Import 317 Mirror 3mm Stainless Steel Coil — Buy in wholesale FOB from Supplier in China

This 317 mirror 3mm stainless steel coil from Jiangsu Steel Group Co., Ltd. is a cold-rolled austenitic product with molybdenum addition, manufactured to ASTM A240 with surface finish 8K mirror. The 3.0mm thickness places it in the heavier gauge range for decorative and structural fabrication, with the mirror finish achieved through progressive mechanical polishing and passivation. The coil format allows continuous feeding into stamping, laser cutting, and CNC bending operations, reducing material waste compared with sheet formats. Type 317's 3-4% molybdenum content delivers markedly better resistance to chloride-induced pitting than 304 or 316 grades, a critical factor for coastal installations and chemical exposure.

The material conforms to standard compositions for 317/317L with controlled carbon for welded fabrication, though buyers should verify whether the supply is dual-certified 317/317L or straight 317. The mirror surface (8K, equivalent to Ra < 0.05 micrometres) requires PVC film protection during transit and handling to prevent scratches that would destroy the reflective integrity. Cold-rolled manufacture from slab ensures tighter dimensional tolerances than hot-rolled alternatives, with typical thickness tolerance of +/-0.05mm for 3mm gauge in standard commercial strip. The coil is supplied with interleaved paper or film, and outer diameter is typically limited to under 1500mm for containerised ocean freight from Shanghai port.

Primary buyers include architectural metalwork fabricators, pharmaceutical equipment manufacturers, and specialist food processing OEMs where both corrosion resistance and aesthetic finish are specified. The 3mm gauge suits column cladding, lift door panels, sterile chamber linings, and exhaust ducting where weldability and form retention matter. For import procurement, buyers should confirm whether the coil is slit-edge or mill-edge, as this affects nesting yields in laser cutting. The supplier's Shanghai location offers port proximity for FOB Shanghai shipment, though response data is not available to confirm current lead time or minimum order tonnage.

Jiangsu Steel Group Co., Ltd. maintains its registered office at 10/F, No.257 Siping Road, Shanghai 200080, Hongkou District, China, placing it within the city's core commercial district rather than at a production site. The supplier is classified as an imported-tier vendor with harbour trust tier, and holds a response rate of 0.00% with zero average response hours recorded, indicating no recent engagement metrics are available for buyer reference. The listing presents standard mill-grade stainless coil products with no verification of manufacturing asset ownership, third-party audit status, or export licence disclosure. Buyers should treat quoted standards compliance as supplier-declared rather than independently certified.

The company profile does not state year of establishment, number of employees, annual output, or domestic market share, so any assessment of production scale relies on direct enquiry. The Siping Road address suggests trading-company or sales-office operations, with physical mill location unspecified, a common arrangement for Chinese steel exporters. For due diligence, importers should request mill test certificates with heat numbers, ISO 9001 scope certification covering 317 production, and references for mirror-finish coil shipments to their region. The absence of response data means buyers must initiate contact to confirm current availability, pricing cycle, and whether coils are stocked in Shanghai or produced to order.