... Hand rail 2.Material Q235,Q345B,4130 ,4140,4150 special shaped steel ,Hand rail Business TypeManufacturer, ISO9001 & CE certifiedProductSeamless ... pipes; cold-rolling pipes; alloy steel pipe; special shaped pipesShapeRound, square, rectangular, triangle, hexagonal, oval and other ... 3St52.4DIN1629/45)37Mn5J55Note1)PackingTubes have a heavy coat of protective oil wrapped in heavy gauge waterproof paper ...