... ,150x150 etc. high-quality and competitive price special steel billet size:120x120,130x130,150x150 etc.Special steel billetSize: 100×100mm,120×120mm,150×150mmMaterial ... 4Cr13 65Mn 27SiMnCr12MoV 9Cr18MoApplication: Carbon structural steel, alloy structural steel, gear steel, spring steel, bearing steel, etc.We can smelting the steel billet as clients'request .