1.stainless steel welded square tubeS for stair rail,safety window, guard door etc 2. Material: 201, ... 304, 316, 430, etc Features of welded stainless steel square tubes: Diameter: 10*10mm~150*150mm Thickness: 0.40 to 5 ... ; ASTM A554; JIS G3446; DIN EN10296-2 Application: Mainly applied for machinery, medical fitness equipment, electroplating, dyeing, trains, cars, bicycles, furniture ...