... . COLD DRAWN PRECISE SEAMLESS STEEL (GB3639--2000) : MAINLY USED FOR FURNITURE, CARS, MOTORBIKES, VIBRATION DAMPER etc.SEAMLESS STEEL SPECIALIZED ... #,20#,35#,45#,40Cr,16Mn,20Mn2,20CrMo,30CrMo etc.SPECIFICATIONS FOR COLD DRAWN SEAMLESS STEEL:OUTER DIAMETER: 12~168MMWALL THICKNESS: ... ~25MMOUR MAIN PRODUCTS INCLUDE 7 SERIES: SEAMLESS STEEL PIPES FOR USE IN LOW AND MEDIUM PRESSURE BOILERS, PETROLEUM CASING ...