... .0mm 3.length: 4-14m 4.material: Q195,Q235 rectangular steel tube sizes 1.size:20x30mm-600x800mm 2.W.T:0 ... ,XXS etc. LengthLess Than 12mSteel materialQ195 → Grade B, SS330,SPHC, S185Q215 → Grade C,CS Type B,SS330, SPHCQ235 → Grade D,SS400,S235JR ... the production of ERW pipes, square steel Tubes galvanized steel pipes and other steel products.We supply steel pipe with very competitive price to ...