions, or prepare a commercial quotation aligned with your delivery requirements.