stainless steel tube material: 201 202 301 304 316 shape: round , square PED, AD and DNV ISO 9001:2008 CERTIFICATEDStainless Steel Square TubeSupply Capacity: 10000 tons/yearFeatures:STANDARDS: ASTM / ASME, GB, DIN, JIS, T14975, etc. GRADE :200 (Ni : 0.8%), 201B (Ni : 3%), 201H (Ni : 5%) 301 (Ni : 6%), 304, TP304, TP304L/304L, 321, TP321, 316, TP316L, 316L, 316Ti 317, 317L, 309S, 310S(2520), 347, ...