Import Astm Duplex 2b Ba No.4 Stainless Steel Plate — Buy in wholesale FOB from Supplier in China

This ASTM duplex stainless steel plate is available in grades 2205 and 2507, offering a dual-phase austenitic-ferritic microstructure that delivers approximately double the yield strength of standard austenitic grades such as 304 and 316. The material is supplied in plate form with surface finishes including 2B, BA, and No.4, selected according to application requirements for corrosion resistance, aesthetic appearance, or further fabrication. The standard designation covers UNS S32205 for grade 2205 and UNS S32750 for grade 2507, with chemical composition limits for carbon, silicon, manganese, phosphorus, and sulfur as specified in ASTM A240. Duplex grades are characterised by high resistance to chloride stress corrosion cracking, pitting, and crevice corrosion, making them suitable for aggressive environments where conventional stainless steels would fail.

The 2B finish is a cold-rolled, annealed, and pickled surface with moderate reflectivity, typically specified for industrial equipment where surface smoothness aids cleanliness but decorative appearance is secondary. The BA (bright annealed) finish achieves higher reflectivity through controlled atmosphere annealing, suitable for architectural and decorative applications where a mirror-like surface is required without additional polishing. The No.4 finish is a general-purpose polished finish with unidirectional grain, commonly used in kitchen equipment, elevators, and pharmaceutical processing surfaces where hygienic properties and moderate aesthetic appeal are both important. Typical plate thickness ranges from 0.5 mm to 50 mm for cold-rolled product and above 3.0 mm for hot-rolled plate, though specific thickness availability should be confirmed with the supplier. Standard widths are 1000 mm, 1219 mm, 1500 mm, and 2000 mm, with lengths of 2000 mm, 2438 mm, 3000 mm, 5800 mm, or 6000 mm, or in coils for thinner gauges.

The primary applications for this duplex plate include chemical processing equipment, offshore platform structures, heat exchangers, desalination plant components, pulp and paper processing machinery, and marine propeller shafts. The higher strength-to-weight ratio of duplex grades permits thinner section design, reducing material cost and structural weight in large fabrications. Buyers typically include engineering contractors, shipyards, oil and gas equipment fabricators, and chemical plant operators in Europe, Southeast Asia, and the Middle East. The supplier specifies payment terms of 30 percent deposit with balance against copy of bill of lading, which is a standard trade arrangement for Chinese steel exporters. Importers should verify that the stated grade, surface finish, and dimensional tolerances meet project specifications, and request mill test certificates with actual chemical composition and mechanical property values for the specific heat supplied.

Jiangsu Steel Group Co., Ltd. maintains its registered address at 10/f No.257 Siping Road, Shanghai 200080, Hongkou District, China, though the company name suggests Jiangsu Province origins with a Shanghai commercial office. The supplier holds imported tier and harbor trust tier classifications on this marketplace, indicating a profile with some verified elements but not the highest verification level available. The response rate is recorded at 0.00 with zero average response hours, meaning no platform-tracked inquiry responses have been measured. This absence of response data does not indicate non-operation, but buyers should initiate contact through multiple channels to verify current activity and responsiveness. The Shanghai address places the commercial office within China's primary steel trading hub, with proximity to Shanghai port facilities for export logistics coordination.

The company's product focus is on duplex stainless steel plate in grades 2205 and 2507 with multiple surface finishes, targeting industrial manufacturing sectors globally. No specific mill facility location, production capacity, annual tonnage, ISO quality system certification, or environmental management certification is stated in the available profile. The source description mentions chemical composition elements (C, Si, Mn, P, S) without providing actual tested values or mill certificate sample data. Buyers should request company registration documents, steel production or processing licences, and quality management system certificates. Reference customers or project track records in offshore, chemical, or marine sectors should be sought to validate application experience. The payment term structure offered is conventional for Chinese steel exporters, but letter of credit terms may be negotiable for larger orders or established trading relationships.