316 A4 Stainless Steel Flat Bar Metal Plate Strip Width 10MM-80MM Length 300MM

316 stainless steel contains molybdenum (typically 2–3%), which significantly improves resistance to chloride-induced pitting and crevice corrosion. This makes 316 (also designated A4) the preferred choice for marine environments, coastal installations, swimming pool surrounds, and applications involving exposure to de-icing salts or mild acids. Grade 304 (A2) is suitable for general indoor use but can show surface rust in salt-laden or humid outdoor conditions over time.

Width determines the visible face of the bar and the surface area available for fastening or welding. Thickness controls bending stiffness and load capacity — a thicker bar resists deflection under load. For light-duty brackets or decorative straps, 3–4mm thickness is typically sufficient. For structural brackets, handrail supports, or load-bearing applications, 6mm or above is more appropriate. If you are unsure, calculate the expected bending moment and compare against the bar's section modulus, or consult a structural engineer for safety-critical work.

Yes. 316 stainless steel flat bars are fully weldable using TIG or MIG processes with a 316L filler rod. Using 316L (low-carbon) filler minimises carbide precipitation at the weld zone, preserving corrosion resistance. Ensure the work area is clean and free of carbon steel contamination. Post-weld passivation with citric or nitric acid solution is recommended for marine or food-contact applications to restore the passive oxide layer.

316 stainless steel forms a self-repairing chromium oxide passive layer that resists rust under most outdoor conditions. In standard atmospheric environments, these bars will remain corrosion-free indefinitely with minimal maintenance. In high-chloride environments (direct ocean spray, splash zones), periodic rinsing with fresh water and occasional passivation treatment will maintain appearance and performance. Avoid prolonged contact with carbon steel tools or surfaces, as iron transfer can cause surface staining.

These bars are supplied pre-cut to 300mm. This listing covers the 300mm length only. If you require a different length, please check our other listings — we stock the same width and thickness combinations in 200mm and other lengths. Custom cutting is not available through this listing; contact us to confirm availability of non-standard lengths.

316 / A4 stainless steel is widely used in food processing equipment, commercial kitchen fabrication, and pharmaceutical environments due to its corrosion resistance and ease of cleaning. The mill finish supplied here is functional for most food-contact uses, though a polished or electropolished finish is preferred where hygiene standards require a smoother surface. For regulated medical device applications, verify material certification requirements with your compliance team before ordering.

There is no minimum order — you can purchase a single piece (1 Pcs) if that is all your project requires. For larger jobs, the 5 Pcs and 10 Pcs multi-pack options offer a lower per-unit cost. Select your preferred quantity from the Amount (Pcs) variant option above before adding to cart.