In our process we use:
-hot rolled material: Ck45 / 2C45; Ck55 / 2C55; 20MnV6; 42CrMo4/V
dimension: 22mm-105mm
length: 6500mm-7000mm(-0/+100)mm
-cold drawn and stress relieved, symbol BK+S (+SR) according DIN 2391 (EN 10305-1) standards for hydraulic cylinders
length: 5500mm-9000mm(-0/+100)mm
-cold drawn, symbol BK according DIN 2393 (EN 10305-2) standards for hydraulic cylinders
length: 5500mm-9000mm(-0/+100)mm