Marine Grade 316L Stainless Steel Sheet ASTM A240 Cold Rolled 2B Finish For Coastal Projects

Marine grade 316L stainless steel sheet adds 2.0 to 3.0 percent molybdenum to the standard 18 8 chemistry, and that single alloying addition is what keeps the surface passive in chloride laden air and salt spray. The molybdenum blocks the pitting and crevice corrosion that ordinary 304 develops within months on a coastal facade or a dockside handrail. The low carbon 316L variant also resists sensitisation at weld seams, so fabricated tanks and frames keep their corrosion resistance in the heat affected zone instead of rusting along the bead. Sheet is supplied cold rolled and annealed with a 2B finish, ready for forming, welding and passivation at the fabricator end.

• Molybdenum Pitting Resistance: A molybdenum content of 2.0 to 3.0 percent lifts the pitting resistance equivalent number above 25, so the sheet holds up in salt spray and coastal humidity where 304 stains.
• Low Carbon Weldability: Carbon is held at 0.03 percent maximum, which prevents chromium carbide precipitation at the seam and lets welded assemblies skip post weld solution annealing.
• Cold Rolled 2B Finish: Skin passed and annealed to a smooth matte surface that releases soil easily, giving a consistent base for passivation, pickling or brushing.
• Certified To ASTM A240: Every heat is tested and certified to ASTM A240 and EN 10088-2, with the mill test certificate issued against the actual heat number printed on the bundle.
• Gauge Range 0.5 To 6.0mm: Covers thin panels for cladding through heavy gauge for tank shells and structural brackets, all held to half standard thickness tolerance.
• Stock And Cut To Size: Held in a Wuxi warehouse five hours from Shanghai port, sheets can be sheared to nominated blanks and shipped within two weeks of a confirmed order.

The grade is specified for salt water exposure: marina walkways, pier handrails, ferry interiors, offshore platform grating, coastal balustrades and swimming pool surrounds. Chemical and process plants use it for storage tanks, heat exchanger shells, piping spools and pump base plates. Because the surface is hygienic and easy to sanitise, the same sheet serves pharmaceutical clean rooms, dairy processing lines, brewery vessels and commercial kitchen benches. Food and beverage fabricators select 316L whenever the product stream is acidic, salty or chlorine based, since 304 simply will not hold passivation under those conditions. Coastal architects also use it for window surrounds and roof flashings where airborne chloride is constant.

Bundles are interleaved with neutral paper to stop fretting between sheets, wrapped in plastic film and strapped to a fumigated wooden pallet built to container dimensions. Export packing is seaworthy and proven on repeated sea voyages into Europe, Southeast Asia and South America. Each lot is inspected for thickness, width, flatness and surface condition before loading, and the mill test certificate, grade certificate and packing list accompany the shipment. SGS or BV third party inspection can be booked at the buyer request. Heat number traceability is maintained from coil through finished sheet, and we support destination re inspection with the original test records.