... GB3639--2000) : MAINLY USED FOR FURNITURE, CARS, MOTORBIKES, VIBRATION DAMPER etc.SEAMLESS STEEL SPECIALIZED FOR CARS AND TRUCKSMATERIALS:10#,20#,35 ... #,45#,40Cr,16Mn,20Mn2,20CrMo,30CrMo etc.SPECIFICATIONS FOR ... MAIN PRODUCTS INCLUDE 7 SERIES: SEAMLESS STEEL PIPES FOR USE IN LOW AND MEDIUM PRESSURE BOILERS, PETROLEUM ...