316 A4 Stainless Steel Flat Bar Metal Plate Strip Width 10MM-80MM Length 200MM

316 (A4) stainless steel contains 2–3% molybdenum, which 304 (A2) lacks. This addition significantly improves resistance to chloride-induced pitting and crevice corrosion — the type of attack common in marine, coastal, swimming-pool, and chemical-processing environments. For indoor or low-humidity applications 304 is often sufficient, but wherever salt spray, road de-icing salts, or acidic cleaning agents are present, 316 is the more durable choice.

Start with the load or stress the bar must carry. Thicker bars (8mm–15mm) suit structural brackets, gussets, and load-bearing plates. Thinner bars (3mm–5mm) work well for shims, spacers, trim strips, and light-duty mounting tabs. Width determines the bearing surface or flange size — wider bars spread load over a larger area. If you are unsure, err toward a slightly thicker option; the 200mm fixed length means you can cut to final size with an angle grinder or metal-cutting saw.

Yes to all three. For welding, use TIG or MIG with a 316L filler rod to maintain corrosion resistance at the weld zone; avoid overheating to prevent sensitisation. For drilling, use cobalt or carbide-tipped bits with cutting fluid and moderate speed — stainless work-hardens quickly if you dwell without cutting. Cold bending is feasible on thinner sections (3mm–6mm) with a press brake or vice; thicker sections (8mm+) may require heat or a hydraulic press depending on bend radius.

Yes. Grade 316 is the standard specification for marine hardware, boat fittings, dock brackets, and coastal architectural elements precisely because its molybdenum content resists the chloride-rich salt-spray environment that causes 304 to pit over time. For fully submerged seawater applications or highly aggressive chemical exposure, consult a materials engineer, but for typical above-waterline marine and coastal outdoor use, 316 A4 is the appropriate grade.

Order 1 Pc if you need a single piece for a prototype, repair, or one-off bracket. Choose 5 Pcs if you are building a set of matching components (e.g., four corner brackets plus one spare) or want a small buffer stock. The 10 Pcs option offers the lowest per-piece cost and suits production runs, workshop stock, or projects requiring multiple identical parts. All quantities ship as the same grade and dimensions — only the count and price differ.

These bars are supplied with a mill finish (2B-equivalent) and no additional protective coating or film. The 316 alloy's passive oxide layer provides inherent corrosion protection. If you require a polished, brushed, or coated finish for aesthetic or hygienic reasons, the mill-finish surface can be further processed with abrasive belts, flap discs, or electro-polishing after delivery.

316 stainless steel is widely used in food-processing, pharmaceutical, and beverage equipment because it is non-reactive, easy to clean, and resistant to the acidic and saline conditions common in those environments. The mill-finish surface on these bars is not electropolished, so if your application requires a specific surface roughness (Ra) for hygiene compliance, additional finishing will be needed. Always verify with your local food-safety authority for regulated applications.