SAE AMS5564C
SAE AMS5564C Steel, Corrosion Resistant, Tubing 19CR - 10Ni (SAE 30304) High-Pressure Hydraulic, Welded Plus Ultrasonically Tested or Seamless Cold Drawn, One Eighth - Hard Temper
standard by SAE International, 04/19/2013
standard by SAE International, 04/19/2013