Import 303 Hr Stainless Steel Coil Plate — Buy in wholesale FOB from Supplier in China

303 HR (Hot Rolled) Stainless Steel Coil Plate is an austenitic chromium-nickel stainless steel with deliberate sulfur addition to improve machinability, designated UNS S30300 under ASTM A240 and 1.4305 under EN 10088-2. Jiangsu Steel Group Co., Ltd. supplies this grade in hot rolled condition with surfaces including No.1, 2B, BA, No.4, No.8, and 8K mirror finishes, with thickness from 0.1 mm to 100 mm and widths from 1000 mm to 2500 mm. The material is stocked and distributed from their Shanghai office with mill origin from Jiangsu Province, China's largest stainless steel production region.

The sulfur content in 303 grade, typically 0.15 percent minimum, creates manganese sulfide inclusions that reduce galling and tool wear during high-speed machining operations, though this same addition lowers corrosion resistance compared to 304 grade. The alloy contains 17-19 percent chromium and 8-10 percent nickel with 0.15 percent carbon maximum, and is not suitable for marine environments or aggressive chloride exposure. Hot rolled plate in the 3 mm to 100 mm range is solution annealed and pickled, with typical mechanical properties including 515 MPa minimum tensile strength and 205 MPa minimum yield strength per ASTM A240.

Primary applications include machined components for the food processing, pharmaceutical, and chemical industries where extensive secondary machining is required: fittings, shafts, valves, fasteners, and pump parts. The coil form allows continuous feed into stamping and blanking operations, while cut-to-length plate serves fabricators serving the petroleum, power generation, and medical equipment sectors. Buyers should confirm with Jiangsu Steel Group whether their 303 material is produced to ASTM A240, GB/T 3280-2007, JIS G4304-2005, or EN 10088-2-2005, as mechanical properties and testing requirements differ across these standards.

Jiangsu Steel Group Co., Ltd. maintains their sales office at 10/F, No.257 Siping Road, Shanghai 200080, in Hongkou District, with operational headquarters presumably in Jiangsu Province given the company name. The supplier holds harbor-tier trust status on the platform, indicating baseline verification without additional audit layers. Their response metrics show 0.00 percent response rate with zero average response hours, which may reflect data synchronisation issues rather than operational status, though buyers should test responsiveness directly before committing to orders.

The company positions itself as a multi-grade stainless steel stockist and mill representative, offering materials across the 200, 300, and 400 series plus duplex grades, with standard reference to ASTM, GB, JIS, and EN specifications. No manufacturing asset details, mill partnerships, or processing capabilities are specified in the profile. The Shanghai location suggests port-logistics advantage for export, with proximity to Shanghai Port or Taicang for containerised and bulk shipment. Buyers should verify whether Jiangsu Steel Group holds ISO 9001 quality management certification, whether they maintain mill test certificates with full chemical and mechanical traceability, and their financial standing for letter of credit transactions.