steel tube 1.material:ST33,ST37,ST35.8,ST44,ST42,ST45ST52; ... peer industry all the way and guide the development of product technolog orientation. steel tube Seamless Pipe Typesteel tubeSize1/2"-32"Wall ... ,17175,2448MaterialST37/ST33/ST35.8/ST44/ST42/ST45/ST52Packagingpipe cap, steel strips bundled.Applications range petroleum, construction ,shipbuilding,smelting, aviation, power ...