... ,DIN1629,DIN1630 1.Item name: SAE1020 precision finished cold-drawn seamless steel tube and pipe2.Standard: GB/T3639-83, ... .84.Application: 10,20,35,45,20CrMo precision cold-drawn seamless steel pipe is used in Hydraulic system piping, ... building, machine tool, petrochemical industry, power station, boiler equipment and injection molding machine. precision finished cold-drawn seamless steel pipe