Specifications: 1) Sizes: a) OD: 6-426mm b) WT: 1 - 25mm c) We also can supply thin thickness tubes as customers'''''''' requirements 2) Main grades: 321, 304, 304H, 304L, 316, 316L, 317L, 310S, 630 3) Main technical standards: ASTM A269, ASTM A312, ASTM A213, DIN17440 / DIN17224, NFA35-572 / and other standard as user''''''''s requirements 4) Applications: chemical industry, architecture, petrochemical industry, chemical fertilizer production, food industry, boiler heat exchangers, natural gas industry, pharmaceutics, water transfer, environmental protection and construction & building area 5) Functions: anti-corrosion, heat resistance, high hardness, good tensile ability 6) Special discount: total quantity exceeds 50 tons or each size beyond 20 tons, we can allow special discount Packing: in cartons.