Square Steel Tub for Building Material

Commodityblack/galvanized square steel pipeSize20x20--400x400mm   (square) 20x40--400x600mm  (rectangular)Wall thickness0.7-20mm  Length5.8m 6m or based on your requestStandardASTM A500 and so on (the Chinese material can be Q195,Q235Q345)SurfaceBlack, or Galvanized and Oiled to prevent the rust  End finishPlain endMaterial   Q195→grade B, SS330, SPHC, S185  Q215→grade C, CS Type B, SS330, SPHC  Q235→grade D, SS400, S235JR, S235JO, S235J2Standards  ASTM A53, BS1387, DIN2440  SGS, ASTM-A53A, BS1387-1985  GB/T3091-2001, GB/T8162, GB/T8163:10#, 20#, 35#, 45#  16MN(Q345B)GR. A, GR. B, GR. C  ASTM A106 GR. A, GR. B, GR. C  API 5L A B X42, X46, X52, X60, X65, X70, X80    Certificates: API 5L, API 5CT, ISO, CEUsageconstruction, building materialPackingIn bundles, packed in woven bag or as your request.HS code   7306610000  /* January 22, 2024 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(",").forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1