1.Welded stainless steel square tube for stair rail,safety window, guard door etc 2. Material: 201, ... 304, 316, 430, etc Welded Stainless Steel Square Tubes:10*10mm~150*150mm Thickness: 0.40 to 5 ... /T12770; ASTM A554; JIS G3446; DIN EN10296-2Application: Mainly applied for machinery, medical fitness equipment, electroplating, dyeing, trains, cars, bicycles, furniture ...