표준
API, API 5CT, API 5L, ASTM A106-2006, BS 1387, DIN EN 10216-1-2004, DIN EN 10025, GB/T 3091-2001, JIS G3446-2004, BS1387 BS EN10217 10219, ASTM A53, GB/T3091-2001 등
학년
10 #-45 #, 10 #, 20 #, 16mn, 16mn, API J55-API P110, API J55, Q195-Q345, Q235, Q345, Q195, Q215