... N/MM2 580 N/MM24. SUPPLY CONDITIONCold drawn seamless steel tube, stress relieved and honed or skived roller burnished5. SURFACE ... +2mm> 500mm ≤ 2000mm, +3mm> 2000mm ≤ 5000mm, +5mm> 2000mm ≤ 7000mm, +10mm11. TUBE ENDSTube ends shall be cut nominally square to the axis ... smooth internal and external surface consistent with cold workingprocess, tube inner surface should be free from rust, scratches and ...