... with tight size tolerance,perfect surface quality and corresponding properties. We can produce Cold Drawn Seamless Mechanical Steel Tubes & Pipes, Hydraulic Steel Tubes ... Heat treatment: annealed, brightannealed, stress relieved, normalized, spheroidize annealed, or cold finished3) Standards: ASTM/ASME, SAE, AMS,JIS, BS, DIN, ... per your actual requirements as soon as possible. Cold Seamless Steel Tube