Standard
API, API 5L, ASTM A106-2006, ASTM A312-2001, ASTM A53-2007, ANSI A213-2001, BS 1387, DIN 1629/3, GB 5310-1995, GB/T 5312-1999, JIS G3455-2005, JIS G3452-2004, JIS G3429, GB/T3636-2000
Grade
10#-45#, 45#, Cr-Mo alloy, 15crmo, Q195-Q345, Q345, ST35-ST52, ST52